UNITED STATES DEPARTMENT OF THE INTERIOR …15 09 15 09 15 12 16 38 16 55 17 19 17 44 18 07 18 41 18 54 19 28 19 30 20 18 20 52 21 31 21 50 22 12 22 21 22 22 20 37 51 48 11 22 19 16

UNITED STATES DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

PRELIMINARY DETERMINATION OF EPICENTERS MONTHLY LISTING

APRIL - JUNE 1993

NATIONAL EARTHQUAKE INFORMATION CENTER

Open File Report

93-600-B

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards.

1993

US. DEPARTMENT OF THE INTERIOR /GEOLOGICAL SURVEYNational Earthquake Information Center

APRIL 1993

K DAYE Y

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HR MN SEC

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REGION. CONTRIBUTED MAGNITUDES AND COMMENTS

SOUTHERN NORWAY. MD 2.1 (BER).SOUTHERN GREECE. ML 3.5 (ATH). 3.4 (THE).GREECE-ALBANIA BORDER REGION. ML 3.5 (THE). MD 3.7(ATH).CORSICA. ML 2.1 (GEN).GREECE. ML 2.5 (THE).FRANCE. ML 1.8 (LOG).TURKEY. MD 2.9 (ISK).ALBANIA. ML 3.7 (THE). MD 3.8 (ATH).NEW GUINEA, PAPUA NEW GUINEAKOMANDORSKY ISLANDS REGIONFIJI ISLANDS REGION. Mw 5.7 (HRV).SOUTH ISLAND. NEW ZEALANDFIJI ISLANDS REGIONSOUTHERN ALASKA. <AEIC>. tNEAR COAST OF CENTRAL CHILE. MD 4.7 (SAN). Felt in theQuintero area.FLORES REGION. INDONESIAPYRENEES. ML 1.0 (STR)EGYPT. MD 3.7 (HLW).NEAR SOUTH COAST OF FRANCE. ML 3.2 (STR).EASTERN NEW GUINEA REG.. P.N.G.NEAR COAST OF CENTRAL CHILE. MD 4.1 (SAN).NORTHERN CHILEREPUBLIC OF SOUTH AFRICA. ML 2.3 (PRE).NEAR COAST OF CENTRAL CHILE. MD 3.4 (SAN).AEGEAN SEA. ML 3.7 (ATH). 3.7 (THE). MD 4.0 (ISK).WYOMING. ML 3.0 (GS). 3.1 (BUT).NORTHWESTERN BALKAN REGION. ML 2.2 (TTG).SICHUAN. CHINA. ML 3.8 (BJI).SOUTHERN GREECE. ML 3.4 (ATH), 3.1 (THE).EAST OF NORTH ISLAND, N.I. ML 4.0 (WEL).GREECE. ML 3.2 (THE).TURKEY. MD 3.5 (ISK).FIJI ISLANDS REGIONCENTRAL CALIFORNIA. <GM-P>. MD 2.7 (GM). ML 2.4 (GS).CRETE. MD 3.6 (ATH).MYANMAR-INDIA BORDER REGION. Mw 5.1 (HRV).SOUTHERN CALIFORNIA. <PAS-P>. ML 3.1 (PAS). 2.8 (GS).SANTA CRUZ ISLANDSPOLAND. ML 3.3 (VIE), 3.3 (GRF).NORTH OF HALMAHERA, INDONESIAMYANMAR-INDIA BORDER REGIONCOSTA RICAOFF E. COAST OF N. ISLAND. N.Z.SOUTHERN NORWAY. MD 1.8 (BER).SOUTH OF MARIANA ISLANDSEASTERN NEW GUINEA REG., P.N.G.GREECE. ML 1.8 (THE).CHILE-BOLIVIA BORDER REGIONNORTHERN ALASKA. <AEIC>. ML 2.6 (AEIC).NORTH ISLAND, NEW ZEALANDMONTANA. ML 3.9 (GS). MD 3.9 (BUT). Felt (IV) atLincoln and Morysville; (III) at Helnwille and SunRiver; (II) at Helena.TAIWAN REGIONSANTA CRUZ ISLANDSCAPE GIRARDEAU, MISSOURI REGION. <SLM-P>. MD 2.5

Annual Subscriptions: Superintendent of Documents. U.S. Government Printing Office, Washington, D.C. 20402. Back Issues: Books and Open-File Reports Section, U.S. Geological Survey, Box 25425, Denver, CO 80225.

APR 1993 PAGE 2

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(SLM), 2.5 (TEIC). mbLg 2.5 (GS). Felt (IV) atCunnlngham and Kevil, Kentucky. Felt (III) at Barlowand La Center, Kentucky.FIJI ISLANDS REGION. Mw 5.7 (HRV).SOUTHERN GREECE. ML 3.5 (ATM). 3.4 (THE).S I C I LYS I C I LYCAPE GIRARDEAU. MISSOURI REGION. <SLM-P>. MD 2.5(SLM), 2.6 (TEIC). mbLg 2.5 (GS). Felt (IV) atCunnlngham and (III) at Kevil, Kentucky.NORTHWEST TERRITORIES, CANADA. <PGC-P>. mbLg 3.2 (PGC).REPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).SAN JUAN PROVINCE, ARGENTINANEAR COAST OF CENTRAL CHILE. MD 4.2 (SAN).NEAR COAST OF OAXACA, MEXICOSOUTHERN GREECE. ML 3.1 (ATH).CENTRAL CHILE. MD 3.9 (SAN).FRANCE. ML 1.7 (GEN).SOUTHERN NORWAY. MD 1.0 (BER).SOUTHERN XINJIANG, CHINATONGA ISLANDS REGION. Mw 6.0 (GS), 5.9 (HRV). Ms 5.6(BRK). Mo-2.8*10**18 Nm (PPT). Depth from broadbanddisplacement seismog rams.GREECE-ALBANIA BORDER REGION. ML 3.1 (TIR).MINDANAO, PHILIPPINE ISLANDSNEAR WEST COAST OF HONSHU, JAPANTURKEY. MD 2.7 (ISK).SOLOMON ISLANDSWESTERN MEDITERRANEAN SEA. mbLg 3.1 (MDD).NEW IRELAND REGION, P.N.G.CENTRAL ITALYBULGARIANEAR WEST COAST OF HONSHU. JAPANTURKEY. MD 2.9 (ISK).NORTH SEA. MD 3.0 (BER).NORTHWESTERN BALKAN REGION. ML 1.9 (THE), 1.5 (SKO).MARIANA ISLANDS. Mw 5.4 (HRV).ALBANIA. ML 2.7 (SKO), 2.3 (TIR).FIJI ISLANDS REGIONTURKEY. MD 2.8 (ISK).MINAHASSA PENINSULA, SULAWESICHILE-ARGENTINA BORDER REGION. MD 3.9 (SAN).KURIL ISLANDSGREECE. ML 1.5 (THE).GERMANY. MD 2.3 (UCC).VANUATU ISLANDSNEAR COAST OF NICARAGUA. MD 4.5 (APY).NORTH ATLANTIC OCEAN. MD 3.2 (RBA). mbLg 3.0 (MDD).NORTH ATLANTIC OCEAN. Mw 5.2 (HRV).MYANMARMENDOZA PROVINCE, ARGENTINAMYANMAREGYPT. MD 4.1 (HLW).ANDREANOF ISLANDS. ALEUTIAN IS.TURKEY. MD 2.7 (ISK).SOUTHERN ALASKA. <AEIC>.GREECE. ML 3.7 (ATH), 3.7 (THE), 3.6 (SKO).TURKEY. MD 3.4 (ISK).TURKEY. MD 2.7 (ISK).NORTHERN ITALY. ML 1.7 (GEN).SOUTHERN PERUNEW BRITAIN REGION, P.N.G.SOUTHERN CALIFORNIA. <PAS-P>. ML 3.6 (PAS). 3-4 (GS).Felt (III) at Daggett and Yermo.NORTH ATLANTIC OCEANOFF E. COAST OF N. ISLAND, N.Z.SOUTHERN CALIFORNIA. <PAS-P>. ML 2.9 (PAS), 2.7 (GS).NEAR COAST OF GUERRERO, MEXICOFIJI ISLANDS REGIONGULF OF CALIFORNIASTRAIT OF GIBRALTAR. mbLg 2.6 (MDD).NORTHWESTERN BALKAN REGION. ML 2.7 (THE).NORTHWESTERN BALKAN REGION. ML 3.2 (THE). 3.2 (SKO).STRAIT OF GIBRALTAR. mbLg 2.3 (MDD).SOUTHERN XINJIANG, CHINABANDA SEASTRAIT OF GIBRALTAR. mbLg 3.6 (MDD).SOUTHERN ALASKA. <AEIC>. ML 3.0 (AEIC), 3.1 (PMR).MINDORO, PHILIPPINE ISLANDSWINDWARD ISLANDS. MD 3.1 (TRN).ALASKA PENINSULASAN JUAN PROVINCE, ARGENTINA. MD 3.8 (SAN).STRAIT OF GIBRALTAR. mbLg 2.6 (MDD).STRAIT OF GIBRALTAR. mbLg 2.7 (MDD).TURKEY. MD 2.8 (ISK).NORTHERN PERUCENTRAL CALIFORNIA. <BRK>. ML 3.7 (BRK), 3.6 (GS). Felt(IV) ot Prunedale. Also felt in the Hoi Iister-San JuanBaut i sto area.FRANCE. ML 1.9 (LOG).NEW BRITAIN REGION, P.N.G.NEW BRITAIN REGION, P.N.G.KURIL ISLANDS

PAGE 3 APR 1993

03 12 31 54.2 46.593 N 23.746 E 16 G 6.7 16 GREECE. ML 2.7 (THE).03 13 59 57.7% 26.369 S 27.451 E 5 G 0.8 5 REPUBLIC OF SOUTH AFRICA. ML 2.2 (PRE).03 14 11 54.4* 57.846 N 33.468 W 10 G 4.4 3.7 1.4 17 NORTH ATLANTIC OCEAN03 14 37 37.2? 40.67 N 28.94 E 16 G 6.4 4 TURKEY. MD 2.6 (ISK).63 14 39 55.2* 19.983 S 67.653 W 267 3.5 1.2 7 SOUTHERN BOLIVIA03 15 08 31.9? 39.97 N 27.84 E 10 G 6.5 4 TURKEY. MD 2.8 (ISK).63 15 29 34.251 36.896 N 36.228 E 16 G 6.2 6 TURKEY. MD 3.6 (ISK).63 15 29 23.3* 27.228 S 176.453 W 33 N 4.6 1.2 15 KERMADEC ISLANDS REGION03 16 02 42.6? 7.06 S 130.67 E 136 ? 4.2 1.3 13 TANIMBAR ISLANDS REG., INDONESIA63 17 01 56.4 7.221 N 76.995 W 35 4.5 1.2 36 NORTHERN COLOMBIA03 17 56 48.4 26.400 S 27.459 E 5 G 1.1 7 REPUBLIC OF SOUTH AFRICA. ML 2.8 (PRE). mbLg 2.8 (BUL).03 18 18 31.6* 3.890 S 141.419 E 49 ? 4.6 1.3 27 NEW GUINEA, PAPUA NEW GUINEA03 19 01 27.3* 2.678 S 138.632 E 33 N 4.8 3.9 1.1 13 IRI AN JAYA, INDONESIA03 19 14 54.3? 30.52 S 71.63 W 164 ? 0.9 8 NEAR COAST OF CENTRAL CHILE03 19 32 09.5? 8.74 S 118.26 E 33 N 4.5 1.3 12 SUMBAWA REGION, INDONESIA03 20 53 49.74 36.927 N 121.578 W 5 25 CENTRAL CALIFORNIA. <BRK>. ML 3.6 (BRK), 3.2 (GS). Felt

(III) at Aptos. Also felt in the Gilroy area.03 21 00 19.33 26.954 S 26.776 E 5 G 1.17 REPUBLIC OF SOUTH AFRICA. ML 2.5 (PRE).03 21 11 02.8 37.200 N 21.427 E 5 G 3.5 0.9 26 SOUTHERN GREECE. ML 3.8 (THE), 3.7 (ATH).03 21 50 04.2 16.990 N 62.215 W 10 G 0.4 9 LEEWARD ISLANDS. ML 3.0 (FDF). MD 3.1 (TRN).03 22 06 51.8» 37.511 N 21.390 E 10 G 1.3 5 SOUTHERN GREECE. ML 3.2 (ATH).03 22 19 00.3» 9.494 S 111.938 E 33 N 4.3 0.9 6 SOUTH OF JAWA, INDONESIA03 22 44 33.3? 62.05 N 3.84 E 10 G 0.9 10 NORWEGIAN SEA. MD 2.8 (BER).03 22 48 18.4? 39.81 N 19.64 E 10 G 1.2 5 GREECE-ALBANIA BORDER REGION. ML 3.0 (THE).03 23 15 00.7? 17.01 N 62.21 W 10 G 0.1 4 LEEWARD ISLANDS. ML 3.1 (FDF). MD 3.0 (TRN).04 00 13 23.84 63.289 N 145.401 W 6 4.0 65 CENTRAL ALASKA. <AEIC>. ML 3.9 (AEIC), 3.8 (PMR). Felt

at Paxson and Summit Lake.04 00 24 43.8? 44.11 N 6.48 E 10 G 0.6 4 FRANCE. ML 2.0 (LOG).04 00 43 35.7 38.016 N 20.791 E 10 G 1.5 5 GREECE. ML 3.3 (ATH).04 00 53 00.3% 36.785 S 177.576 E 5 G 0.9 6 OFF E. COAST OF N. ISLAND. N.Z. ML 3.8 (WEL).04 01 44 15.4? 17.79 S 69.27 W 157 ? 3.9 1.1 7 PERU-BOLIVIA BORDER REGION04 02 06 06.851 43.180 N 18.148 E 10 G 0.7 9 NORTHWESTERN BALKAN REGION. ML 2.3 (TTG).04 02 52 24.7* 7.567 S 128.548 E 53 ? 4.0 1.2 11 BANDA SEA04 02 57 59.74 61.783 N 147.130 W 37 49 SOUTHERN ALASKA. <AEIC>. ML 2.6 (AEIC).04 04 01 53.9? 5.62 S 146.68 E 219 ? 4.6 1.0 6 EASTERN NEW GUINEA REG., P.N.G.04 04 08 09.9 10.910 N 62.573 W 29 1.3 16 NEAR COAST OF VENEZUELA. MD 3.8 (TRN).04 04 40 02.5? 32.69 S 70.15 W 100 G 0.7 8 CHILE-ARGENTINA BORDER REGION. MD 3.6 (SAN).04 04 46 24.24 63.250 N 151.129 W 14 38 CENTRAL ALASKA. <AEIC>. ML 2.5 (AEIC).04 04 47 24.1 63.157 N 151.169 W 10 G 0.3 8 CENTRAL ALASKA. ML 2.8 (GS).04 05 21 25.24 35.940 N 120.494 W 8 4.0 43 CENTRAL CALIFORNIA. <GM-P>. MD 4.3 (GM). ML A. .3 (BRK).

Felt (V) at Parkfield ond (III) at Avenal. Coalinga, San Miguel and Shandan. Alsa felt at Arroyo Seco, King City and San Luis Obispo.

04 05 39 23.1? 45.39 N 150.92 E 33 N 3.1 1.1 6 KURIL ISLANDS04 06 53 54.6? 37.84 N 26.74 E 5 G 0.3 4 DODECANESE ISLANDS. MD 3.5 (ATH), 3.3 (ISK).04 07 43 27.6 38.559 N 12.805 E 25 » 0.6 11 SICILY04 08 24 53.5% 43.063 N 0.643 W 10 G 0.2 6 PYRENEES. ML 1.0 (STR).04 08 29 33.9 6.756 N 72.937 W 159 D 4.2 1.2 33 NORTHERN COLOMBIA04 09 19 29.2? 16.80 N 100.20 W 33 N 0.7 8 NEAR COAST OF GUERRERO, MEXICO04 09 36 54.3? 8.69 S 121.45 E 236 ? 4.5 1.3 14 FLORES REGION, INDONESIA04 09 42 51.7? 18.94 N 67.22 W 33 N 0.4 7 MONA PASSAGE04 09 45 23.3% 32.336 S 67.492 W 10 G 0.1 5 MENDOZA PROVINCE, ARGENTINA04 10 16 57.3% 39.192 N 27.347 E 10 G 0.4 6 TURKEY. MD 2.8 (ISK).04 11 20 16.3* 27.443 N 99.504 E 10 G 1.2 8 YUNNAN, CHINA. ML 3.6 (BJI).04 11 35 42.8* 18.209 S 69.829 W 149 * 3.5 1.5 10 NORTHERN CHILE04 12 20 51.7% 39.223 N 29.125 E 10 G 0.2 6 TURKEY. MD 2.7 (ISK).04 12 25 22.6? 8.30 N 83.19 W 5 G 1.5 4 COSTA RICA. MD 3.8 (UPA). Felt at Boque;an and David,

Panomo.04 14 52 21.5? 22.14 S 178.04 W 420 G 4.4 0.9 10 SOUTH OF FIJI ISLANDS04 15 26 29.4 34.507 N 27.411 E 73 * 3.8 1.0 12 EASTERN MEDITERRANEAN SEA. MD 4.0 (ATH).04 16 40 44.0* 11.010 N 62.063 W 132 ? 0.6 12 WINDWARD ISLANDS. MD 3.5 (TRN).04 16 48 59.0* 40.677 N 23.402 E 10 G 0.4 5 GREECE. ML 2.0 (THE),

a 04 17 21 36.2 53.443 N 164.520 W 33 N 5.0 4.8 1.0 159 UNIMAK ISLAND REGION. Mw 5.4 (HRV). ML 5.2 (PMR).04 17 31 29.44 39.170 N 76.800 W 5 G 3 CHESAPEAKE BAY REGION. <MACRO>. MD 1.5 (NED). Felt in

the Columbia, Maryland area.04 18 09 19.84 33.695 N 118.370 W 4 5 SOUTHERN CALIFORNIA. <PAS-P>. ML 3.0 (PAS). Felt.04 18 11 49.4? 10.46 N 61.54 W 33 N 0.4 4 TRINIDAD. MD 2.8 (TRN).04 18 20 52.1* 13.873 S 34.461 E 10 G 4.6 1.4 10 MALAWI. mbLg 4.3 (BUL).04 19 54 55.4* 34.764 S 179.097 E 129 ? 4.8 1.3 25 SOUTH OF KERMADEC ISLANDS04 20 25 26.1? 23.57 S 68.31 W 224 3.2 0.4 7 NORTHERN CHILE04 21 07 57.1 40.665 N 23.427 E 10 G 0.4 8 GREECE. ML 2.2 (THE).04 21 41 52.0% 40.650 N 22.410 E 10 G 0.3 6 GREECE. ML 1.8 (THE).04 21 46 46.5 7.508 S 128.295 E 33 N 4.9 1.0 32 BANDA SEA04 22 19 07.3* 11.238 N 86.349 W 164 3.4 0.5 11 NEAR COAST OF NICARAGUA04 22 49 36.7? 34.98 S 71.83 W 33 N 0.3 7 NEAR COAST OF CENTRAL CHILE. MD 3.7 (SAN).04 22 58 25.1* 9.329 S 107.322 E 33 N 4.8 1.3 16 SOUTH OF JAWA, INDONESIA

a 04 23 05 17.7 13.383 N 120.551 E 62 5.4 0.9 168 MINDORO, PHILIPPINE ISLANDS. Mw 5.1 (HRV). Felt (IIIRF) on M i ndo ro.

04 23 58 29.9 71.539 N 4.989 W 10 G 4.3 1.2 13 JAN MAYEN ISLAND REGION05 00 10 38.1% 38.587 S 175.723 E 208 0.5 31 NORTH ISLAND. NEW ZEALAND05 00 12 33.7? 36.95 S 176.72 E 316 ? 0.6 30 OFF E. COAST OF N. ISLAND. N.Z.05 00 56 30.7 45.887 N 9.892 E 8 1.3 51 NORTHERN ITALY. MD 3.1 (LJU). ML 3.0 (STR), 2.9 (LOG),

2.5 (VIE).05 00 59 03.3 49.963 N 8.551 E 10 G 1.1 10 GERMANY. ML 2.6 (LOG).05 01 25 35.1% 37.383 N 2.168 W 10 G 1.0 16 SPAIN. mbLg 3.4 (MOD). Felt (IV) in the Cantaria area.05 01 29 31.7? 22.86 S 178.38 W 420 G 4.2 1.1 19 SOUTH OF FIJI ISLANDS05 01 57 30.8 20.410 S 67.905 E 10 G 5.2 4.4 0.8 23 MID-1NDI AN RIDGE05 02 23 51.6? 36.39 N 26.98 E 10 G 0.6 5 DODECANESE ISLANDS. MD 3.3 (ISK).05 02 27 31.8* 17.810 N 61.504 W 33 N 3.5 1-3 11 LEEWARD ISLANDS. ML 3.6 (FDF). MD 3.5 (TRN).05 03 15 54.0? 7.00 N 72.66 W 207 ? 3.9 0.9 7 NORTHERN COLOMBIA05 03 36 58.4* 59.923 N 5.620 E 10 G 0.8 5 SOUTHERN NORWAY. MD 1.5 (8ER).

f 05 04 00 05.3 59.801 S 26.312 W 33 N 6.0 6.2 0.9 246 SOUTH SANDWICH ISLANDS REGION. Mw 6.3 (GS), 6.2 (HRV).Mo-2.7»10»*l8 Nm (PPT).

APR 1993 PAGE 4

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SOUTH SANDWICH ISLANDS REGIONSOUTH SANDWICH ISLANDS REGIONSOUTH SANDWICH ISLANDS REGIONSOUTH SANDWICH ISLANDS REGIONGREECE. ML 2.4 (THE).SOUTH SANDWICH ISLANDS REGIONSOUTH SANDWICH ISLANDS REGIONSOUTH SANDWICH ISLANDS REGIONNORTHERN CHILENEW GUINEA, PAPUA NEW GUINEASOUTHEAST INDIAN RIDGENORTH ATLANTIC OCEAN. Mw 5.3 (HRV).NORTH ISLAND, NEW ZEALANDCOSTA RICA. Felt at San Jose and in the Central Valley.Also felt at Baja Boquete and Chiriqui Grande, Panama.BAJA CALIFORNIA, MEXICO. ML 4.6 (GS).SOUTH SANDWICH ISLANDS REGIONGREECE. ML 2.2 (THE).CENTRAL ITALYREPUBLIC OF SOUTH AFRICA. ML 2.4 (PRE).SOUTH SANDWICH ISLANDS REGIONJUJUY PROVINCE, ARGENTINANORTHERN ITALY. ML 1.7 (GEN).NORTHERN ITALY. MD 2.7 (LJU). ML 2.3 (VIE).JUJUY PROVINCE, ARGENTINATURKEY. MD 2.7 ( ISK).TURKEY. MD 2.7 (ISK).REPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).NEAR SOUTH COAST OF FRANCE. ML 2.8 (STR).NORTH ISLAND, NEW ZEALANDSOUTHERN NORWAY. MD 2.4 (BER).EASTERN NEW GUINEA REG., P.N.G.GREECE. ML 3.6 (ATH), 2.7 (THE).NORTHWESTERN BALKAN REGION. ML 3.5 (VIE), 3.4 (LDG). MD3.6 (LJU), 3.2 (TRI). F«It on Krk Island and at S«njand Crikvenica, Croatia.SOUTH SANDWICH ISLANDS REGION. Mw 5.7 (HRV).MARIANA ISLANDS REGIONWESTERN AUSTRALIANEAR SOUTH COAST OF FRANCE. ML 2.6 (STR).SOUTHERN ALASKA. <AEIC>. ML 4.1 (AEIC), 4.2 (PMR), 4.5(PGC).CHILE-ARGENTINA BORDER REGION. MD 3.8 (SAN).GERMANY. ML 2.5 (STR) .NORTHERN ITALY. ML 2.6 (GEN).SOUTH SANDWICH ISLANDS REGIONNEAR WEST COAST OF COLOMBIABANDA SEASOUTHERN ALASKA. <AEIC>. ML 2.7 (AEIC). 3.1 (PGC).SOUTHERN ITALY. ML 4.2 (TTG). 3.9 (THE).COOK STRAIT, NEW ZEALANDSAN JUAN PROVINCE. ARGENTINACHIAPAS. MEXICOKURIL ISLANDS. Mw 5.2 (HRV).NEAR COAST OF NICARAGUATURKEY. MD 3.1 (ISK ) .TIMOR REGION, INDONESIAALBANIA. ML 2.4 (THE).NORTHERN COLOMBIA. MD 4.2 (UPA).REPUBLIC OF SOUTH AFRICA. ML 2.8 (PRE). mbLg 2.8 (BUL).NORTH ISLAND. NEW ZEALANDOAXACA, MEXICONORTHERN ITALY. ML 2.2 (GEN).LEEWARD ISLANDS. MD 3.9 (TRN).NORTH SEA. ML 3.5 (8GS). MD 3.3 (BER).TURKEY. MD 2.8 ( ISK).FIJI ISLANDS REGIONTURKEY. MD 2.7 (ISK).MINDANAO. PHILIPPINE ISLANDSKURIL ISLANDSGREECE. ML 2.5 (THE).WASHINGTON-OREGON BORDER REGION. <SEA-P>. MD 2.2 (SEA).Felt in the epicentre! area.TONGA ISLANDSTURKEY. ML 3.8 (THE). MD 3.6 (ISK).GREECE-BULGARIA BORDER REGIONGREECE. ML 2.4 (THE).NORTHWEST TERRITORIES, CANADATURKEY. MD 3.2 (ISK).REPUBLIC OF SOUTH AFRICA. ML 2.5 (PRE).REPUBLIC OF SOUTH AFRICATURKEY. MD 2.7 (ISK).TURKEY. MD 2.8 ( ISK) .SANTA CRUZ ISLANDSCENTRAL ITALYTURKEY. MD 2.8 ( ISK) .CENTRAL ITALYDODECANESE ISLANDS. MD 4.1 (HLW)SWEDENNORTHWESTERN BALKAN REGIONNEAR COAST OF NORTHERN CALIF. <GM-P>TRINIDAD. MD 3.5 (TRN).LA RIOJA PROVINCE, ARGENTINA

3.8 (ATH).

ML 2.3 (THE). 1.9 (SKO). MD 2.9 (GM).

PAGE 5 APR 1993

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SOUTHERN GREECE. ML 3.3 (ATH).REPUBLIC OF SOUTH AFRICA. mbLg 4.3 (BUL). Felt widelyin central Transvaal.SOUTHERN NORWAY. MO 1.8 (BER).SOUTH OF FIJI ISLANDSTONGA ISLANDSFRANCE. ML 1.7 (LOG).GREECE-BULGARIA BORDER REGION. ML 2.1 (SKO).NORTHERN MOLUCCA SEAWESTERN AUSTRALIASOUTHERN ALASKA. <AEIC>. ML 3.3 (AEIC), 3.4 (PGC).TURKEY. MD 3.8 (ISK). F«It in the Ankara area.REPUBLIC OF SOUTH AFRICA. ML 3.8 (PRE).SOUTHERN ALASKA. <AEIC>. ML 2.9 (AEIC). 3.1 (PGC).SOUTH OF KERMADEC ISLANDSCENTRAL ITALY. ML 3.1 (LOG). MD 3.0 (FIR). 2.9 (TRl).FRANCE. ML 1.6 (GEN).NORTHWESTERN BALKAN REGION. ML 4.1 (ZAG). 3.9 (ROM).3.9 (TIR). 3.8 (VIE). MD 4.2 (TRl), 4.1 (LJU), 4.8(TTG). Felt along the coast of Croatia from Imotski toDubrovnik. Also felt ot Crude, Bosnia-Herzegovina.REPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).NORTHWESTERN BALKAN REGION. ML 3.4 (TTG). 3.2 (ROM). MD3.5 (LJU).NORTHWESTERN BALKAN REGION. ML 2.6 (TTG).AEGEAN SEA. ML 3.4 (THE). MD 3.5 (ISK), 3.2 (ATH).NORTHWESTERN BALKAN REGION. ML 2.1 (TTG).SOUTHERN SUMATERA, INDONESIACENTRAL PERUTURKEY. MD 3.2 (ISK).ANDREANOF ISLANDS, ALEUTIAN IS.SOUTHERN ALASKA. <AEIC>.SOUTH ISLAND, NEW ZEALANDDODECANESE ISLANDS. MD 4.2 (HLW).CENTRAL ALASKA. ML 2.8 (PMR).NORTHERN COLOMBIAWASHINGTON-OREGON BORDER REGION. <SEA-P>. MD 2.4 (SEA).SOUTH OF HONSHU. JAPANGREECE. ML 2.4 (THE).NORTHERN COLOMBIANEAR COAST OF NORTHERN CHILE. Felt (IV) at Putre; (III)ot Iquique and Cuya. Landslides occurred along the A5highway. Also felt (IV) ot Tocna, Peru.OFF COAST OF CALIFORNIA. <PAS-P>. ML 3.5 (PAS).REPUBLIC OF SOUTH AFRICA. ML 2.7 (PRE).REPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).JUJUY PROVINCE. ARGENTINATAIWAN REGION. ML 4.4 (BJ I ) .KURIL ISLANDSPANAMA-COLOMBIA BORDER REGION. MD 4.2 (UPA).CENTRAL ALASKA. <AEIC>. ML 2.5 (AEIC). 3.8 (PMR).GREECE. ML 2.2 (THE).NORTHERN COLOMBIA. MD 4.7 (UPA).TURKEY. MD 2.7 ( ISK).TURKEY. MD 2.8 ( ISK) .SOUTH INDIAN OCEAN. Mw 5.2 (HRV).GREECE. ML 1.8 (THE).CRETE. MD 4.4 (HLW), 4.3 (ATH).MINAHASSA PENINSULA, SULAWESIPUERTO RICO REGIONKODIAK ISLAND REGION. <AEIC>. ML 2.9 (AEIC).FRANCE. ML 1.7 (STR).TURKEY. MD 2.9 (ISK).OFF COAST OF OREGONEASTERN NEW GUINEA REG., P.N.G.TURKEY. MD 2.7 (ISK).NORTHERN ITALY. ML 2.4 (LOG), 2.2 (GEN).CENTRAL ITALYNORTHERN COLOMBIAVANUATU ISLANDSANDREANOF ISLANDS. ALEUTIAN IS.GREECE-BULGARIA BORDER REGION. ML 1.7 (THE).NEAR N COAST OF NEW GUINEA, PNG.FRANCE. ML 1.5 (GEN).NORTHERN ITALY. ML 1.4 (GEN).REPUBLIC OF SOUTH AFRICA. ML 2.4 (PRE).MARIANA ISLANDSNORTHWESTERN BALKAN REGION. ML 1.9 (TTG).SOUTHERN CALIFORNIA. <PAS-P>. ML 3.8 (PAS).POLAND. ML 3.6 (GRF). 3.6 (VIE).NEAR COAST OF CENTRAL CHILE. MD 3.7 (SAN).NORTHWESTERN BALKAN REGION. MD 3.4 (LJU). Felt on KrkIsI and, Croat ia.OFF COAST OF NORTHERN CALIFORNIASOUTHERN ALASKA. <AEIC>.OFF COAST OF CENTRAL AMERICA. MD 4.1 (APY).GREECE-ALBANIA BORDER REGION. ML 2.8 (THE).SOUTHERN CALIFORNIA. <PAS-P>. ML 2.8 (PAS).PANAMA-COLOMBIA BORDER REGION. MD 4.6 (UPA).OFF COAST OF CALIFORNIA. <PAS-P>. ML 3.7 (PAS).GERMANY. ML 2.5 (STR), 2.3 (UCC).AFGHANISTAN-TAJIKISTAN 80RD REG.SOUTH OF TONGA ISLANDS. Mw 5.2 (HRV).

APR 1993 PAGE 6

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OFF COAST OF CENTRAL AMERICA. MD 4.5 (GCG), 4.2 (APY).AEGEAN SEAOFF COAST OF OREGONCENTRAL CALIFORNIA. <GM-P>. MD 3.2 (GM). ML 3.1 (PAS),3.0 (GS).OFF COAST OF CENTRAL AMERICA. MD 4.2 (GCG).TURKEY. MD 2.8 (ISK).REPUBLIC OF SOUTH AFRICA. ML 2.1 (PRE).EASTERN KASHMIR. Mw 5.2 (HRV).KENAI PENINSULA, ALASKA. <AEIC>. ML 2.7 (AEIC).NEAR COAST OF CENTRAL CHILE. MD 4.0 (SAN).REPUBLIC OF SOUTH AFRICA. ML 2.2 (PRE).POLAND. ML 3.0 (WAR).EASTERN KASHMIRCHILE-ARGENTINA BORDER REGION. MD 4.1 (SAN).NORTHERN MOLUCCA SEAGERMANY. ML 2.5 (STR), 2.4 (UCC).WASHINGTON-OREGON BORDER REGION. <SEA-P>. MD 2.0 (SEA).EASTERN KASHMIRSOUTH OF KERMADEC ISLANDSLEEWARD ISLANDS. ML 3.0 (FDF). MD 3.3 (TRN).NEAR COAST OF GUERRERO, MEXICOCHESAPEAKE BAY REGION. <MACRO>. Felt at Columbia,Mary I and.SOUTHERN ALASKA. <AEIC>. ML 2.7 (AEIC).NORTHWESTERN IRAN. Several peaple injured in theSorob-ArdabiI area.REPUBLIC OF SOUTH AFRICA. ML 2.2 (PRE).GREECE. ML 2.2 (THE).REPUBLIC OF SOUTH AFRICAALASKA PENINSULA. <AEIC>FIJI ISLANDS REGIONOAXACA, MEXICOTURKEY. MD 2.8 (ISK).NORTHWESTERN BALKAN REGION. ML 2.3 (SKO), 2.2 (THE)SOUTHERN CALIFORNIA. <PAS-P>. ML 3.0 (PAS). Felt.WESTERN AUSTRALIASULAWESI, INDONESIA. Mw 5.4 (HRV).AUSTRIA. ML 1.6 (VIE).GREECE. ML 1.7 (THE).SOUTH OF AUSTRALIATURKEY. MD 2.5 (ISK).NORTH ISLAND, NEW ZEALANDNEAR COAST OF CENTRAL CHILE. Felt (IV) in theTolcahuono area.NORTHERN ITALYNORTHERN ITALYTURKEY. MD 2.9 ( ISK).IONIAN SEA. ML 3.5 (ATH).AEGEAN SEA. ML 3.6 (ATH). MD 3.5 (ISK).GREECE. ML 1.3 (THE).SOUTHERN GREECE. ML 3.5 (ATH).GREECE-BULGARIA BORDER REGION. ML 1.8 (THE).OFF E. COAST OF S. ISLAND, N.ZDOMINICAN REPUBLIC REGION. Mwthe Borohona area.GREECE-ALBANIA BORDER REGION. ML 2.6 (THE).SULU ARCHIPELAGO. Mw 5.2 (HRV).SOUTHERN CALIFORNIA. <PAS-P>. ML 3.2 (PAS). Felt.SOUTHERN ALASKA. <AEIC>.EASTERN KASHMIRLOYALTY ISLANDSSAN JUAN PROVINCE, ARGENTINATIMOR REGION, INDONESIAGREECE. ML 2.4 (THE).SICHUAN, CHINA. ML 4.1 (BJI).ALBANIA. ML 2.2 (TTG).OFF COAST OF CENTRAL AMERICASWITZERLAND. ML 2.0 (LOG).SWITZERLAND. ML 2.7 (LOG).NORTHERN ALASKA. ML 2.6 (AEIC).EASTERN KASHMIRTURKEY. MD 3.2 (ISK).NEAR COAST OF NICARAGUALEEWARD ISLANDSHALMAHERA. INDONESIAPOLAND. ML 4.1 (GRF), 4.0 (VIE).LEEWARD ISLANDSGERMANY. ML 2.6 (STR). 2.3 (UCC).SOUTH OF MARIANA ISLANDSSOLOMON ISLANDSTURKEY. MD 3.1 (ISK).SOUTHERN MID-ATLANTIC RIDGEREPUBLIC OF SOUTH AFRICA. ML 2.8 (PRE).TUNISIA. mbLg 3.8 (MDD).NORTH ISLAND, NEW ZEALANDCALIFORNIA-NEVADA BORDER REGIONSOUTH OF HONSHU. JAPANSAN JUAN PROVINCE, ARGENTINASOUTHERN IRANSOUTHERN ALASKA. <AEIC>.KODIAK ISLAND REGIONLUZON, PHILIPPINE ISLANDS. Mw 5.6 (HRV). Felt strongly

ML 4.0 (WEL). 5.2 (HRV). Felt widely in

MD 4.3 (APY), 4.3 (GCG).

<GM-P>. MD 3.1 (GM)

PAGE 7 APR 1993

09 12 00 15.3* 13.324 N09 12 16 64.6% 40.843 N69 12 13 69.8? 39.19 N69 12 24 45.6% 46.895 N69 12 29 19.1* 28.811 N

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in the AngeIes Olongopo oreo. Felt (III RF) ot Tagaytayand (II RF) ot Quezon City.LUZON, PHILIPPINE ISLANDSTURKEY. MD 2.7 (ISK).TURKEY. MD 2.7 (ISK).GREECE. ML 1.9 (THE).SOUTHERN TEXAS. mbLg 4.3 (GS). Slight damage (V) in theCampbeiI tan Fashing area. Felt (IV) at Calliham,Christine, McCoy, Peggy, Three Rivers and Whltsett;(III) at Charlotte, Cay City, Hobson, SutherlandSprings and Tllden. Also felt at Converse, Jourdantonand Pleasanton. Felt in parts af Atascosa, Bexar,Karnes, Live Oak, McMullen and Wilson Counties.BULGARIA. ML 2.5 (THE).PUERTO RICO REGIONNORTHERN ITALY. ML 2.4 (LOG).LUZON, PHILIPPINE ISLANDSGREECE. ML 3.2 (THE).SICHUAN. CHINA. ML 4.2 (BJI).NORTHERN ITALY. ML 2.0 (GEN).CANARY ISLANDS REGION. mbLg 3.1 (MOD). Felt (III) atCaI Iao Salvaje, Tenerlfe.CHILE-ARGENTINA BORDER REGIONANDAMAN ISLANDS. INDIATURKEY. MD 3.2 (ISK).NORTHWESTERN BALKAN REGION. ML 3.1 (TTG).MENDOZA PROVINCE, ARGENTINA. MD 4.4 (SAN).REPUBLIC OF SOUTH AFRICA. ML 2.2 (PRE).NORTHERN ITALY. ML 3.5 (GRF), 3.2 (VIE).SOUTH OF HONSHU, JAPANBANDA SEATURKEY. MD 2.8 (ISK).CENTRAL CALIFORNIA. <GM-P>.CZECH AND SLOVAK REPUBLICS.XIZANGSAVU SEAROMANIANEAR N CDAST OF NEW GUINEA,NORTHERN CALIFORNIA. <GM-P>BANDA SEASOUTH OF FIJI ISLANDSSOUTH INDIAN OCEANSOUTH OF PANAMA. MD 4.2 (UPA)CHILE-ARGENTINA BORDER REGIONNEW BRITAIN REGION, P.N.G. ML 4.2NORTH ISLAND, NEW ZEALANDPYRENEES. MD 3.2 (BTH). mbLg 3.0 (MDD). ML 2.8 (LOG).NORTHERN CHILETURKEY. MD 2.8 (ISK).NORTHERN ITALY. ML 2.6 (GEN), 2.4 (LOG).POLAND. ML 3.6 (WAR).UNIMAK ISLAND REGIONSICHUAN, CHINA. ML 4.4 (BJI).SICILYYUNNAN. CHINA. ML 3.8 (BJI).OFF COAST OF ECUADORTURKEY. MD 2.9 (ISK).CENTRAL ALASKA. <AEIC>. ML 2.7 (AEIC), 2.8 (PMR).CENTRAL ALASKA. <AEIC>.ANDREANOF ISLANDS, ALEUTIAN IS.SOUTHERN MOLUCCA SEANEAR COAST OF GUERRERO. MEXICOCue r rero.REPUBLIC OF SOUTH AFRICA. ML 2SPAIN. mbLg 3.1 (MDD).CENTRAL CALIFORNIA. <GM-P>. MDTURKEY. MD 2.7 (ISK).TIMOR REGION, INDONESIASOUTHERN MOLUCCA SEA. Mw 5.4 (HRV).TURKEY. MD 2.8 (ISK).NEAR COAST OF CENTRAL CHILE. MD 4.0 (SAN).OFF COAST OF OREGONNEAR COAST OF NICARAGUA. MD 4.0 (APY).NORTH ATLANTIC OCEANSAN JUAN PROVINCE, ARGENTINATURKEY. MD 2.9 (ISK).TURKEY. MD 2.6 (ISK).PACIFIC-ANTARCTIC RIDGE. Mw 5.5 (HRV).KODIAK ISLAND REGION. ML 3.4 (PMR).CENTRAL ALASKA. <AEIC>.TURKEY. MD 2.8 (ISK).TALAUD ISLANDS, INDONESIATURKEY. MD 2.7GREECE. ML 3.2NORTHERN ITALY.TURKEY. MD 2.9 (ISK)JAWA, INDONESIABULGARIA. ML 2.9 (THE). Felt (III) in the Dimitrovgrodarea.SOUTH OF KERMADEC ISLANDSPYRENEES. ML 3.2 (LDG). mbLg 3.2 (MDD).NORTHERN ITALY. ML 1.6 (GEN).REPUBLIC OF SOUTH AFRICA. ML 2.7 (PRE).

. Felt in southeastern

.3 (PRE).

2.9 (GM).

(ISK) (THE) MD 3.1 (ATH).ML 3.2 (LDG), 2.6 (GEN).

APR 1993 PAGE 8

18 19 45 58.4* 38.429 N 22.864 E 18 G 8.6 18 GREECE. ML 2.7 (THE).18 28 81 46.24 62.554 N 152.581 W 139 3.1 49 CENTRAL ALASKA. <AEIC>.18 28 81 44.4 8.876 S 75.148 W 134 D 4.7 1.8 68 CENTRAL PERU18 28 21 56.5* 31.565 S 69.658 W 141 ? 8.7 18 SAN JUAN PROVINCE, ARGENTINA. MD 4.8 (SAN).18 28 34 51.8* 23.548 S 179.281 W 538 G 4.6 8.4 17 SOUTH OF FIJI ISLANDS18 28 46 88.7* 19.919 S 174.883 W 26 D 4.6 8.8 16 TONGA ISLANDS

a 18 21 81 26.5 22.571 S 68.948 W 116 D 5.1 1.4 95 NORTHERN CHILE. Mw 5.3 (HRV).18 21 29 26.5X 28.676 S 67.617 W 33 N 8.4 5 LA RIOJA PROVINCE, ARGENTINA18 21 47 58.9 22.757 S 68.742 W 183 D 5.8 1.3 53 NORTHERN CHILE18 22 32 24.7 53.685 N 35.282 W 18 G 4.6 3.9 8.9 38 NORTH ATLANTIC OCEAN18 23 32 42.8X 48.545 N 23.488 E 18 G 8.3 5 GREECE. ML 1.6 (THE).11 88 63 24.7 48.347 N 126.398 W 18 G 8.7 22 OFF COAST OF NORTHERN CALIFORNIA. MD 3.5 (GM).11 88 49 11.4? 17.64 S 168.43 E 33 N 4.4 1.1 7 VANUATU ISLANDS11 81 45 47.3* 6.876 S 158.382 E 61 * 4.2 1.2 9 NEW BRITAIN REGION. P.N.G.11 81 49 23.2? 6.82 S 158.56 E 33 N 4.3 1.8 8 NEW BRITAIN REGION, P.N.G.11 83 82 43.9* 15.866 N 128.328 E 33 N 4.3 8.8 7 LUZON, PHILIPPINE ISLANDS11 83 85 18.1 44.889 N 6.778 E 18 G 8.7 12 FRANCE. ML 2.1 (LDG). 1.6 (GEN).11 83 18 35.34 58.375 N 153.258 W 59 2.9 41 KODIAK ISLAND REGION. <AEIC>. ML 2.9 (AEIC).

a 11 85 88 89.5 1.369 N 126.183 E 58 5.2 1.1 144 NORTHERN MOLUCCA SEA. Mw 5.3 (HRV).11 85 34 27.9 23.926 N 94.126 E 75 4.6 1.2 67 MYANMAR-1 NO IA BORDER REGION11 85 49 18.8? 9.92 N 125.32 E 123 * 4.1 1.3 9 MINDANAO, PHILIPPINE ISLANDS

a 11 86 88 56.4 51.287 N 178.599 W 33 N 5.6 4.8 8.9 481 ANDREANOF ISLANDS, ALEUTIAN IS. Mw 5.4 (HRV). ML 5.1(PMR).

11 86 83 38.8? 48.79 N 38.46 E 18 G 8.9 5 TURKEY. MD 2.8 (ISK).a 11 86 59 48.1 39.744 S 176.542 E 33 D 5.5 5.5 1.3 113 NORTH ISLAND, NEW ZEALAND. Mw 5.7 (HRV). ML 6.2 (WEL).

Felt in the Napier-WeI Iingtan area.11 87 84 12.3 22.428 N 144.912 E 33 N 4.8 4.5 1.3 63 VOLCANO ISLANDS REGION11 87 11 59.3? 1.33 N 126.16 E 73 ? 4.7 1.8 12 NORTHERN MOLUCCA SEA11 87 16 33.74 61.429 N 158.854 W 47 46 SOUTHERN ALASKA. <AEIC>. ML 2.7 (AEIC).11 87 23 36.7* 17.131 S 179.885 W 573 4.8 8.5 28 FIJI ISLANDS REGION11 87 56 82.9? 39.11 N 27.68 E 18 G 8.7 4 TURKEY. MD 2.8 (ISK).11 18 86 18.3? 13.29 N 122.88 E 33 N 1.2 4 LUZON, PHILIPPINE ISLANDS11 18 15 49.8 47.649 N 27.488 W 18 G 4.6 1.8 79 NORTHERN MID-ATLANTIC RIDGE11 18 21 33.3% 11.436 N 61.522 W 18 G 1.8 11 WINDWARD ISLANDS. MD 3.4 (TRN).11 16 33 32.2 42.639 N 142.385 E 135 4.7 8.8 114 HOKKAIDO, JAPAN REGION11 18 52 83.44 34.145 N 116.723 W 5 18 SOUTHERN CALIFORNIA. <PAS-P>. ML 3.8 (PAS).11 18 58 85.8? 18.78 S 177.84 W 588 G 4.8 1.1 8 FIJI ISLANDS REGION

a 11 11 18 38.3 8.833 N 123.825 E 284 D 5.4 1.1 226 MINAHASSA PENINSULA, SULAWESI. Mw 5.4 (HRV).11 12 18 59.4? 39.87 N 27.65 E 16 G 8.3 4 TURKEY. MD 2.7 (ISK).11 13 83 36.5? 18.23 N 61.16 W 68 G 8.5 4 TRINIDAD. MD 2.6 (TRN).11 13 13 53.8* 4.729 S 152.519 E 99 ? 4.7 1.8 31 NEW BRITAIN REGION. P.N.G.11 13 25 26.4 38.635 N 23.861 E 18 G 1.2 15 GREECE. MD 3.2 (ATH).11 13 25 37.1? 7.49 S 136.37 E 33 N 8.6 4 TANIMBAR ISLANDS REG., INDONESIA11 14 57 46.8% 44.354 N 7.279 E 5 G 8.4 18 NORTHERN ITALY. ML 2.2 (GEN).11 15 55 38.4? 39.11 N 27.64 E 18 G 8.3 4 TURKEY. MD 2.8 (ISK).11 16 85 58.3 32.142 N 48.321 W 18 G 5.6 4.5 8.8 186 NORTHERN MID-ATLANTIC RIDGE11 17 84 18.2* 37.649 N 21.271 E 18 G 1.4 18 SOUTHERN GREECE. MD 3.3 (ATH). ML 3.2 (THE).11 17 17 14.7*. 8.319 S 188.181 E 77 4.4 1.1 7 JAWA, INDONESIA11 17 48 57.9? 11.48 N 62.77 W 33 N 3.8 1.3 5 WINDWARD ISLANDS. MD 3.3 (TRN).11 19 35 28.1 15.114 N 123.845 E 28 D 4.6 4.2 1.2 58 PHILIPPINE ISLANDS REGION11 19 41 42.4 3.846 S 35.638 E 28 D 5.3 1.8 138 TANZANIA11 19 47 43.54 34.143 N 116.875 W 8 12 SOUTHERN CALIFORNIA. <PAS-P>. ML 3.1 (PAS), 2.8 (GS).11 19 51 13.9 48.359 N 23.919 E 18 G 8.6 6 GREECE11 28 14 57.8* 68,167 N 15.286 E 18 G 1.1 6 SWEDEN. MD 3.7 (BER). Felt.11 28 38 33.6 51.433 N 179.861 W 33 N 4.7 1.1 66 ANDREANOF ISLANDS, ALEUTIAN IS. Felt (III) on Amchltka.11 21 88 88.6X 44.672 N 6.818 E 18 G 8.1 8 FRANCE. ML 2.1 (GEN).11 21 58 88.7? 17.58 N 94.93 W 148 ? 3.7 1.2 18 CHIAPAS. MEXICO11 22 37 39.2? 36.58 S 73.34 W 33 N 4.9 1.4 15 NEAR COAST OF CENTRAL CHILE11 23 22 49.2 78.181 N 126.128 E 18 G 4.8 6.8 58 EAST OF SEVERNAYA ZEMLYA, RUSSIA11 23 24 46.8 41.574 N 24.111 E 18 G 1.2 13 GREECE-BULGARIA BORDER REGION11 23 25 37.8* 29.877 N 58.919 E 42 4.5 1.1 46 SOUTHERN IRAN. Felt at Gach Saran.12 88 36 46.6? 27.92 N 188.98 E 18 G 3.8 1.6 6 YUNNAN, CHINA. ML 3.7 (BJI).12 88 47 33.1? 18.12 N 67.33 W 18 G 8.7 7 MONA PASSAGE12 86 57 57.9* 28.314 N 82.799 E 33 N 4.7 1.4 15 NEPAL12 81 82 16.9? 38.83 N 166.99 E 18 G 1.7 5 WESTERN NEI MONGOL. CHINA. ML 3.3 (BJI).12 81 23 87.1 37.969 N 28.988 E 18 G 3.1 8.9 24 IONIAN SEA. MD 3.4 (ATH).12 81 56 46.4% 48.821 N 28.763 E 18 G 8.7 8 TURKEY. MD 2.9 (ISK).12 83 13 83.2% 39.125 N 28.732 E 18 G 8.5 8 TURKEY. MD 2.9 (ISK).12 83 23 56.7 48.817 N 28.914 E 18 G 8.9 11 GREECE-ALBANIA BORDER REGION. MD 3.6 (ATH). ML 2.6

(SKO).12 83 48 18.6 28.784 N 95.388 E 17 D 4.5 1.2 24 EASTERN XIZANG-INDIA BORDER REG. ML 3.8 (BJI).12 84 88 39.8? 13.51 N 94.81 W 33 N 3.4 8.4 5 OFF COAST OF CHIAPAS, MEXICO12 84 23 22.1* 38.436 S 71.165 W 189 * 4.5 1.1 16 NEAR COAST OF CENTRAL CHILE. Felt (III) at Combarbala.

Monte Patria and Ovalle; (II) at Caquimba, I I lapel andLa Serena.

12 84 38 42.8? 15.42 N 62.39 W 33 N 1.2 6 LEEWARD ISLANDS. ML 3.8 (FDF).12 85 36 46.4% 42.712 N 12.678 E 18 G 8.5 5 CENTRAL ITALY12 86 46 58.3? 46.44 N 13.86 E 18 G 8.1 4 AUSTRIA. ML 1.5 (VIE).12 86 47 13.2? 22.98 S 169.77 E 33 N 4.1 1.4 5 LOYALTY ISLANDS REGION12 86 54 43.6* 28.838 N 188.842 E 18 G 4.2 1.5 7 SICHUAN. CHINA. ML 4.1 (BJI).12 87 45 36.2* 24.849 S 179.795 E 517 4.6 1.2 41 SOUTH OF FIJI ISLANDS12 87 53 26.4? 32.94 S 178.65 W 33 N 4.4 8.9 7 SOUTH OF KERMADEC ISLANDS12 88 21 25.9? 47.61 N 8.88 W 18 G 1.8 11 FRANCE. ML 3.8 (LDG).12 88 31 25.34 64.369 N 147.312 W 8 27 CENTRAL ALASKA. <AEIC>. ML 2.7 (AEIC).12 88 32 27.4& 34.144 N 116.877 W 8 18 SOUTHERN CALIFORNIA. <PAS-P>. ML 3.2 (PAS). 3.8 (GS).

Fel t .12 88 56 24.1? 32.95 S 178.B4 W 33 N 4.4 1.5 8 SOUTH OF KERMADEC ISLANDS12 89 36 24.7% 39.216 N 27.725 E 18 G 8.5 5 TURKEY. MD 2.7 (ISK).12 89 44 38.4 39.218 N 22.834 E 18 G 8.6 7 GREECE12 89 54 87.6 38.231 N 72.361 E 22 D 4.6 1.2 28 TAJIKISTAN12 18 85 12. 7% 39.263 N 22.874 E 21 8.6 6 GREECE12 16 33 28.2? 41.62 N 23.58 E 18 G 8.2 5 GREECE-BULGARIA BORDER REGION12 18 42 86.8? 38.41 S 68.83 W 33 N 1.5 5 SAN JUAN PROVINCE. ARGENTINA

PAGE 9 APR 1993

12 10 56 44.44 32.792 N 116.116 W 3 5 CALIF.-BAJA CALIF. BORDER REGION. <PAS-P>. ML 3.1(PAS). Felt at Ocotillo. California.

12 11 18 32.84 34.143 N 116.875 W 6 G 14 SOUTHERN CALIFORNIA. <PAS-P>. ML 3.3 (PAS). 3.1 (GS).Fel t.

12 11 25 54.7 6.648 S 138.437 E 37 4.8 5.2 1.2 59 BANDA SEA12 11 37 46.6* 60.193 S 151.604 E 10 G 4.5 1.1 12 WEST OF MACOUARIE ISLAND12 12 22 36.9? 4.07 S 133.53 E 33 N 4.0 1.5 7 IRIAN JAYA REGION. INDONESIA12 12 24 44.8 3.503 N 124.488 E 306 D 4.7 1.2 63 CELEBES SEA12 12 28 05.9? 41.58 N 23.55 E 10 G 1.5 4 GREECE-BULGARIA BORDER REGION12 13 58 27.5X 40.355 N 23.583 E 10 G 6.7 5 GREECE12 13 59 04.64 62.871 N 149.857 W B1 3.2 71 CENTRAL ALASKA. <AEtC>.

a 12 14 60 40.9 28.330 N 57.148 E 33 D 5.2 6.9 259 SOUTHERN IRAN. Mw 5.0 (HRV).12 15 43 01.eX 37.916 N 21.224 E 10 G 6.7 5 SOUTHERN GREECE. MD 3.4 (ATH).12 15 57 58.1* 37.593 N 21.209 E 33 N 3.6 1.2 30 SOUTHERN GREECE12 16 04 41.3? 40.41 N 28.05 E 10 G 0.7 4 TURKEY. MD 2.5 (ISK).12 16 06 13.7? 34.75 S 70.89 W 100 G 0.1 6 CHILE-ARGENTINA BORDER REGION. MD 3.6 (SAN).12 16 17 58.44 59.210 N 153.520 W 94 32 SOUTHERN ALASKA. <AEIC>.12 16 52 21.7? 41.35 N 24.49 E 10 G 1.3 4 GREECE-BULGARIA BORDER REGION12 17 19 26.1? 40.46 N 21.46 E 10 G 1.7 4 GREECE12 17 42 37.0 33.294 S 70.092 W 10 4.2 1.0 25 CHILE-ARGENTINA BORDER REGION. MD 4.6 (SAN).12 17 57 16.6? 32.30 S 69.05 W 33 N 1.2 4 MENDOZA PROVINCE, ARGENTINA12 18 59 21.5* 37.129 S 176.570 E 281 * 0.6 18 NORTH ISLAND, NEW ZEALAND12 19 48 43.4? 18.20 S 72.40 W 33 N 4.5 0.8 8 OFF COAST OF NORTHERN CHILE12 20 14 29.0? 41.92 N 23.08 E 10 G 0.5 5 GREECE-BULGARIA BORDER REGION12 20 20 33.9? 18.74 N 95.31 W 33 N 3.7 0.9 6 VERACRUZ, MEXICO12 20 42 16.2 35.671 N 23.976 E 75 3.8 1.2 73 CRETE. MD 4.4 (HLW). 3.8 (ATH).12 21 54 43.2? 44.52 N 7.28 E 10 G 0.0 4 NORTHERN ITALY. ML 1.6 (GEN).12 22 03 49.1 37.175 N 71.601 E 122 D 4.5 0.9 60 AFGHANISTAN-TAJIKISTAN BORD REG.12 22 27 10.7* 17.884 S 178.566 W 542 ? 4.5 1.1 32 FIJI ISLANDS REGION12 23 25 05.8 33.245 S 70.150 W 10 G 0.9 13 CHILE-ARGENTINA BORDER REGION. MD 4.1 (SAN).13 00 55 51.1* 15.980 S 174.212 W 147 D 4.7 0.9 32 TONGA ISLANDS13 01 29 59.0? 38.36 S 175.87 E 189 ? 0.5 20 NORTH IS-LAND. NEW ZEALAND13 02 25 09.3* 22.924 S 68.836 W 134 ? 0.6 7 NORTHERN CHILE13 02 25 46.8 18.952 N 70.690 W 79 D 4.7 1.1 133 DOMINICAN REPUBLIC REGION. Felt throughout the

Dominican Republic.13 03 28 28.1 39.772 S 176.519 E 33 N 4.4 1.0 28 NORTH ISLAND. NEW ZEALAND. ML 4.3 (WEL).13 04 45 17.6% 37.000 N 4.542 W 10 G 0.7 6 SPAIN. mbLg 2.5 (MOD).13 05 10 16.9* 36.212 N 70.972 E 51 * 4.3 1.5 23 HINDU KUSH REGION. AFGHANISTAN13 05 34 11.1% 37.697 N 2.486 W 10 G 0.4 6 SPAIN. mbLg 2.6 (MDD).13 06 23 31.2 36.307 N 69.594 E 111 * 4.7 0.9 50 HINDU KUSH REGION. AFGHANISTAN13 07 39 49.9* 10.663 N 69.351 W 33 N 3.7 0.5 7 VENEZUELA13 07 57 18.7* 23.316 S 66.789 W 218 3.9 1.0 12 JUJUY PROVINCE, ARGENTINA13 08 35 08.24 61.053 N 149.958 W 40 38 SOUTHERN ALASKA. <AEIC>. ML 2.5 (AEIC).13 08 42 52.9 35.915 N 71.069 E 109 * 4.4 1.0 18 PAKISTAN13 08 52 44.8 40.910 S 175.127 E 33 N 3.7 0.9 22 NORTH ISLAND, NEW ZEALAND. ML 3.9 (WEL).13 09 29 46.4% 39.094 N 27.652 E 10 G 0.4 5 TURKEY. MD 2.7 (ISK).13 09 31 36.5% 40.397 N 27.910 E 5 G 0.7 6 TURKEY. MD 2.7 (ISK).13 09 35 54.6? 39.16 N 27.45 E 10 G 0.1 4 TURKEY. MD 2.8 (ISK).13 10 08 13.1? 31.18 S 67.99 W 14 0.6 9 SAN JUAN PROVINCE, ARGENTINA13 10 28 37.9? 11.61 S 117.09 E 33 N 4.0 0.7 6 SOUTH OF SUMBAWA, INDONESIA13 10 32 17.7% 42.374 N 19.304 E 23 * 0.1 9 NORTHWESTERN BALKAN REGION. ML 1.8 (TTG).13 10 46 25.2% 40.667 N 22.974 E 5 G 0.6 5 GREECE13 11 15 23.0 34.188 N 140.058 E 100 D 5.0 1.2 141 NEAR EAST COAST OF HONSHU, JAPAN13 11 36 18.2 44.748 N 8.364 E 45 * 0.5 23 NORTHERN ITALY13 11 47 95.1% 42.759 N 19.138 E 10 G 0.6 9 NORTHWESTERN BALKAN REGION. ML 1.8 (TTG).13 12 35 04.5? 39.22 N 28.72 E 10 G 1.3 4 TURKEY. MD 2.6 (ISK).13 12 49 02.5% 41.415 N 24.313 E 10 G 0.7 6 GREECE-BULGARIA BORDER REGION13 14 34 50.4 8.761 S 119.572 E 107 * 4.9 1.4 38 FLORES REGION, INDONESIA13 15 59 36.7 22.351 N 94.197 E 85 4.7 0.9 60 MYANMAR13 16 05 29.5% 39.187 N 28.599 E 10 G 0.7 5 TURKEY. MD 2.8 (ISK).13 16 20 34.2 40.494 N 1.765 E 10 G 0.7 12 BALEARIC ISLANDS. mbLg 3.3 (MDD). ML 3.3 (LOG).13 16 54 33.5% 26.949 S 26.788 E 5 G 1.5 7 REPUBLIC OF SOUTH AFRICA. ML 2.5 (PRE).13 17 56 02.0 41.190 N 75.719 E 22 D 4.7 4.0 1.1 104 KYRGYZSTAN. Felt (V) at Atbashi and Naryn.13 17 57 29.1* 35.214 N 30.684 E 33 N 1.5 9 EASTERN MEDITERRANEAN SEA. ML 3.2 (CSS).13 18 22 14.34 62.484 N 151.449 W 96 47 CENTRAL ALASKA. <AEIC>.13 18 52 08.2 38.510 N 20.512 E 10 G 1.0 20 GREECE. MD 3.2 (ATH).13 19 12 20.1* 47.612 N 152.823 E 33 N 4.3 0.4 8 KURIL ISLANDS13 19 27 50.7* 1.265 N 122.483 E 33 N 4.5 1.4 14 MINAHASSA PENINSULA, SULAWESI13 19 28 52.8? 1.03 N 122.50 E 33 N 4.6 0.9 7 MINAHASSA PENINSULA. SULAWESI13 19 39 32.2 15.286 N 92.900 W 86 4.4 1.1 43 MEXICO-GUATEMALA BORDER REGION. MD 4.3 (GCG).

a 13 20 07 16.6 1.196 N 126.518 E 45 5.5 5.0 1.1 222 NORTHERN MOLUCCA SEA. Mw 5.8 (HRV).13 20 20 08.6% 43.180 N 18.571 E 10 G 0.3 9 NORTHWESTERN BALKAN REGION. ML 1.8 (TTG).13 20 47 08.6* 26.360 N 96.232 E 86 * 4.3 0.6 13 MYANMAR13 21 01 43.0 40.610 N 21.308 E 10 G 0.6 13 GREECE. MD 3.0 (ATH).13 21 21 46.6% 31.365 S 67.984 W 33 N 0.6 6 SAN JUAN PROVINCE,. ARGENT INA13 21 38 58.4 39.275 N 22.141 E 10 G 1.2 13 GREECE. MD 3.0 (ATH).13 21 51 20.4 39.192 N 22.073 E 16 0.6 11 GREECE13 23 59 26.0 42.948 N 147.291 E 40 D 4.7 4.2 1.0 73 OFF COAST OF HOKKAIDO. JAPAN14 00 15 26.5* 7.027 N 125.143 E 33 N 4.1 1.7 11 MINDANAO. PHILIPPINE ISLANDS14 00 24 49.8 44.813 N 110.972 W 5 G 0.8 15 YELLOWSTONE REGION. WYOMING. ML 3.0 (GS). 3.3 (BUT).14 01 06 54.6 26.330 S 27.526 E 5 G 1.0 9 REPUBLIC OF SOUTH AFRICA. mbLg 3.2 (BUL). ML 3.1 (PRE).14 01 22 16.8* 5.235 S 153.576 E 54 D 5.0 1.4 24 NEW IRELAND REGION. P.N.G.14 01 40 23.9 17.689 N 78.723 W 26 D 4.5 1.1 53 JAMAICA REGION. MD 4.6 (HOJ). Felt (III) in western

Jama i ca.14 03 28 26.14 58.821 N 152.216 W 59 33 KODIAK ISLAND REGION. <AEIC>. ML 2.8 (AEIC).14 04 16 25.64 61.783 N 150.027 W 37 59 SOUTHERN ALASKA. <AEIC>. ML 2.7 (AEIC).14 04 25 59.54 40.312 N 124.573 W 19 14 NEAR COAST OF NORTHERN CALIF. <GM-P>. MD 3.2 (GM). ML

3.1 (BRK).14 04 31 34.2* 17.029 N 99.444 W 51 * 3.4 1.2 13 GUERRERO, MEXICO14 05 20 41.7 49.155 N 6.946 E 10 G 0.8 15 GERMANY. ML 2.6 (STR), 2.3 (UCC).14 05 49 23.6? 38.08 N 14.96 E 10 G 0.2 4 SICILY14 05 50 37.9? 37.75 N 72.64 E 33 N 4.1 1.2 13 TAJIKISTAN

a 14 05 58 32.6 51.131 N 168.B25 W 33 N 5.6 5.4 0.9 342 FOX ISLANDS. ALEUTIAN ISLANDS. Mw 5.9 (HRV). Ms 5.3

APR 1993 PAGE 10

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(BRK).SOUTHERN NORWAY. MD 2.2 (BER).GREECEMYANMAR-INDIA BORDER REGIONCENTRAL ALASKA. <AE|C>.TURKEY. MD 3.2 (ISK).EASTERN NEW GUINEA REG.. P.N.G.SOUTHERN NORWAY. MD '1.7 (BER).REPUBLIC OF SOUTH AFRICA. ML 3.9 (PRE). mbLg 3.9 (BUL)NORTHERN XINJIANG, CHINA. ML 4.8 (BJI).EASTERN NEW GUINEA REG., P.N.G.SAN JUAN PROVINCE, ARGENTINASOUTHERN XINJIANG, CHINAFIJI ISLANDS REGIONNEAR COAST OF NICARAGUA. MD 4.9 (GCG). Felt in theMosoyo area.NORTHERN ITALY. ML 2.0 (GEN).FRANCE. ML 3.2 (LDG). 2.8 (STR).FRANCE. ML 3.0 (LDG), 2.4 (STR).NORTHWESTERN BALKAN REGION. ML 1.8 (TTG).BULGARIABULGARIANORTHWESTERN BALKAN REGION. MD 2.4 (LJU).NORTH ISLAND, NEW ZEALANDREPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).NORTHWESTERN BALKAN REGION. ML 2.3 (SKO).FRANCE. ML 2.0 (GEN).SAMOA ISLANDS REGIONJUJUY PROVINCE, ARGENTINANEAR COAST OF CHIAPAS. MEXICOTURKEY. MD 2.6 (ISK).GREECETURKEY. MD 2.8 (ISK).LEEWARD ISLANDS. ML 4.3 (FDF).CENTRAL MID-ATLANTIC RIDGESOUTH OF MARIANA ISLANDSNEAR EAST COAST OF HONSHU, JAPANNORTHERN ITALY. ML 2.7 (LDG).BANDA SEACHILE-ARGENTINA BORDER REGION. MD 3.4 (SAN).OFF E. COAST OF N. ISLAND, N.Z.REPUBLIC OF SOUTH AFRICA. ML 2.9 (PRE). mbLg 2.9 (BUL).CHILE-ARGENTINA BORDER REGION. MD 3.6 (SAN).NORTHERN COLOMBIAMYANMARNORTHWESTERN BALKAN REGIONREPUBLIC OF SOUTH AFRICA. ML 3.2 (PRE). mbLg 3.1 (BUL).NORTH ISLAND, NEW ZEALANDNEAR EAST COAST OF HONSHU, JAPANCHILE-ARGENTINA BORDER REGION. MD 4.7 (SAN).ARU ISLANDS REGION, INDONESIANORTHERN ITALY. ML 2.6 (LDG).NORTHWEST OF AUSTRALIACHILE-ARGENTINA BORDER REGION. MD 4.0 (SAN).GREECE. MD 3.4 (ATH).GREECEICELAND REGIONOFF EAST COAST OF HONSHU. JAPANFRANCE. ML 2.8 (LDG).SOUTH OF HONSHU, JAPANCHILE-ARGENTINA BORDER REGION. MD 4.8 (SAN).SOUTHERN ITALYFOX ISLANDS, ALEUTIAN ISLANDSKODIAK ISLAND REGION. <AEIC>. ML 2.9 (AEIC).MONTANA. <BUT>. ML 2.8 (BUT). Felt at Norrls.NEAR COAST OF CENTRAL CHILE. MD 3.8 (SAN).VANUATU ISLANDSOFF E. COAST OF N. ISLAND, N.Z. ML 3.9 (WEL).ROMAN I ASOUTHERN ALASKA. <AEIC>. ML 3.3 (AEIC), 3.5 (PMR).VOLCANO ISLANDS REGIONREPUBLIC OF SOUTH AFRICA. ML 3.1 (PRE). mbLg 3.0 (BUL).AUSTRIA. ML 1.3 (VIE).NORTHWESTERN BALKAN REGION. ML 2.5 (TTG).NORTHWESTERN BALKAN REGION. ML 2.7 (TTG).REPUBLIC OF SOUTH AFRICA. ML 2.2 (PRE).BANDA SEATURKEY. MD 2.7 (ISK) .REPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).TURKEY. MD 2.6 (ISK) .TURKEY. MD 2.7 (ISK) .SOUTHERN MID-ATLANTIC RIDGE. Mw 5.6 (HRV).NORTH ATLANTIC OCEAN. mbLg 3.4 (MDD).TURKEY. MD 3.1 (ISK).NORTHWESTERN BALKAN REGION. ML 2.3 (TTG).FOX ISLANDS, ALEUTIAN ISLANDSREPUBLIC OF SOUTH AFRICA. ML 2.4 (PRE).NORTHERN ITALY. ML 1.9 (GEN).NORTHERN CALIFORNIA. <GM-P>. MD 3.5 (GM). ML 3.7 (BRK).3.2 (GS).NEAR COAST OF VENEZUELA. MD 3.8 (TRN).FIJI ISLANDS REGION. Mw 5.6 (HRV).TURKEY. MD 2.7 (ISK).

PAGE 11 APR 1993

15 13 55 19.5? 11.95 N 89.17 W 33 N 3.8 0.4 5 OFF COAST OF CENTRAL AMERICA. Felt (II) at SanSalvador, El Salvador.

15 14 40 09.0 44.202 N 6.164 E 19 G 0.7 14 FRANCE. ML 2.5 (LOG), 1.7 (STR).15 14 45 08.0* 36.298 N 26.630 E 131 4.5 e.9 22 DODECANESE ISLANDS. MD 4.3 (HLW).15 14 49 39.0% 26.929 S 26.793 E 5 G e.7 8 REPUBLIC OF SOUTH AFRICA. ML 3.0 (PRE).15 15 23 35.6* 24.187 S 67.027 W 202 ? 3.8 1.1 9 CHILE-ARGENTINA BORDER REGION15 16 11 19.8 7.349 S 156.129 E 27 D 5.2 4.9 1.1 112 SOLOMON ISLANDS. Mw 5.3 (HRV).15 16 27 54.5 49.119 N 156.127 E 26 D 4.9 4.5 0.9 114 KURIL ISLANDS15 17 08 01.2* 59.985 N 152.525 W 103 41 SOUTHERN ALASKA. <AEIC>.15 17 53 38.47 10.048 N 69.813 W 10 G 0.8 8 VENEZUELA15 18 09 19.87 40.406 N 28.926 E 10 G 0.1 5 TURKEY. MD 2.5 (ISK).15 18 13 38.1? 26.14 N 128.90 E 33 N 4.0 1.3 8 RYUKYU ISLANDS15 18 30 46.1* 39.708 N 142.325 E 33 N 4.3 1.5 31 NEAR EAST COAST OF HONSHU, JAPAN15 18 44 58.4? 17.64 S 174.39 W 436 ? 4.5 0.7 21 TONGA ISLANDS15 19 00 13.7? 39.88 S 68.35 W 33 N 0.3 5 SAN JUAN PROVINCE, ARGENTINA15 19 12 39.8* 62.878 N 149.137 W 77 3.6 77 CENTRAL ALASKA. <AEIC>. Felt (III) at Cantwell.15 19 43 41.2 19.300 N 125.962 E 45 D 4.9 4.2 1.2 76 LEYTE, PHILIPPINE ISLANDS. Mw 5.2 (HRV).15 19 57 10.5? 51.09 N 15.89 E 10 G 1.2 6 POLAND. ML 3.3 (VIE).15 20 51 33.5 49.180 N 156.039 E 33 N 4.8 4.6 1.0 105 KURIL ISLANDS. Mw 5.9 (HRV).15 21 30 02.37 52.499 N 0.763 W 5 G 0.4 9 UNITED KINGDOM. ML 2.3 (BGS).15 21 51 25.6? 39.36 N 142.24 E 33 N 1.2 5 NEAR EAST COAST OF HONSHU, JAPAN15 23 10 21.1* 59.584 N 153.374 W 118 39 SOUTHERN ALASKA. <AEIC>.15 23 13 14.1? 13.56 N 123.03 E 33 N 0.9 5 LUZON, PHILIPPINE ISLANDS. Felt at Nago.15 23 31 43.1* 23.858 S 68.010 W 133 * 4.3 1.7 19 NORTHERN CHILE15 23 35 27.0? 43.98 N 6.57 E 19 G 0.1 4 NEAR SOUTH COAST OF FRANCE15 23 38 19.7? 44.19 N 6.25 E 10 G 0.6 10 FRANCE. ML 2.4 (LDG).15 23 41 27.3 51.104 N 178.117 W 33 N 4.5 0.9 46 ANDREANOF ISLANDS, ALEUTIAN IS.16 09 06 09.6* 62.283 N 151.119 W 84 39 CENTRAL ALASKA. <AEIC>.16 01 24 24.3? 17.70 N 66.25 W 33 N 1.5 6 PUERTO RICO REGION16 02 01 40.67 40.405 N 21.059 E 10 G 0.4 6 GREECE16 02 57 07.4* 45.767 N 14.052 E 10 G 0.4 5 NORTHWESTERN BALKAN REGION. MD 1.5 (TRI).16 03 29 43.1* 15.109 N 93.011 W 94 * 4.0 1.2 17 NEAR COAST OF CHIAPAS, MEXICO16 03 57 01.4 13.591 N 123.096 E 39 D 4.3 4.2 1.3 23 LUZON, PHILIPPINE ISLANDS16 04 09 19.3 56.212 N 155.086 W 25 5.3 5.1 0.8 249 ALASKA PENINSULA. Mw 5.5 (HRV). ML 5.2 (AEIC), 5.1

(PMR). Felt (III) at Akhiok and (II) at Karluk.16 04 20 44.3? 39.54 N 24.95 E 10 G 0.6 4 AEGEAN SEA16 04 34 45.7* 56.557 N 155.097 W 172 3.0 27 ALASKA PENINSULA. <AEIC>.16 04 54 33.4* 59.598 N 152.833 W 103 49 SOUTHERN ALASKA. <AEIC>.16 06 56 52.5 41.139 N 22.425 E 10 G 0.4 6 NORTHWESTERN BALKAN REGION. ML 1.5 (SKO).16 07 20 59.6* 30.134 S 166.036 E 21 D 4.7 4.9 1.4 11 NORTHWEST OF NEW ZEALAND16 07 24 46.37 41.886 N 13.664 E 10 G 0.3 5 SOUTHERN ITALY16 07 27 12.4* 39.186 S 166.096 E 33 N 4.9 4.7 1.7 18 NORTHWEST OF NEW ZEALAND16 07 33 07.9% 28.029 S 26.871 E 5 G 0.3 8 REPUBLIC OF SOUTH AFRICA. ML 2.8 (PRE).16 08 16 38.0? 15.56 N 93.40 W 33 N 1.3 4 NEAR COAST OF CHIAPAS, MEXICO16 08 44 18.5* 64.423 N 137.355 W 19 G 4.4 29 SOUTHERN YUKON TERRITORY, CANADA. <PGC-P>. ML 3.9

(PGC), 3.8 (AEIC).16 09 12 27.1 8.258 N 75.239 W 27 D 4.5 1.1 49 NORTHERN COLOMBIA16 09 13 24.3? 48.49 S 164.84 E 33 N 3.1 1.1 10 OFF W. COAST OF S. ISLAND, N.Z.16 09 31 12.0? 37.98 N 27.16 E 5 G 1.16 TURKEY. MD 3.3 (ISK).16 10 13 41.8* 30.173 S 166.067 E 17 D 5.0 4.9 1.5 23 NORTHWEST OF NEW ZEALAND16 10 45 32.2? 31.10 S 68.87 W 100 G 0.9 5 SAN JUAN PROVINCE, ARGENTINA16 10 53 11.3* 11.156 S 166.351 E 188 ? 4.2 0.6 8 SANTA CRUZ ISLANDS16 11 31 54.6* 34.391 S 112.338 W 10 G 5.0 4.7 1.6 37 SOUTHERN EAST PACIFIC RISE16 11 43 04.1? 39.18 N 27.37 E 10 G 1.0 4 TURKEY. MD 2.7 (ISK).16 11 43 14.47 11.312 N 61.284 W 10 G e.6 9 WINDWARD ISLANDS. MD 3.2 (TRN).16 12 23 01.57 45.455 N 24.697 E 10 G 1.6 6 ROMANIA16 12 27 05.9% 41.094 N 29.180 E 10 G 0.2 5 TURKEY. MD 2.8 (ISK).16 12 36 09.27 38.345 S 175.827 E 228 0.4 35 NORTH ISLAND, NEW ZEALAND16 13 00 36.47 40.212 S 173.322 E 200 G 0.7 28 COOK STRAIT, NEW ZEALAND16 13 01 22.8? 15.54 N 91.45 W 33 N 1.6 5 MEXICO-GUATEMALA BORDER REGION. MD 4.0 (GCG).16 13 06 42.8* 26.391 S 27.406 E 5 G 0.6 7 REPUBLIC OF SOUTH AFRICA. ML 3.3 (PRE). mbLg 3.1 (BUL).16 13 29 34.2* 51.391 N 168.828 W 33 N 3.9 1.3 8 FOX ISLANDS, ALEUTIAN ISLANDS16 14 08 38.9 17.778 S 178.864 W 565 G 6.0 1.1 585 FIJI ISLANDS REGION. Mw 6.9 (GS), 6.9 (HRV). mb 6.0

(BRK). Mo-1.0*10**19 Nm (PPT). Depth from broadbanddisplacement seismograms.

16 14 21 54.0? 3.28 N 127.70 E 162 * 4.8 0.5 11 TALAUD ISLANDS, INDONESIA16 14 24 30.2 15.827 N 60.295 W 10 G 4.1 0.7 20 LEEWARD ISLANDS. MD 4.0 (TRN). ML 3.6 (FDF).16 14 35 22.5* 34.004 N 116.321 W 6 8 SOUTHERN CALIFORNIA. <PAS-P>. ML 3.1 (PAS). 3.0 (GS).

Felt (III) at Palm Springs. Also felt at White Water.16 14 46 13.77 26.385 S 27.357 E 5 G 0.5 8 REPUBLIC OF SOUTH AFRICA. ML 3.0 (PRE).16 14 47 27.6* 38.840 N 122.814 W 3 7 NORTHERN CALIFORNIA. <GM-P>. MD 2.9 (CM).16 15 12 28.2 1.667 S 135.434 E 30 D 5.2 1.1 80 IRIAN JAYA REGION. INDONESIA16 15 26 34.8? 60.68 N 5.57 E 10 G 0.1 4 SOUTHERN NORWAY. MD 1.6 (BER).16 15 43 09.4? 39.02 N 23.82 E 10 G 0.3 4 AEGEAN SEA16 16 47 46.1 38.061 S 176.810 E 118 * 1.3 20 NORTH ISLAND. NEW ZEALAND16 18 15 56.0* 34.617 N 91.499 E 33 N 3.6 0.9 9 OINGHAI, CHINA16 18 41 26.6* 7.479 S 128.517 E 176 * 4.4 1.4 16 BANDA SEA16 18 59 24.3? 45.58 N 26.32 E 130 G 0.9 4 ROMANIA16 19 14 21.6 49.183 N 156.022 E 32 D 4.7 0.8 51 KURIL ISLANDS16 19 54 26.6* 12.111 S 166.406 E 71 D 5.2 1.1 41 SANTA CRUZ ISLANDS16 19 56 44.6* 45.580 N 26.369 E 141 ? 1.3 14 ROMANIA16 20 50 19.3* 1.641 S 135.474 E 19 D 5.2 4.6 0.9 82 IRIAN JAYA REGION, INDONESIA16 20 55 36.7* 1.690 S 135.457 E 33 N 4.9 1.3 12 IRIAN JAYA REGION, INDONESIA16 21 10 11.9 23.244 N 120.867 E 10 G 4.2 1.5 25 TAIWAN. ML 4.3 (BJI).16 22 33 09.3* 61.838 N 150.565 W 56 60 SOUTHERN ALASKA. <AEIC>. ML 2.7 (AEIC), 3.1 (PMR).16 22 51 56.67 10.780 N 62.052 W 33 N 1.2 6 NEAR COAST OF VENEZUELA. MD 3.1 (TRN).16 22 57 15.1 33.777 S 70.217 W 107 ? 0.3 11 CHILE-ARGENTINA BORDER REGION. MD 3.8 (SAN).16 23 03 12.4 49.178 N 6.956 E 10 G 0.9 18 GERMANY. ML 2.6 (STR). MD 2.4 (UCC).16 23 37 48.6 41.231 N 19.478 E 10 G 1.0 31 ALBANIA. MD 3.3 (ATH). ML 3.1 (TTG).16 23 38 23.6* 23.640 S 66.732 W 230 * 0.7 9 JUJUY PROVINCE, ARGENTINA16 23 47 02.2% 40.458 N 23.491 E 10 G 0.4 5 GREECE17 00 24 35.1 38.514 N 20.451 E 10 G 0.9 9 GREECE. MD 3.1 (ATH).17 01 36 36.5% 37.532 N 15.228 E 10 G 0.8 8 SICILY

APR 1993 PAGE 12

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NEAR COAST OF ECUADORIRIAN JAYA REGION. INDONESIAOFF COAST OF HOKKAIDO, JAPANNORTH ISLAND, NEW ZEALAND. ML 4.0 (WEL).SOUTHERN ITALYSAN JUAN PROVINCE, ARGENTINAOFF E. COAST OF N. ISLAND, N.2.CENTRAL ALASKA. <AEIC>.CHILE-ARGENTINA BORDER REGION. MD 3.3 (SAN).MEXICO-GUATEMALA BORDER REGIONOFF EAST COAST OF HONSHU, JAPANTURKEY. MD 2.7 (ISK).TURKEY. MD 2.7 (ISK).TURKEY. MD 2.7 (ISK).TURKEY. MD 2.6 (ISK).SOUTHERN ALASKA. <AEIC>.TURKEY. MD 2.7 (ISK).PYRENEES. ML 1.0 (STR).CELEBES SEASOUTHERN CALIFORNIA. <PAS-P>.Fel t.SOUTHERN CALIFORNIA. <PAS-P>.REPUBLIC OF SOUTH AFRICA. ML 3.4 (PRE). mbLg 3.3 (BUL).AEGEAN SEA. MD 3.5 (ISK). 3.4 (ATH).LAKE BAYKAL REGION, RUSSIAREPUBLIC OF SOUTH AFRICA. ML 2.9 (PRE).TONGA ISLANDS. Mw 5.3 (HRV).TURKEY. MD 2.7 (ISK).JAWA. INDONESIAOFF COAST OF GUERRERO, MEXICONEAR COAST OF VENEZUELA. MD 3.4 (TRN).CENTRAL ALASKA. <AEIC>.SOUTHERN IRANSOUTH OF FIJI ISLANDSLOYALTY ISLANDSGREECESOUTH SANDWICH ISLANDS REGIONPORTUGAL. mbLg 3.1 (MOD).NEAR COAST OF PERUFIJI ISLANDS REGION. Mw 6.3 (GS), 6.3 (HRV).REPUBLIC OF SOUTH AFRICA. ML 3.5 (PRE). mbLg 3.3 (BUL).TURKEY. MD 2.7 (ISK).SOUTHERN ITALYVANUATU ISLANDSNEAR COAST OF VENEZUELA. MD 3.0 (TRN).NORTHERN ALASKA. <AEIC>. ML 4.3 (PMR), 4.1 (PGC), 3.8(AEIC). Felt (IV) ot Centrol and Circle; (I) at DeltaJune t i on.TONGA ISLANDS REGIONNEAR COAST OF GUERRERO, MEXICOROMANIASOUTHERN GREECE. MD 3.1 (ATH).WINDWARD ISLANDS. MD 3.3 (TRN).KERMADEC ISLANDS REGIONREPUBLIC OF SOUTH AFRICA. mbLg 3.9 (BUL). ML 3.7 (PRE).SOUTH OF MARIANA ISLANDSANDAMAN ISLANDS, INDIANORTHWESTERN BALKAN REGION. ML 1.8 (TTG).REPUBLIC OF SOUTH AFRICAANDAMAN ISLANDS, INDIA. Mw 5.2 (HRV).NEAR COAST OF OAXACA, MEXICONEAR EAST COAST OF HONSHU. JAPANSTRAIT OF GIBRALTAR. mbLg 4.0 (MOD).STRAIT OF GIBRALTAR. mbLg 3.9 (MOD).AEGEAN SEASTRAIT OF GIBRALTAR. mbLg 3.0 (MOD).TURKEY. MD 2.6 (ISK).SOUTHERN ALASKA. <AEIC>.NORTHERN COLOMBIAGUATEMALANORTHEASTERN CHINA. ML 4.2 (BJI).SOUTHERN ALASKA. <AEIC>.NORTHERN CHILENEAR COAST OF CHIAPAS, MEXICOTURKEY. MD 3.1 (ISK).CENTRAL PERU. Mw 6.3 (GS). 6.3 (HRV). mb 5.8 (BRK). Sixpeople killed, including 3 killed by earthquake-inducedlandslides at Lima. Thirty houses destroyed (VI) atLima. Felt (V) at Chimbote and Huacho; (IV) at lea andTrujilla; (III) at Huancaya and Huaraz; (II) atChiclaya. Depth from broadband displacementse i smog rams.TONGA ISLANDS REGIONSOUTHERN ALASKA. <AEIC>. ML 3.0 (AEIC), 3.3 (PGC).NORTHWESTERN BALKAN REGION. ML 1.9 (TTG).NORTHWESTERN BALKAN REGION. ML 2.9 (TlR), 2.7 (TTG).BANDA SEATURKEY. MD 2.6 (ISK).PACIFIC-ANTARCTIC RIDGE. Mw 6.3 (HRV). Ms 6.2 (BRK).FIJI ISLANDS REGIONBANDA SEANEAR COAST OF CENTRAL CHILE. MD 4.5 (SAN).SOUTH INDIAN OCEAN

PAGE 13 APR 1993

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GREECEGREECE. MD 3.6 (ATM).GREECESAN JUAN PROVINCE, ARGENTINAMEXICO-GUATEMALA BORDER REGIONNEW BRITAIN REGION, P.N.G.OFF COAST OF CENTRAL CHILESOUTHERN ITALYKURIL ISLANDSGUATEMALA. At least 56 houses were slightly damagedSanta Rosa Department. Felt (III) at Guatemala City.GREECETURKEY. MD 2.7 ( ISK).ALBANIA. ML 2.2 (TTG).

In

WASHINGTON. <SEA-P>. MD 3.1 (SEA). Felt in the Demingarea.NORTHERN MID-ATLANTIC RIDGESOUTHERN CALIFORNIA. <PAS-P>. ML 2.9 (PAS). Felt.NORTHERN NORWAY. MD 2.7 (BER).HALMAHERA, INDONESIATURKEY. MD 2.7 (ISK).GUATEMALASOUTHERN ALASKA. <AEIC>.OFF COAST OF NORTHERN CALIFORNIA. ML 4.1 (BRK).MYANMARTURKEY. MD 2.9 (ISK).FRANCE. ML 2.2 (LOG) .NORTHERN YUKON TERRITORY. CANADA. <PGC-P>. ML 3.8(PGC).NORTHERN ITALYDODECANESE ISLANDS. MD 4.3 (HLW). 4.2 (ATH). 4.6 (ISK).NORTHWESTERN CAUCASUSNEAR COAST OF NICARAGUATURKEY. MD 3.6 (ISK) .TURKEY. MD 2.8 ( ISK) .TURKEYTURKEY. MD 2.7 ( ISK).TURKEY. MD 2.7 ( ISK) .OFF COAST OF NORTHERN CALIFORNIA. <GM-P>. MD 3.6 (GM).GREECEFOX ISLANDS, ALEUTIAN ISLANDSTURKEY. MD 2.9 ( ISK).NORTH ISLAND, NEW ZEALANDTURKEY. MD 2.8 ( ISK) .SAN JUAN PROVINCE, ARGENTINAAFGHANISTAN-TAJIKISTAN BORD REG.BALI SEATURKEY. MD 2.7 ( ISK) .TURKEY. MD 2.7 (ISK).VANUATU ISLANDSIRIAN JAYA REGION, INDONESIASOUTHERN ALASKA. <AEIC>. ML 2.6 (AEIC).SOUTHERN CALIFORNIA. <PAS-P>. ML 2.8 (PAS). Felt.MINAHASSA PENINSULA, SULAWESINEAR SOUTH COAST OF FRANCE. ML 2.6 (STR).REPUBLIC OF SOUTH AFRICA. ML 2.7 (PRE).OFF E. COAST OF N. ISLAND, N.2.NEAR COAST OF GUERRERO, MEXICOSOUTHERN NORWAY. MD 1 . 7 (BER).GREECEOFF E. COAST OF N. ISLAND, N.2. ML 4.1 (WEL).ALBANIA. ML 2.5 (TIR), 2.4 (TTG).VANUATU ISLANDSCENTRAL CALIFORNIA. <PAS-P>. ML 3.2 (PAS). Felt otBarstow and Hinkley.REPUBLIC OF SOUTH AFRICA. ML 2.3 (PRE).NORTHERN COLOMBIAKERMADEC ISLANDS REGIONCENTRAL ITALYNORTH OF HALMAHERA, INDONESIA. Mw 6.8 (GS), 6.8 (HRV)Ms 6.8 (BRK). Mo-2.8*10**19 Nm (PPT). Depth frombroadband displacement se i smog rams .NORTHERN CHILEFRANCE. ML 2.2 (LOG).NORTHERN ITALY. ML 2.9 (LOG), 2.5 (GEN).CENTRAL ITALYAEGEAN SEASOUTHERN CALIFORNIA. <PAS-P>. ML 2.8 (PAS).SOUTHERN ITALYGREECE-ALBANIA BORDER REGION. MD 3.2 (ATH).GUERRERO, MEXICOVANUATU ISLANDSJUJUY PROVINCE, ARGENTINANORTHWESTERN BALKAN REGIONNEVADA. ML 3.3 (GS), 3.5 (BRK).SOUTH OF HONSHU. JAPANCENTRAL ITALYEASTERN MEDITERRANEAN SEA. MD 3.8 (ATH).NORTHWESTERN BALKAN REGION. ML 2.2 (SKO).AFGHANISTAN-TAJIKISTAN BORD REG.LEEWARD ISLANDS. MD 4.6 (TRN) . Felt (IV) on Angullla.Soi nt-Bor the I emy and Saint-Martin.GREECE-ALBANIA BORDER REGION. MD 3.2 (ATH).

APR 1993 PAGE 14

20 85 38 48.14 37.653 N 118.915 W 5 14 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.8 (GM).20 06 16 49.1* 29.125 S 61.263 E 10 G 4.9 1.1 26 SOUTHWEST INDIAN RIDGE20 86 44 50.84 59.421 N 153.172 W 107 72 SOUTHERN ALASKA. <AEIC>.20 06 46 45.5* 29.233 S 61.243 E 18 G 5.1 0.9 32 SOUTHWEST INDIAN RIDGE20 97 00 00.3% 31.091 S 68.242 W 100 G 1.3 7 SAN JUAN PROVINCE, ARGENTINA20 07 42 44.2? 39.13 N 27.57 E 10 G 0.3 4 TURKEY. MD 2.7 (ISK).

a 20 88 11 21.0 54.366 S 144.886 E 10 G 5.3 5.7 1.5 69 WEST OF MACQUARIE ISLAND. Mw 5.9 (HRV).20 08 15 30.6% 38.654 N 29.290 E 10 G 0.9 6 TURKEY. MD 3.0 (ISK).20 08 42 41.8% 40.362 N 23.236 E 10 G 0.6 5 GREECE20 08 49 49.1? 54.79 S 143.72 E 18 G 4.4 0.8 8 WEST OF MACQUARIE ISLAND20 08 53 04.0? 40.68 N 22.95 E 5 G 0.7 4 GREECE20 09 41 05.0% 42.323 S 172.770 E 12 1.0 19 SOUTH ISLAND. NEW ZEALAND. ML 3.9 (WEL).20 09 43 62.2* 4.026 N 128.404 E 41 * 4.7 4.2 1.2 22 NORTH OF HALMAHERA, INDONESIA20 16 86 83.5? 59.80 N 18.48 E 18 G 0.1 4 SWEDEN20 10 19 27.4? 59.65 N 18.49 E 10 G 0.6 4 SWEDEN20 10 27 81.1? 59.83 N 18.34 E 10 G 0.1 4 SWEDEN20 18 35 80.14 34.367 N 116.458 W 4 11 SOUTHERN CALIFORNIA. <PAS-P>. ML 3.0 (PAS). Felt.20 10 49 17.14 34.468 N 118.629 W 7 14 SOUTHERN CALIFORNIA. <PAS-P>. ML 3.8 (PAS). Felt in the

Cos to i c area.20 11 21 25.3? 39.98 N 24.96 E 10 G 1.0 4 AEGEAN SEA20 11 43 47.7% 40.495 N 23.507 E 10 G 0.4 5 GREECE20 12 08 27.1% 44.576 N 7.256 E 10 G 0.4 7 NORTHERN ITALY. ML 1.8 (GEN).20 12 38 45.7 18.717 N 64.160 W 33 N 0.9 22 VIRGIN ISLANDS. ML 4.4 (FDF). MD 4.2 (TRN).20 12 43 38.7 64.195 N 140.322 W 10 G 0.7 21 SOUTHERN YUKON TERRITORY, CANADA. ML 3.6 (PGC). 2.7

(AEIC).20 13 82 53.3? 78.39 N 6.42 E 10 G 0.5 4 SVAL8ARD REGION. MD 2.4 (8ER).20 13 19 88.2* 2.619 N 95.981 E 23 D 4.8 1.1 20 OFF W COAST OF NORTHERN SUMATERA20 13 42 89.8 34.011 N 26.120 E 33 N 4.3 1.4 72 CRETE. MD 4.3 (HLW).20 13 55 36.6% 45.138 N 7.665 E 10 G 1.8 9 NORTHERN ITALY. ML 2.3 (GEN).20 14 87 06.8? 22.93 S 71.89 W 33 N 4.4 1.7 7 OFF COAST OF NORTHERN CHILE20 14 45 34.7* 10.316 N 83.656 W 33 N 4.0 1.2 16 COSTA RICA. Felt in much of Costa Rica.20 14 46 58.1? 32.74 S 138.70 E 10 G 1.7 5 NEAR SOUTH COAST OF AUSTRALIA20 14 55 18.24 59.793 N 153.667 W 124 35 SOUTHERN ALASKA. <AEIC>.20 15 24 80.4 26.836 S 26.801 E 5 G 1.2 9 REPUBLIC OF SOUTH AFRICA. ML 3.4 (PRE). mbLg 3.1 (BUL).20 15 44 27.5? 3.43 S 139.52 E 33 N 4.6 1.5 14 IRIAN JAYA. INDONESIA20 15 58 83.8? 15.01 S 173.80 W 38 D 4.4 0.7 7 TONGA ISLANDS20 16 11 27.64 60.125 N 152.921 W 116 3.7 91 SOUTHERN ALASKA. <AEIC>.

a 20 16 26 19.5 20.883 S 178.699 W 592 D 5.6 1.0 455 FIJI ISLANDS REGION. Mw 5.8 (HRV). mb 5.7 (8RK).20 16 48 01.8? 14.20 S 179.26 W 506 ? 4.3 1.1 20 FIJI ISLANDS REGION20 17 10 28.6% 17.979 N 66.934 W 10 G 0.2 5 PUERTO RICO REGION20 18 06 48.4% 40.823 N 29.036 E 10 G 0.7 5 TURKEY. MO 2.5 (ISK).20 18 18 14.9% 42.606 N 13.193 E 10 G 1.7 8 CENTRAL ITALY20 18 56 42.8 83.838 N 112.978 E 10 G 4.3 1.3 22 NORTH OF SEVERNAYA ZEMLYA20 19 00 29.74 37.453 N 118.365 W 10 13 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 2.9 (GM).20 19 23 41.1% 43.599 N 12.255 E 10 G 1.0 5 CENTRAL ITALY20 19 52 09.7? 7.07 S 129.99 E 116 ? 4.1 1.7 7 8ANDA SEA20 19 53 32.0% 41.222 N 23.138 E 10 G 0.5 6 GREECE-BULGARIA BORDER REGION20 20 08 13.6? 31.85 S 179.85 E 436 ? 4,2 1.5 17 KERMADEC ISLANDS REGION20 20 23 47.5% 42.364 N 19.361 E 23 * 0.1 9 NORTHWESTERN BALKAN REGION. ML 2.0 (TTG).20 20 54 16.2 43.413 N 5.406 E 10 G 1.0 19 NEAR SOUTH COAST OF FRANCE. ML 3.1 (STR) .20 21 16 83.64 37.626 N 118.894 W 3 33 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.4 (GM).

ML 3.3 (8RK). Felt in the Mammoth Lakes, California area.

20 22 17 20.0 7.078 N 125.144 E 19 0 4.8 4.3 1.1 46 MINDANAO, PHILIPPINE ISLANDS20 22 24 43.3* 2.659 N 125.888 E 147 « 4.7 1.2 13 TALAUD ISLANDS, INDONESIA20 23 22 26,5? 12.40 N 143.62 E 33 N 3.4 0.8 6 SOUTH OF MARIANA ISLANDS20 23 30 41.1? 23,33 S 65.93 W 93 ? 1.7 7 JUJUY PROVINCE, ARGENTINA20 23 53 84.14 37.587 N 118.869 W 7 21 CALIFORNIA-NEVADA BORDER REGION. <GM-P>: MD 3.1 (GM).

ML 3.0 (BRK).21 00 30 19.9? 46.39 N 150.26 E 33 N 3.7 1.0 9 KURIL ISLANDS21 00 38 87.04 61.278 N 150.168 W 38 53 SOUTHERN ALASKA. <AEIC>. ML 2.7 (AEIC).21 00 52 37.7* 20.383 S 68.479 W 167 « 3.0 0.9 6 CHILE-BOLIVIA BORDER REGION21 02 27 21.5% 31.765 S 67.994 W 20 * 0.4 7 SAN JUAN PROVINCE, ARGENTINA21 03 25 49.1% 44.546 N 7.454 E 10 G 0.8 7 NORTHERN ITALY. ML 1.7 (GEN).21 03 56 29.5? 14.32 N 60.72 W 75 G 0.2 4 WINDWARD ISLANDS21 04 37 31.1? 44.98 S 167.29 E 164 ? 0.2 12 SOUTH ISLAND, NEW ZEALAND21 04 58 14.84 60.216 N 152.742 W 93 40 SOUTHERN ALASKA. <AEIC>.21 05 16 52.2? 38.74 N 15.53 E 110 G 0.5 5 SICILY21 06 11 46.0 34.770 N 84.763 E 33 N 4.5 1.0 27 XIZANG21 07 10 31.0? 15.42 N 61.37 W 175 ? 0.6 9 LEEWARD ISLANDS21 87 27 28.0% 39.163 N 27.546 E 10 G 0.6 5 TURKEY. MD 2.7 (ISK).21 08 17 53.6% 39.405 N 30.186 E 10 G 0.9 6 TURKEY. MD 2.9 (ISK).21 08 54 36.3% 39.771 N 29.530 E 10 G 1.0 5 TURKEY. MD 2.6 (ISK).21 89 15 19.1 41.114 N 22.477 E 10 G 0.7 11 NORTHWESTERN BALKAN REGION. ML 2.5 (SKO). 2.2 (THE).21 89 46 12.4? 10.79 N 62.21 W 10 G 0.8 5 NEAR COAST OF VENEZUELA. MD 3.2 (TRN).21 89 58 37.5* 50.619 N 18.898 E 10 G 0.8 8 POLAND. ML 2.6 (BRA).21 18 88 51.1* 3.881 S 134.385 E 33 N 5.1 1.3 5 IRIAN JAYA REGION. INDONESIA21 11 83 34.54 60.818 N 152.772 W 95 39 SOUTHERN ALASKA. <AEIC>.21 11 12 03.34 62.801 N 148.646 W 62 53 CENTRAL ALASKA. <AEIC>. ML 2.6 (AEIC).21 11 48 58.0* 21.505 S 66.835 W 234 « 3.7 1.5 14 SOUTHERN BOLIVIA21 12 04 59.1 50.399 N 5.948 E 18 G 0.6 12 BELGIUM. ML 3.0 (LOG), 2.7 (UCC).21 12 13 26.1? 50.85 N 6.20 E 10 G 1.2 4 GERMANY

a 21 12 58 31.5 0.812 S 123.686 E 149 D 5.1 1.1 144 MINAHASSA PENINSULA, SULAWESI. Mw 5.2 (HRV).21 13 12 39.1? 26.31 S 27.47 E 5 G 0.5 4 REPUBLIC OF SOUTH AFRICA21 13 18 12.8? 17.73 S 178.53 W 607 « 4.5 0.7 13 FIJI ISLANDS REGION21 13 33 44.0* 40.051 N 25.411 E 10 G 1.4 6 AEGEAN SEA21 13 56 32.8 41.210 N 21.969 E 10 G 0.7 9 NORTHWESTERN BALKAN REGION. ML 1.8 (SKO).21 14 30 20.2% 26.940 S 26.763 E 5 G 0.8 7 REPUBLIC OF SOUTH AFRICA. ML 2.3 (PRE).21 16 31 34.5? 10.07 N 69.99 W 5 G 0.8 4 VENEZUELA21 16 43 52.5* 38.937 S 178.910 E 97 ? 1.1 20 OFF E. COAST OF N. ISLAND, N.Z.21 16 54 82.9 43.089 N 27.428 E 29 3,9 0.9 78 BULGARIA. ML 4.4 (THE), 4.1 (TTG). Felt (IV) in the

Pravad i ya area. 21 16 57 36.9 20.018 N 121.954 E 48 * 4.4 4.0 1.4 40 PHILIPPINE ISLANDS REGION. Felt (II FF) at Basco,

PAGE 15 APR 1993

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ALBANIA. ML 2.2 (TTG).KODIAK ISLAND REGION. <AEIC>.NEAR COAST OF CENTRAL CHILE. MD 3.8 (SAN).EASTERN HONSHU. JAPANNEAR COAST OF PERUTURKEY. MD 3.5 (ISK). ML 3.1 (CSS) .SOUTHERN ALASKA. <AEIC>.GREECE. ML 3.1 (ATH) .MACQUAR I E ISLANDS REGION. Mw 5.4 (HRV).KURIL ISLANDSCOOK STRAIT. NEW ZEALANDALBANIA. ML 2.4 (TTG).CRETE. MD 4.3 (HLW).ADMIRALTY ISLANDS REGION. P.N.G.STRAIT OF GIBRALTAR. mbLg 3.7 (MOD).MENDOZA PROVINCE, ARGENTINATURKEY. MD 3.8 (ATH), 3.6 (ISK). ML 3.9 (THE).CYPRUS REGION. MD 3.6 (ISK). ML 3.6 (CSS).NORTHWESTERN BALKAN REGIONFIJI ISLANDS REGIONSOUTHERN ALASKA. <AEIC>.REPUBLIC OF SOUTH AFRICA. ML 2.7 (PRE).NORTHERN ITALY. ML 1.4 (GEN).NORTHWEST OF KURIL ISLANDSTURKEY. MD 3.6 (ISK).NORTHERN ITALY. ML 1.8 (VIE).NORTHWESTERN BALKAN REGION. MD 2.7 (TRI).SOUTHERN GREECE. ML 3.7 (ATH). 3.6 (THE).CHILE-ARGENTINA BORDER REGION. MD 4.4 (SAN).MENDOZA PROVINCE. ARGENTINA. MD 4.6 (SAN). Felt (III)at Mendaza.NORTHERN NORWAY. MD 2.7 (BER).GREECE. ML 1.9 (THE).GREECE. ML 1.8 (THE).SOUTH OF ALASKA. ML 3.8 (AEIC).SAN JUAN PROVINCE, ARGENTINASOUTHERN CALIFORNIA. <PAS-P> . ML 2.9 (PAS), 2.8 (GS).Felt (IV) at Farest Falls. Also felt at Highland.GREECE. ML 1.9 (THE).CENTRAL ALASKA. <AElC>. ML 2.5 (AElC).GERMANY. ML 2.1 (UCC) .NORTHERN ITALY. ML 1.5 (GEN).TURKEY. MD 3.1 (ISK).AFGHANISTAN-TAJIKISTAN BORD REG.WESTERN IDAHO. ML 3.9 (GS), 4.6 (BUT). Felt (III) atClayton and (II) at Challis.BULGARIA. ML 3.1 (THE).NORTHWESTERN BALKAN REGION. ML 3.4 (TTG).SOUTHERN NORWAY. MD 2.6 (BER).NEW IRELAND REGION, P.N.G.NORTHWESTERN BALKAN REGION. ML 2.1 (THE), 1.7 (SKO).SOUTH OF ALASKA. ML 3.5 (AEIC).SOUTHERN ALASKA. <AEIC>. ML 2.9 (AEIC), 3.0 (PMR) . Felt(III) at Skwentna.REPUBLIC OF SOUTH AFRICA. ML 2.2 (PRE).CHILE-ARGENTINA BORDER REGION. MD 3.7 (SAN).NORTHERN ITALY. ML 2.6 (GEN).NORTHWEST OF MADAGASCARNORTHERN ITALY. ML 1.8 (GEN).SAN JUAN PROVINCE, ARGENTINA. MD 3.6 (SAN).SAN JUAN PROVINCE, ARGENTINA. MD 3.9 (SAN).AEGEAN SEA. ML 2.5 (THE).MINDANAO. PHILIPPINE ISLANDSREPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).REPUBLIC OF SOUTH AFRICA. ML 3.2 (PRE). mbLg 3.2 (BUL).MENDOZA PROVINCE. ARGENTINA. MD 4.2 (SAN).80N I N ISLANDS REGIONGREECE. ML 1.9 (THE).SOUTHERN ALASKA. ML 3.1 (PGC). 2.9 (AEIC).NEAR COAST OF CENTRAL CHILE. MD 3.8 (SAN).GERMANY. MD 2.6 (UCC).GERMANY. ML 2.7 (STR). 2.4 (UCC).SICILYSICILYGREECE. ML 2.1 (THE).OFF E. COAST OF N. ISLAND, N.Z.SICILYRYUKYU ISLANDSSWITZERLAND. ML 2.1 (LOG).CORSICA. ML 2.2 (LOG). 2.1NORTHWESTERN BALKAN REGIONEASTERN NEW GUINEA REG.. P.N.G.JORDAN - SYRIA REGION. ML 3.6 (JER). Felt In theGalilee region, Israel.DODECANESE ISLANDS. MD 4.3 (HLW).SOUTHERN ITALYEASTERN MEDITERRANEAN SEA. ML 3.5 (CSS).SWITZERLAND. ML 2.3 (LOG).REPUBLIC OF SOUTH AFRICA. ML 2.7 (PRE).GREECE. ML 3.6 (ATH). 3.4 (THE).REPUBLIC OF SOUTH AFRICA. ML 2.8 (PRE).CENTRAL CALIFORNIA. <BRK>Ber k« I «y .

(GEN). ML 1 7 (TTG).

ML 2.4 (BRK). Felt ot

PAGE 17 APR 1993

24 66 24 38.7 66.198 N 141.147 W 5 G 8.5 15 SOUTHEASTERN ALASKA. ML 2.6 (AEIC), 2.6 (PGC).24 66 37 39.9? 38.76 N 23.51 E 16 G 6.1 7 GREECE. ML 2.9 (THE).24 68 16 41.1? 36.37 N 76.38 E 222 ? 4.9 6.7 16 HINDU KUSH REGION, AFGHANISTAN24 68 32 21.9 46.876 N 26.856 E 16 G 6.9 8 GREECE-ALBANIA BORDER REGION. ML 2.4 (THE), 2.2 (SKO).24 68 36 67.15C 33.468 S 76.266 W 116 G 6.2 9 CHILE-ARGENTINA BORDER REGION. MD 3.4 (SAN).24 68 46 33.6* 63.277 N 151.256 W 16 G 1.5 7 CENTRAL ALASKA. ML 2.9 (PMR), 2.4 (AEIC).24 69 66 17.4* 42.585 N 143.728 E 86 » 3.8 6.5 9 HOKKAIDO, JAPAN REGION24 69 68 62.4 42.461 S 174.224 E 28 6.4 22 OFF E. COAST OF S. ISLAND, N.Z. ML 3.9 (WEL).24 69 19 19.1 17.547 S 71.119 W 92 » 4.4 6.8 11 NEAR COAST OF PERU24 89 23 54.6 32.645 S 69.662 W 141 * 6.3 17 MENDOZA PROVINCE, ARGENTINA. MD 4.2 (SAN).24 69 54 21.6 17.871 S 179.849 E 599 D 9.5 1.1 434 FIJI ISLANDS. Mw 6.3 (HRV). mb 5.4 (BRK).24 16 38 36.1 81.577 N 3.693 W 16 G 4.9 1.6 94 NORTH OF SVALBARD24 16 49 66.4* 26.946 S 177.862 W 382 4.7 1.3 39 FIJI ISLANDS REGION24 11 23 55.7 42.954 N 18.613 E 5 G 1.1 41 NORTHWESTERN BALKAN REGION. ML 3.4 (TTG), 3.6 (TIR).

Felt at Metkovic. Croatia.24 12 89 23.15C 18.485 N 66.172 W 66 G 6.3 7 PUERTO RICO REGION24 12 45 61.4? 48.63 N 24.53 E 16 G 8.1 4 AEGEAN SEA. ML 2.6 (THE).24 13 45 61.65C 42.973 N 18.832 E 16 G 6.6 9 NORTHWESTERN BALKAN REGION. ML 2.3 (TTG).24 14 66 11.6 7.179 S 129.649 E 127 5.8 6.9 38 8ANDA SEA24 14 13 42.14 59.866 N 148.626 W 9 65 KENAI PENINSULA, ALASKA. <AEIC>. ML 3.5 (AEIC).24 15 23 14.75C 39.672 N 27.568 E 16 G 6.5 9 TURKEY. MD 3.6 (ISK).24 15 45 37.9 11.926 N 124.124 E 43 » 4.6 4.1 1.1 37 LEYTE, PHILIPPINE ISLANDS24 16 25 26.7? 31.67 S 68.98 W 96 ? 6.2 5 SAN JUAN PROVINCE, ARGENTINA24 17 67 14.6? 31.19 S 64.52 W 97 ? 6.9 6 CORDOBA PROVINCE. ARGENTINA24 17 56 16.951 26.894 S 26.756 E 5 G 6.9 7 REPUBLIC OF SOUTH AFRICA. ML 2.5 (PRE).24 17 53 23.75C 32.819 S 76.916 W 76 G 6.2 8 CHILE-ARGENTINA BORDER REGION. MD 3.2 (SAN).24 19 11 48.95C 39.164 N 113.552 E 33 N 1.1 6 NORTHEASTERN CHINA. ML 3.5 (BJI).24 19 45 33.45C 39.639 N 23.338 E 16 G 8.5 6 AEGEAN SEA. ML 2.3 (THE).24 26 23 58.5 42.925 N 19.864 E 16 G 8.3 9 NORTHWESTERN BALKAN REGION. ML 2.4 (TTG).24 28 36 16.5 27.672 N 57.865 E 33 N 4.7 4.1 8.9 94 SOUTHERN IRAN24 26 58 11.9* 35.446 N 28.263 E 87 * 3.6 1.1 16 EASTERN MEDITERRANEAN SEA24 21 62 67.5 46.844 N 22.966 E 16 G 8.5 8 GREECE. ML 2.1 (THE), 1.9 (SKO).24 21 63 53.5? 18.81 N 66.74 W 78 ? 8.3 7 PUERTO RICO REGION24 21 51 41.1? 17.63 N 62.12 W 49 ? 8.4 8 LEEWARD KSLANDS. MD 3.7 (TRN).24 22 13 32.6« 34.917 S 179.824 W 33 N 4.7 8.6 16 SOUTH OF KERMADEC ISLANDS24 23 36 49.24 63.669 N 156.792 W 138 2.7 69 CENTRAL ALASKA. <AEIC>.25 66 67 68.7 15.679 S 172.966 W 33 N 5.4 5.7 1.1 177 SAMOA ISLANDS REGION. Mw 6.6 (HRV). Mo-1.6*16»*18 Nm

(PPT).25 61 49 27.5? 37.36 N 16.29 E 33 N 1.5 6 IONIAN SEA25 62 67 59.7* 4.866 N 128.826 E 33 N 4.7 1.3 22 NORTH OF HALMAHERA, INDONESIA25 03 34 27.8 42.856 N 2.174 E 16 G 6.6 14 PYRENEES. ML 2.9 (LDG).25 63 37 18.3* 42.827 N 2.147 E 16 G 8.5 5 PYRENEES. ML 2.5 (LDG).25 03 44 59.2 42.848 N 2.382 E 16 G 6.8 14 PYRENEES. ML 3.4 (LDG). MD 3.2 (BTH). mbLg 3.6 (MDD).

Felt (IV) ot Ouillon, France.25 04 62 33.64 59.121 N 153.245 W 86 41 SOUTHERN ALASKA. <AEIC>.25 64 56 14.2* 45.984 N 151.267 E 48 D 4.7 1.0 24 KURIL ISLANDS25 65 16 81.6 46.651 N 21.723 E 16 G 6.9 9 GREECE. ML 2.5 (THE).25 65 43 86.3 5.557 S 154.369 E 151 4.9 6.9 45 SOLOMON ISLANDS25 05 43 56.9 27.560 N 139.956 E 468 * 4.9 6.9 126 BONIN ISLANDS REGION25 66 48 46.5? 39.5B N 123.62 E 33 N 6.6 4 NORTHEASTERN CHINA. ML 4.1 (BJI).25 67 67 25.2* 24.268 S 67.636 W 266 * 8.6 7 CHILE-ARGENTINA BORDER REGION25 67 28 26.4% 42.369 N 19.917 E 16 G 6.5 8 NORTHWESTERN BALKAN REGION. ML 1.8 (TTG).25 67 43 15.351 28.126 S 26.877 E 5 G 1.3 7 REPUBLIC OF SOUTH AFRICA. ML 2.5 (PRE).25 67 56 22.3? 15.55 N 95.34 W 39 ? 3.6 1.4 16 NEAR COAST OF OAXACA, MEXICO25 68 21 81.7* 3.168 S 149.636 E 33 N 4.7 8.9 8 BISMARCK SEA25 69 29 56.3 35.624 N 112.147 W 16 G 5.6 4.5 1.2 116 WESTERN ARIZONA. Some minor damage at Tusoyon, Voile

ond Pipe Spring Notional Monument. Felt (V) ot Grand Canyon and Jerome; (IV) ot Ash Fork, Flagstaff, Fredonio, Porks, Poulden, Seligman ond Winslow; (III) ot Bogdod, Bullhead City, Comeron, Chlnle, Colorado City, Cottonwood, Kirklond, Munds Pork ond Peach Springs; (II) ot Williams. Felt (IV) ot Bryce, Utah ond (III) ot Kanob, Utah. Also felt at St. George and Tropic, Utah. Felt from southern Utah to Phoenix, Ar i zono.

25 69 49 66.64 62.974 N 156.827 W 112 49 CENTRAL ALASKA. <AEIC>.25 16 25 45.7? 26.39 S 27.38 E 5 G 6.2 4 REPUBLIC OF SOUTH AFRICA. ML 2.5 (PRE).25 16 49 86.84 59.862 N 151.456 W 47 41 KENAI PENINSULA, ALASKA. <AEIC>. ML 2.7 (AEIC).25 16 56 83.2 44.233 N 11.227 E 16 G 6.7 9 NORTHERN ITALY. MD 2.6 (TRI).25 11 48 32.4 58.547 N 142.745 W 16 G 6.5 36 GULF OF ALASKA. ML 2.6 (AEIC).25 12 11 65.8? 18.62 N 65.67 W 24 * 6.4 7 PUERTO RICO REGION25 13 29 57.65C 33.626 S 71.673 W 33 N 6.3 8 NEAR COAST OF CENTRAL CHILE. MD 3.2 (SAN).25 14 61 52.5? 39.35 N 29.65 E 16 G 6.3 4 TURKEY. MD 2.6 (ISK).25 14 29 31.6* 31.456 S 68.634 W 113 ? 1.2 16 SAN JUAN PROVINCE, ARGENTINA25 14 34 82.8* 37.376 N 71.726 E 33 N 4.6 6.8 5 AFGHANISTAN-TAJIKISTAN 80RD REG.25 14 44 19.5% 15.378 N 66.464 W 33 N 8.6 8 LEEWARD ISLANDS. ML 2.9 (FDF).25 14 51 32.9* 46.274 N 8.432 E 16 G 8.1 7 SWITZERLAND. ML 2.3 (LDG).25 14 54 14.9* 36.514 N 71.445 E 38 ? 4.4 1.3 15 AFGHANISTAN-TAJIKISTAN BORD REG.25 15 46 44.9% 15.941 N 66.817 W 22 8.3 8 LEEWARD ISLANDS. ML 2.6 (FDF).25 15 46 45.7% 18.682 N 161.396 W 33 N 6.6 8 GUERRERO, MEXICO25 16 55 14.44 59.669 N 152.643 W 72 39 SOUTHERN ALASKA. <AEIC>.25 17 11 17.9? 39.19 N 23.35 E 16 G 6.2 4 AEGEAN SEA. ML 1.8 (THE).25 17 42 48.7 1.897 S 145.753 E 33 N 5.1 5.3 1.2 74 ADMIRALTY ISLANDS REGION, P.N.G. Mw 5.5 (HRV).25 17 51 47.5 34.188 S 72.512 W 11 6.7 13 NEAR COAST OF CENTRAL CHILE. MD 4.2 (SAN).25 18 66 44.3 26.529 S 176.265 W 225 * 4.9 1.6 76 FIJI ISLANDS REGION25 19 26 12.9* 34.625 S 71.292 W 66 G 6.7 8 NEAR COAST OF CENTRAL CHILE25 19 25 54.6 35.377 N 28.622 E 79 3.5 1.6 26 EASTERN MEDITERRANEAN SEA. MD 4.6 (ATH).25 19 32 55.5* 5.997 N 126.669 E 92 * 4.2 6.7 13 MINDANAO. PHILIPPINE ISLANDS25 19 46 21.6% 26.376 S 27.496 E 5 G 6.8 7 REPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).25 19 44 28.5 35.352 N 28.668 E 68 * 3.8 1.1 26 EASTERN MEDITERRANEAN SEA. MD 4.2 (ATH).25 26 67 41.2? 34.47 S 76.52 W 118 G 8.1 8 CHILE-ARGENTINA BORDER REGION. MD 3.4 (SAN).25 26 18 42.24 61.211 N 152.247 W 123 52 SOUTHERN ALASKA. <AEIC>.25 21 59 47.7 36.689 N 49.796 E 33 N 4.3 1.1 14 WESTERN IRAN

APR 1993 PAGE 18

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PAGE 19 APR 1993

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MD 4.2 (APY). Felt (V) at1.0 53 NEAR COAST OF NICARAGUA.

28 23 52 52.1* 32.241 S29 00 07 46.87 17.838 N29 00 42 42.4 30.684 S29 00 48 37.2& 33.961 N

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2.8 (TRI). Felt (IV) at Ferlach, Austria. Felt (IV) at Jesenice, Slovenia.

1.1 22 CRETE0.9 5 PERU-BRAZIL BORDER REGION0.6 7 SAN JUAN PROVINCE, ARGENTINA0.3 6 SAN JUAN PROVINCE, ARGENTINA1.3 44 CHILE-BOLIVIA BORDER REGION0.5 6 TURKEY. MD 2.7 (ISK).0.9 97 KURIL ISLANDS

29 NEW MADRID. MISSOURI REGION. <SLM-P>. MD 3.5 (SLM). mbLg 3.6 (GS). Felt (IV) at Bogota, Covington, Flnley. Lenox, Newbern and Ridgely, Tennessee. Also felt (IV) at CaruthersviI Ie, Missouri. Felt (III) at Samerville, Tigrett and Trimble, Tennessee; Steele, Missouri and Leachville, Arkansas. Felt at Dyersburg, Tennessee.

0.5 6 MENDOZA PROVINCE, ARGENTINA0.4 7 PUERTO RICO REGION1.1 23 NEAR COAST OF CENTRAL CHILE. MD 4.5 (SAN).

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SOUTHERN ALASKA. <AEIC>.SOUTH OF KERMADEC ISLANDSSOUTHERN ALASKA. <AEIC>.SOUTH OF KERMADEC ISLANDSMONA PASSAGETURKEY. MD 2.6 ( ISK).SOUTHERN ALASKA. <AEIC>.SOUTHERN ALASKA. <AEIC>.NORTHERN CHILETURKEY. MD 2.8 ( ISK).TURKEY. MD 2.7 (ISK).COLORADO. ML 2.5 (GS).SOUTHERN GREECE. ML 4.7 (TIR), 4.6 (TTG). 4.4 (ATH),4.3 (THE). Felt ot Pirgos ond Ilio.WESTERN ARIZONA. Mw 5.3 (HRV). Some damage at BigWater, Utah and additional damage at Pipe SpringsNational Monument. Slight damage (V) in the Flagstaffarea and short power outages at Grand Canyon Village,Tusayan and Voile. Felt (V) at Ash Fork, Bellemont,Clarkdale, Cottonwood, Parks, Peach Springs and Sedona;(IV) at Fredania, Gray Mountain, Jerome, Page, Paul den,Seligman, Williams and Winslow; (III) at Chinle,Chloride, Colorado City, Cornville, Grand Canyon,Kirklond and Pin«. Felt (V) ot Bryce, Cedar City, Konoband Springdale, Utah; (IV) at Hurricane and Tropic,Utah. Felt at Lake PoweI I, Orderville, Rockville andSt. George, Utah. Also felt at Cottonwood Cove, LasVegas, Overton and Searchlight, Nevada.TURKEY. MD 2.8 ( ISK) .MENDOZA PROVINCE, ARGENTINANEAR SOUTH COAST OF FRANCE. ML 3.0 (LOG), 2.5 (GEN).SOUTHERN GREECE. MD 3.3 (ATH).GREECE. ML 2.0 (THE).FIJI ISLANDS REGIONFINLANDNORTHERN ITALY. ML 2.0 (GEN).NORTHERN ITALY. ML 2.0 (GEN).BULGARIACENTRAL CALIFORNIA. <GM-P>. MD 3.4 (GM). ML 3.7 (BRK),3.3 (GS).TURKEY. MD 2.7 ( I SK).WESTERN ARIZONA. ML 2.7 (GS).TURKEY. MD 2.8 (ISK).TURKEY. MD 3.0 (ISK) .CENTRAL ITALYTURKEY. MD 2.8 (ISK).WESTERN ARIZONA. ML 3.3REPUBLIC OF SOUTH AFRICA.TURKEY. MD 2.8 ( ISK) .GREECE. ML 1.9 (THE).ROMANIANORTH OF SVALBARDGREECE-ALBANIA BORDER REGION. ML 2.6 (THE).NORTHERN SUMATERA, INDONESIAWESTERN ARIZONA. ML 3.6 (GS).WEST OF MACOUARIE ISLANDCENTRAL ITALYNORTHWESTERN BALKAN REGION. ML3.5 (TIR). Felt (IV) ot Skopje,VANUATU ISLANDSCENTRAL ITALYNORTHERN MID-ATLANTIC RIDGENEAR COAST OF NORTHERN CHILEHINDU KUSH REGION, AFGHANISTANSOUTH OF JAWA, INDONESIAAEGEAN SEA. ML 3.1 (THE).NORTHERN ITALY. ML 2.5 (LOG).CHILE-ARGENTINA BORDER REGIONPOLAND. ML 3.2 (GRF), 3.2 (VIE).SPAIN. mbLg 2.8 (MOD).GREECE. ML 3.1 (THE).GREECE. MD 3.4 (ATH).SOUTH OF KERMADEC ISLANDSAEGEAN SEA. MD 3.6 (ISK). ML 3.4 (THE).PHILIPPINE ISLANDS REGIONSAN JUAN PROVINCE, ARGENTINATURKEY. MD 2.8 (ISK).AUSTRIA. ML 1.6 (VIE).CENTRAL MID-ATLANTIC RIDGECENTRAL MID-ATLANTIC RIDGE. Mw 5.4 (HRV).OFF EAST COAST OF HONSHU, JAPANGREECE. ML 2.0 (THE).TURKEY. MD 2.7 ( ISK).MID-INDIAN RIDGENEAR EAST COAST OF KAMCHATKA.at PetropavIavsk-Kamchatskiy.TURKEY. MD 2.8 ( ISK).SAN JUAN PROVINCE. ARGENTINAAEGEAN SEA. MD 3.3 (ISK).VERACRUZ, MEXICONEAR COAST OF GUATEMALA. Mw 5.1 (HRV). MD 4.5 (GCG).NORTHERN ITALYNORTH ISLAND, NEW ZEALAND

(GS).ML 2.8 (PRE). mbLg 2.8 (BUL).

3.8 (TTG). 3.6 (THE). YugosIav ia.

Mw 5.0 (HRV). Fel t (III)

PAGE 21 APR 1993

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NORTHWESTERN BALKAN REGION. ML 2NORTHWESTERN BALKAN REGION. ML 2DODECANESE ISLANDS. MD 3.8 (ATM)NORTH ISLAND. NEW ZEALANDBANDA SEA. Mw 4.9 (HRV).DODECANESE ISLANDS. MD 3.5DODECANESE ISLANDS. MD 3.4DODECANESE ISLANDS. MDVERACRUZ, MEXICODODECANESE ISLANDS. MDAEGEAN SEAGULF OF ALASKA. <AEIC>CRETENORTHWESTERN BALKAN REGION. ML 2.3 (TTG).GREECE. ML 2.4 (THE).SOUTHERN NORWAY. MD 1.7 (BER).NEAR COAST OF VENEZUELATURKEY. MD 2.9 (ISK).DODECANESE ISLANDSNEAR SOUTH COAST OF FRANCE. ML 2.1 (LOG).GREECE. ML 3.0 (THE).FIJI ISLANDS REGIONGUERRERO, MEXICOTURKEY. MD 3.7 (ISK).VIRGIN ISLANDSGUERRERO. MEXICOTURKEY. MD 3.0 (ISK).

1 (THE). 2.0 (SKO) 5 (THE). 2.3 (SKO) 3.7 (ISK).

ADDITIONAL SOURCE PARAMETERS

01 06 11 16.12 19.923S 177.538W 406km5.4mb ( 68 obs. )FIJI ISLANDS REGIONCENTROID, MOMENT TENSOR (HRV)Dota Used: GDSNL.P.B.: 37S. 75CCent roi d Locot i on:Origin Time 06:11:19.2 0.2Lot 19.74S 0.63 Lon 177.46W 0.03Dep 404.0 1.3 Hoif-duration 1.8Pr i nc i pa I Axes:

Scole 10««17 NmT Vol- 4.39 Pig- 1 Azm-217 N 0.10 57 126 P -4.48 33 307

Best Double Coup Ie:Mo-4.4*10** 17 NP1:Strike-347 Dip-67 Slip- -24 NP2: 87 68 -155

01 16 30 11.12 23.232N 94.498E 105km5.3mb (119 obs.)MYANMAR-INDIA BORDER REGIONCENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 12S. 15CCent ro i d Locot i on:Origin Time 16:30:11.21.1Lot 23.55N 0.11 Lon 94.00E 0.09Dep 107.0 FIX Hoif-durotion 1.0PrInc i poI Axes:

Scale 10**16 NmT Val- 4.95 Pig-25 Azm- 59 N 1.47 43 174 P -6.42 37 309

Best Double Coop Ie:Mo-5.7»10*»16 NP1: Strike- 99 Dip-44 Slip 169 NP2: 1 83 -46

02 01 56 31.36 17.840S 177.073W 362km5.4mb ( 61 obs.)FIJI ISLANDS REGIONCENTROID. MOMENT TENSOR (HRV)Dota Used: GDSNL.P.B.: 40S. 75CCent ro i d Locot i on:Origin Time 01:56:38.7 0.3Lot 17.44S 0.03 Lon 176.79W 0.02Dep 391.5 1.3 Ho If-duration 1.7Pr i nc i poI Axes:

Scole 10**17 NmT Val- 3.96 Pig-24 Azm-222 N -0.33 59 0 P -3.63 18 123

Best Double Coup Ie:Mo-3.8*10»»17 NP1:Strike-261 Dip-59 Slip- 176 NP2: 354 86 31

02 08 04 11.77 17.373S 171.921W 9km 5.8mb ( 81 obs.) 5.6Msz ( 43 obs.) TONGA ISLANDS REGION FAULT PLANE SOLUTION: P-Woves NP1:Strike-205 Dip-67 Slip- -90

NP2: 25 23 -90Pr i nc i poI Axes:

T Pig-22 Azm-295 P 68 115

Comment: The focal mechanism is poorly controlled and corresponds to normal faulting. The preferred fault plane i s NP1.

RADIATED ENERGYNo. of sta: 13 Focal mech. F Energy 7.0±1.4»10««12 Nm

MOMENT TENSOR SOLUTIONDep 6 No. of sto: 19Pr i nc i poI Axes:

Scole 10»«17 Nm T Vol- 10.22 Pig- 7 Azm-289 N -0.47 14 21 P -9.75 74 172

Best Double Coup Ie:Mo-1.9*19»»18 NP1:Strike- 3 Dip-40 Slip 112 NP2: 211 54 -73

CENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 39S. 92CCentroid Location:Origin Time 08:04:19.0 0.2Lot 17.17S 0.02 Lon 171.59W 0.02Dep 15.0 BDY Ho If-durotion 2.3Pr i nc i poI Axes:

Scole 10**17 Nm T Vol- 7.84 Pig- 8 Azm-267 N -0.87 15 359 P -6.97 73 149

Best Double Coup Ie:Mo-7.4»10»*17 NP1:Strike-340 Dip-39 Slip 114 NP2: 190 55 -72

02 14 32 19.09 18.423N 145.221E 501km5.2mb ( 90 obs.)MARIANA ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 28S, 44CCent ro i d Locoti on:Origin Time 14:32:22.4 0.5Lot 18.67N 0.05 Lan 145.30E 0.03Dep 486.1 3.0 Half-durotion 1.3Pr i ncI pa I Axes:

Scole 10*»17 Nm T Vol- 1.51 Pig-25 Azm-244 N 0.07 29 140 P -1.59 50 8

Best Double Coup Ie:Mo-1.5*10**1 7 NP1:Strike- 18 Dip-33 Slip- -27 NP2: 131 76 -120

02 20 23 22.94 57.395N 33.300W 17km 5.1mb ( 78 obs.) 5.0Msz ( 24 obs.) NORTH ATLANTIC OCEAN CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN

L.P.B.: 29S, 44CCent roi d Locoti on:Origin Time 20:23:27.4 0.5Lot 57.34N 0.08 Lon 33.25W 0.10Dep 15.0 FIX Hoif-duration 1.0Pr i nc i poI Axes:

Scole 10**16 Nm T Vol- 6.91 Pig- 3 Azm-105 N 0.09 13 14 P -7.01 77 208

Best Double Coup Ie:Mo-7.0*10** 1 6 NP1:Strike-208 Dip-43 Slip- -71 NP2: 3 49 -107

04 17 21 36.20 53.443N 164.520W 33km5.0mb ( 81 obs.) 4.8Msz ( 18 obs.)UNIMAK ISLAND REGIONCENTROID. MOMENT TENSOR (HRV)Dota Used: GDSNL.P.B.: 23S, 36CCent roi d Locat i on:Origin Time 17:21:37.8 0.6Lot 53.33N 0.09 Lon 164.92W 0.12Dep 29.2 5.2 Ho If-doration 1.0Pr i nc i poI Axes:

Scale 10**17 Nm T Vol- 1.12 Pig-52 Azm-329 N 0.17 2 61 P -1.29 38 153

Best Double Coup Ie:Mo-1.2*19»* 1 7 NP1:StrIke-258 Dip- 7 Slip- 107 NP2: 61 83 88

04 23 65 17.79 13.383N 126.551E 62km5.4mb ( 74 obs.)MINDORO. PHILIPPINE ISLANDSCENTROID. MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 12S. 14CCentroid Location:Origin Time 23:65:17.1 1.2Lot 13.07N 0.11 Lon 120.B1E 0.14Dep 53.0 FIX Half-duration 1.0Pr i nc i pa I Axes:

Scole 10*»16 Nm T Val- 4.29 Pig-79 Azm-148 N 2.25 11 335 P -6.53 1 245

Best Double Coup Ie:Mo-5.4*10**16 NP1:Strike-324 Dip-45 Slip- 74 NP2: 165 47 105

05 04 00 05.39 59.801S 26.312W 33km 6.0mb ( 34 obs.) 6.2Msz ( 69 obs.) SOUTH SANDWICH ISLANDS REGION FAULT PLANE SOLUTION: P-Woves NP1:Strike-258 Dip-72 Slip- -90 NP2: 78 18 -90

Pr i nc i pal Axes:T Pig-27 Azm-34B P 63 168

Comment: The focol mechanism is

APR 1993 PAGE 22

poorly controlled and corresponds to normal faulting. The preferred fault pi one is NP1.

MOMENT TENSOR SOLUTIONOep 9 No. of sto: 7Pr i nc i pa I Axes:

Scale ie»*18 NmT Val- 3.39 Pig-35 Azm- 2 N 6.09 e 92 P -3.47 55 182

Beet Double Couple:Ma-3.4*10**18 NP1:Strike- 91 Dip-10 Slip- -90 NP2: 272 80 -90

CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 41S, *«C M.W.: 29S, 50CCentroid Location:Origin Time 04:00:12.6 0.1Lot 60.47S 0.02 Lan 25.69W 0.02Dep 18.4 8.7 Half-duration 3.1Pr i nc i pa I Axes:

Scale 10»*18 NmT Val- 2.20 Pig-16 Azm-308 N 0.21 38 51 P -2.42 48 199

Best Double Couple:Mo-2.3*10*«18 NP1:Strike-357 Dip-44 Slip 152 NP2: 246 71 -50

05 06 49 16.92 57.342N 33.224W 10km5.3mb ( 94 obs.) 5.1Msz ( 25 obs.)NORTH ATLANTIC OCEANCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 19S, 32CCentroid Location:Origin Time 06:49:19.5 0.7Lot 57.74N 0.12 Lon 32.66W 0.09Dep 15.0 FIX Half-duration 1.2Pr i nc i pa I Axes:

Scale 10««16 NmT Vol- 18.83 Pig- 0 Azm-107 N -1.95 0 17 P -8.89 90 180

Best Double Couple:Mo-9.9*10**16 NP1:Strike-197 Dip-45 Slip- -90 NP2: 17 45 -90

05 16 51 39.74 59.787S 26.203W 33km 5.7mb ( 28 obs.) 5.8Msz ( 33 obs.) SOUTH SANDWICH ISLANDS REGION CENTROID. MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 40S. 80C Cent raid Locot i on: Origin Time 16:51:44.5 0.2 Lat 60.04S 0.03 Lan 25.92W 0.06 Dep 38.9 2.3 Half-duration 1.6 Pr i nc i pa I Axes:

Scale 10««17 Nm T Vol- 3.68 Pig-49 Azm- 80 N -0.61 2 348 P -3.06 40 256

Best Double Couple:Mo-3.4*10**17 NP1:Strike-322 Dip- 5 SIip- 65 NP2: 168 85 92

06 00 59 13.67 45.481N 150.711E 47km5.2mb (114 obs.) 4.7Msz ( 21 obs.)KURIL ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 15S, 25CCent raid Locot i on:Origin Time 00:59:20.3 1.5Lat 45.72N 0.11 Lon 150.98E 0.12Dep 50.9 4.8 Half-duration 1.3Pr i nc i pa I Axes:

Scale 10«*16 NmT Vol- 6.85 Pig-70 Azm-285 N 1.90 8 38 P -8.75 18 131

Best Double Couple:Mo-7.8*10**16 NP1:Strike-233 Dip-28 Slip- 107 NP2: 34 63 81

07 11 22 45.81 35.419S 54.023E 21km 5.2mb ( 16 obs.) 4.6Msz ( 1 obs.) SOUTH INDIAN OCEAN CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 11S, 13C

Cent raid Locoti on: Origin Time 11:22:52.8 0.9 Lot 34.96S 0.17 Lon 54.44E 0.42 Dep 15.0 FIX Half-duration 1.0 Pr i nc i pa I Axes:

Scale 10**16 Nm T Val- 5.57 Pig-33 Azm-190 N 1.88 9 286 P -7.45 55 30

Best Double Couple:Mo-6.5*10««16 NP1:StrIke-249 Dip-15 Slip 128 NP2: 108 79 -81

08 00 20 00.16 24.605S 175.931W 43km5.1mb ( 29 obs.) 5.4Msz ( 2 obs.)SOUTH OF TONGA ISLANDSCENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 24S, 40CCent ro i d Locoti on:Origin Time 00:19:58.6 0.7Lot 24.59S 0.10 Lon 175.21W 0.07Dep 18.8 3.8 Half-duration 1.0Principal Axes:

Scale 10**16 Nm T Val- 6.54 Pig-66 Azm-319 N -0.46 8 210 P -6.08 22 116


08 03 49 33.23 35.653N 77.652E 42km5.0mb ( 77 obs.) 4.6Msz ( 29 obs.)EASTERN KASHMIRCENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 17S, 24CCent ro i d Locat i on:Origin Time 03:49:33.6 1.0Lot 35.81N 0.11 Lon 78.15E 8.09Dep 15.0 FIX Hoif-durotion 1.0Pr i nc i pa I Axes:

Scale 10**16 Nm T Val- 7.21 Pig- 2 Azm-136 N 0.26 68 40 P -7.47 21 227

Best Double Couple:Mo-7.3*10** 16 NP1:Strike-269 Dip-73 Slip- -14 NP2: 4 77 -163

08 12 49 28.71 4.409S 120.124E 31km 5.3mb ( 48 obs.) 4.8Msz ( 14 obs.) SULAWESI. INDONESIA CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 37S. 64C Cent ro i d Locat i on: Origin Time 12:49:35.3 0.4 Lat 4.06S 0.05 Lon 120.72E 0.04 Dep 43.5 2.8 Half-duration 1.2 Pr i nc i poI Axes:

Scale 10**17 NmT Val- 1.10 Pig-88 Azm-269N 0.25 1 22P -1.35 2 112

Best Double Couple:Mo-1.2*10**17NP1:Strike-203 Dip-43 Slip- 91NP2: 22 47 89

08 19 13 10.75 18.222N 71.132W 13km 5.3mb ( 75 obs.) 4.7Msz ( 19 obs.) DOMINICAN REPUBLIC REGION CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 15S. 18C Cent raid Locoti on: Origin Time 19:13:15.81.1 Lat 18.40N 0.11 Lon 71.46W 0.12 Dep 15.0 FIX Half-duration 1.0 Pr i nc i pa I Axes:


Best Double Couple:Mo-6.2*10**16 NP1:Strike-139 Dip- 9 Slip- 131 NP2: 277 83 84

08 20 17 21.35 6.215N 120.230E 46km 5.2mb ( 45 obs.) 4.5Msz ( 9 obs.) SULU ARCHIPELAGO CENTROID, MOMENT TENSOR (HRV)

Doto Used: GDSNL.P.B.: 18S, 26CCent raid Locat i on:Origin Time 20:17:20.4 0.9Lot 6.06N 0.08 Lon 120.35E 0.10Dep 30.6 8.4 Half-duration 1.0Pr i nc i pa I Axes:


Best Double Couple:Mo-6.1*10«»16 NP1:Strike- 4 Dip-57 Slip- 160 NP2: 105 74 35

09 11 35 38.16 14.937N 120.510E 34km 5.6mb ( 97 obs.) 5.6Msz ( 51 abs. ) LUZON. PHILIPPINE ISLANDS CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 30S, 64C Centroid Location: Origin Time 11:35:43.7 0.5 Lot 15.59N 0.04 Lon 120.42E 8.05 Dep 15.0 FIX Half-duration 1.6 Pr i nc i poI Axes:

Scale 10**17 Nm T Vol- 2.92 Pig-23 Azm-218 N -0.81 48 336 P -2.11 33 112

Best Double Couple:Mo-2.5*10**17 NP1:Strike-258 Dip-49 Slip 172 NP2: 163 84 -42

10 09 12 38.86 0.212S 124.385E 39km 5.2mb ( 59 obs.) 4.5Msz ( 4 obs.) SOUTHERN MOLUCCA SEA CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 34S. 63C Cent raid Locat i on: Origin Time 09:12:44.8 0.3 Lot 0.17S 0.83 Lon 124.58E 0.04 Dep 63.7 2.7 Half-duration 1.2 Pr i nc i pa I Axes:


Best Double Couple:Mo-1.3*10««17 NP1:Strike-244 Dip-30 Slip- 121 NP2: 29 65 74

10 13 31 01.32 54.128S 129.650W 10km 4.8mb ( 6 abs.) 4.9Msz ( 6 abs.) PACIFIC-ANTARCTIC RIDGE CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 34S, 58C Cent raid Locot i on: Or igin Time 13:31:11.2 0.2 Lot 54.95S 0.04 Lon 129.13W 0.05 Dep 15.0 FIX Half-duration 1.3 Pr i nc i poI Axes:

Scale 10**17 Nm T Val- 1.65 Pig- 2 Azm-155 N 0.30 70 58 P -1.95 20 246

Best Double Couple:Mo-1.8*10**17 NP1:StrIke-289 Dip-74 Slip- -12 NP2: 22 78 -164

10 21 01 26.55 22.571S 68.948W 116km5.1mb ( 21 abs.)NORTHERN CHILECENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 32S. 50CCent ro i d Lacat i on:Origin Time 21:01:34.2 0.3Lat 22.39S 0.03 Lon 68.80W 0.04Dep 120.8 1.8 Half-duration 1.1Pr i nc i pa I Axes:

Scale 10**16 Nm T Val- 12.30 Pig-24 Azm- 90 N -1.60 13 354 P -10.70 62 238


11 05 08 09.58 1.369N 126.183E 58km 5.2mb ( 52 obs.)

PAGE 23 APR 1993

NORTHERN MOLUCCA SEACENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 35S, 57CCentroid Locotion:Origin Time 05:08:13.9 0.4Lot 1.69N 0.04 Lon 126.43E 0.04Dep 43.8 2.6 Ha If-durotion 1.1Pr i nc i poI Axes:


Best Double Couple:Mo-9.3*10»*16 NP1:Strike-180 Dip-28 Slip- 76 NP2: 15 63 97

11 06 00 56.42 51.287N 178.599W 33km 5.6mb (121 obs.) 4.8Msz ( 40 obs.) ANDREANOF ISLANDS, ALEUTIAN IS. CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 30S, 51C Centroid Location: Origin Time 06:00:58.6 0.4 Lat 51.24N 0.04 Lon 178.44W 0.08 Dep 17.0 8DY Ho If-duration 1.2 Principal Axes:

Scale 10**16 NmT VoI- 12.94 Pig-69 Azm-358N 0.00 7 251P -12.94 20 158

Best Double Coup Ie:Mo-1.3*10*»17NP1:Strike-237 Dip-25 Slip- 74NP2: 74 66 97

11 06 59 48.10 39.744S 176.542E 33km 5.5mb ( 19 obs.) S.SMsz ( 28 obs.) NORTH ISLAND, NEW ZEALAND CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 37S, 83C Cent ro i d Locoti on: Origin Time 06:59:54.1 0.2 Lat 39.68S 0.03 Lon 176.83E 0.04 Dep 22.4 2.1 Half-duration 1.9 Pr i nc i pa I Axes:


Best Double Couple:Mo-4.5*10**17NP1:Strike-215 Dip-15 Slip- 103NP2: 21 76 86

11 11 18 30.37 0.833N 123.825E 284km5.4mb ( 73 obs.)MINAHASSA PENINSULA, SULAWESICENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 25S, 35CCent ro i d Locot i on:Origin Time 11:18:35.7 0.4Lot 1.48N 0.03 Lon 124.15E 0.02Dep 264.0 2.1 Ho If-durotion 1.3P r i nc i poI Axes:


Best Double Coup Ie:Mo-1.5*10*»17 NP1:Strike-335 Dip-12 Slip 166 NP2: 231 87 -78

12 14 00 40.95 28.330N 57.148E 33km5.2mb ( 90 obs.)SOUTHERN IRANCENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 19S, 22CCentroid Location:Origin Time 14:00:52.8 0.9Lat 28.39N FIXjLon 57.15E FIXDep 33.0 FIX Ho If-durotion 1.0Pr i nc i pa I Axes:



13 20 07 16.69 1.196N 126.518E 45km5.5mb ( 68 obs.) 5.0Msz ( 13 obs.)NORTHERN MOLUCCA SEACENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.8.: 35S. 67CCentroid Location:Origin Time 20:07:25.0 0.4Lot 1.30N 0.03 Lon 126.19E 0.64Dep 88.1 1.5 Half-duration 1.9Principal Axes:

Scale 10**17 Nm T Val- 4.50 Pig-10 Azm- 90 N 0.88 76 314 P -5.37 10 182


14 05 58 32.63 51.131N 168.825W 33km 5.6mb (129 obs.) 5.4Msz ( 44 obs.) FOX ISLANDS. ALEUTIAN ISLANDS CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 44S. **C Cent ro id Loca t ion: Origin Time 05:58:33.3 0.1 Lot 51.06N 0.02 Lon 168.65W 0.03 Dep 15.0 BDY Ha If-durotion 2.2 Pr i nc i pa I Axes:

Scale 10**17 Nm T Val- 7.81 Pig- 1 Azm-338 N -0.82 13 248 P -6.99 77 73

Best Double Coup Ie:Mo-7.4*10**17 NP1:Strike- 81 Dip-45 Slip- -72 NP2: 236 47 -107

15 10 32 31.28 16.395S 14.293W 10km 5.6mb ( 81 obs.) 5.2Msz ( 41 obs.) SOUTHERN MID-ATLANTIC RIDGE CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 40S, 77C Centroid Locotion: Origin Time 10:32:40.6 0.3 Lot 16.22S 0.03 Lon 14.61W 0.03 Dep 15.0 FIX Half-duration 1.5 Pr i ncIpoI Axes:

Scole 10**17 Nm T Vol- 2.48 Pig-11 Azm-125 N -0.15 74 352 P -2.33 11 217

Best Double Coup Ie:Mo-2.4*10**17 NP1:Strike-261 Dip-74 Slip- 0 NP2: 351 90 -164

15 13 32 38.21 18.182S 178.092W 457km5.1mb ( 67 obs.)FIJI ISLANDS REGIONCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 37S. 80CCentroid Location:Origin Time 13:32:46.6 0.3Lot 17.85S 0.03 Lon 177.98W 0.02Dep 481.8 1.4 Ha If-durotion 1.7Pr i nci pa I Axes:


Best Double Couple:Mo-3.2*10**17 NP1:Strike- 59 Dip-11 SIip- 71 NP2: 259 80 94

15 16 11 19.81 7.349S 156.129E 27km5.2mb ( 34 obs.) 4.9Msz ( 4 obs.)SOLOMON ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 20S. 26CCentroid Locotion:Origin Time 16:11:24.6 1.1Lot 7.31S 0.12 Lon 156.09E 0.08Dep 18.7 3.7 Ho If-durotion 1.0Pr i nc i pa I Axes:

Scole 10**16 Nm T Vol- 11.70 Pig-60 Azm- 0 N -1.84 20 128 P -9.86 22 226

Best Double Couple:Mo-1.1*10»*17 NP1:Strike-349 Dip-29 Slip- 135

NP2: 120 70 69

15 19 43 41.21 10.300N 125.962E 45km 4.9mb ( 33 obs.) 4.2Msz ( 10 obs.) LEYTE, PHILIPPINE ISLANDS CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 11S, 14C Centroid Location: Origin Time 19:43:43.7 1 .1 Lat 10.07N e.11 Lon 125.93E 0.11 Dep 95.5 9.8 Ha If-durotion 1.1 Pr i nc i poI Axes:


Best Double Couple:Mo-7.1 *10**16 NP1:Strike-108 Dip-57 Slip- -2 NP2: 198 89 -147

15 20 51 33.56 49.189N 156.039E 33km4.8mb ( 46 obs.) 4.6Msz ( 10 obs.)KURIL ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 15S. 20CCentroid Locotion:Origin Time 20:51:42.9 2.1Lat 49.04N 0.13 Lon 156.02E 0.22Dep 20.9 6.0 Ho If durotion 1.0P r i nc i poI Axes:

Scole 10**16 NmT Vol- 4.00 Pig-68 Azm-347 N -1.01 12 224 P -3.00 18 130


16 04 09 19.31 56.212N 155.886W 25km5.3mb ( 82 obs.) 5.1Msz ( 39 obs.)ALASKA PENINSULACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 40S, 80CCentroid Locotion:Origin Time 04:09:24.3 0 . 3Lot 55.90N 0.04 Lon 154.54W 0.05Dep 26.0 FIX Half-duration 1.5P r i nc i pa I Axes:



16 14 08 38.93 17.778S 178.864W 565km 6.0mb ( 70 obs.) FIJI ISLANDS REGION FAULT PLANE SOLUTION: P-Wav«s NP1:Strike- 10 Dip-90 Slip- -65 NP2: 100 25 -180

Pr i nc i pa I Axes:T Pig-40 Azm- 77 P 40 303

Comment: The focal mechanism is poorly controlled and corresponds to normal faulting with a moderate strike-slip component. The preferred fault plane is not determined.

RADIATED ENERGYNo. of sto: 22 Facal mech. M Energy 8.7±1.5*10**13 Nm

MOMENT TENSOR SOLUTION Dep 566 No. of sta: 28 Pr i nc i pa I Axes:



CENTROID, MOMENT TENSOR (HRV) Dato Used: GDSNL.P.B.: 44S, **C M.W.: 35S, 75C Centroid Locotion: Origin Time 14:08:46.7 0.1 Lat 17.54S 0.01 Lon 178.76W 8.01

APR 1993 PAGE 24

Dep 591.7 6.5 Half-duration 6.8 Pr i nc!pal Axes:

Scale 16»»19 NmT Val- 2.54 Pig-29 Azm-132N 0.16 43 16P -2.76 33 243

Best Double CaupIe:Ma-2.6*10**19NP1:Strike-276 Dip-44 Slip- -3NP2: 8 88 -134

17 14 38 41.62 18.816S 174.246W 63km5.3mb ( 55 obs.)TONGA ISLANDSCENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 22S. 36CCentraid Location:Origin Time 14:38:47.4 6.6Lat 18.59S 0.09 Lan 174.16* 6.68Dep 42.2 7.9 Half-duration 1.1Principal Ax«s:


Best Double CaupIe:Mo-1.1 * 10**17 NP1:Strike- 86 Dip-10 Slip- 169 NP2: 187 88 81

17 20 32 44.51 16.595S 177.397W 18km 5.8mb ( 52 abs.) 6.6Msz ( 51 abs.) FIJI ISLANDS REGION FAULT PLANE SOLUTION: P-Waves NP1:Strike-325 Dip-88 Slip 173 NP2: 235 83 -2

Pr i nc i pa I Axes:T Pig- 4 Azm-100 P 6 190

.Comment: The facal mechanism is poorly controlled and corresponds to strike sIip faulting with a small normal component. The preferred fault plane is not determined.

RADIATED ENERGYNo. of sta: 7 Facal mech. F Energy 2.4±0.7*16*«14 Nm

MOMENT TENSOR SOLUTION Dep 13 Na. of sta: 18 Pr i nc i pa I Axes:

Scale 16**18 NmT Vol- 2.69 Pig-11 Azm-271N 0.17 77 124P -2.86 7 3

Best Double CaupIe:Mo-2.8*10** 18NP1:Strike- 47 Dip-77 Slip- 3NP2: 317 87 167

CENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 46S. **C M.W.: 29S, 61C Centraid Location: Origin Tim* 26:32:52.4 6.1 Lat 16.46S 6.61 Lan 177.31W 6.61 Dep 15.6 FIX Ha If-durotian 3.4 Principal Axes:

Scale 16»*18 NmT Vol- 2.93 Pig- 5 Azm-273N -0.18 84 76P -2.75 2 183

Best Double Cauple:Ma-2.8*10««18NP1:Strike-318 Dip-85 Slip- 178NP2: 48 88 5

18 04 55 46.66 11.997N 95.626E 24km5.1mb ( 69 abs.) 4.6Msz ( 3 abs.)ANDAMAN ISLANDS, INDIACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 8S, 13CCent rai d Locat i an:Origin Time 64:55:44.8 6.5Lot 12.66N 6.21 Lon 95.52E 6.14Dep 17.3 7.2 Half-duration 1.6Pr i nc i pa I Axes:

Scale 16**16 NmT Val- 5.90 Pig- 9 Azm-138 N 2.05 36 235 P -7.95 52 37

Best Double Cauple:Mo-6.9*10««16 NP1:Strike-194 Dip-48 Slip 143 NP2: 77 63 -48

18 09 16 23.22 11.652S 76.536W 166km

6.6mb (126 abs.)CENTRAL PERUFAULT PLANE SOLUTION: P-Waves NP1:Strike- 35 Dip-76 Slip- -33 NP2: 138 59 -157

Pr i nc i pa I Axes:T Pig- 7 Azm- 88 P 37 353

Comment: The facal mechanism is poorly controlled and corresponds ta strike-slip faulting with a large narmol component. The preferred fault plane is not determined.

RADIATED ENERGYNa. of sta: 16 Facal mech. F Energy 4.8±1.6*16**12 Nm

MOMENT TENSOR SOLUTIONDep 167 Na. of sta: 18Pr i nc i pa I Axes:

Scole 16»*18 Nm T Val- 2.50 Pig-11 Azm-167 N 6.43 31 264 P -2.93 57 366

Best Double CaupIe:Mo-2.7*16**18 NP1:Strike-165 Dip-43 Slip 138 NP2: 42 63 -55

CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 44S. ««C M.W.: 35S, 62CCent ra i d Laca t i an:Origin Time 69:16:29.7 6.1Lat 11.67S 0.61 Lan 76.58W 0.01Dep 113.4 0.7 Half-duration 3.4Pr i nc i pa I Axes:


Best Double Coup Ie:Mo-2.8*10**18 NP1:Strike- 40 Dip-60 Slip- -26 NP2: 144 67 -147

18 14 10 38.42 53.958S 133.868W 10km 5.6mb ( 31 obs.) 6.1Msz ( 38 abs.) PACIFIC-ANTARCTIC RIDGE CENTROID. MOMENT TENSOR (HRV) Data Used: GDSNL.P.B.: 42S. «*C M.W.: 38S. 77C Cent ro i d Loca t i on: Origin Time 14:10:48.06.1 Lot 54.01S 0.61 Lan 133.88W 0.01 Dep 15.6 FIX Ha If-duratian 3.0 Pr i nc i pa I Axes:


Best Double CaupIe:Mo-2.8*18*«18 NP1:Strike-168 Dip-61 Slip- -1 NP2: 198 89 -151

19 21 61 48.94 4.615N 128.264E 24km 6.1mb ( 95 obs.) 6.7Msz ( 50 abs.) NORTH OF HALMAHERA. INDONESIA FAULT PLANE SOLUTION: P-Waves NP1:Strike-190 Dip-73 Slip- 126 NP2: 302 39 27

Pr i nc i pa I Axes:T Pig-49 Azm-139 P 26 254

Comment: The facal mechanism is paorly central led and corresponds to reverse faulting with o large strike- slip component. The preferred fault plane is not determined.

RADIATED ENERGYNa. of sta: 9 Facol mech. F Energy 5.2±6.8*16** 14 Nm

MOMENT TENSOR SOLUTION Dep 18 Na. af sto: 15 Pr i nc i pa I Axes:


Best Double CaupIe:Mo-1.5*16** 19 NP1:Strike-291 Dip-36 Slip- 17 NP2: 187 86 125

CENTROID, MOMENT TENSOR (HRV) Dota Used: GDSN L.P.B.: 45S. *»C M.W.: 39S, 79C

Centroid Lacatian: Origin Time 21:61:57.5 6.1 Lat 4.69N 6.01 Lan 128.37E 6.61 Dep 41.1 6.6 Half-duratian 5.6 Pr i nc i pa I Axes:


Best Double Coup Ie:Ma 1.6*16»»19 NP1:StrIke-368 Dip-46 Slip- 29NP2: 195 72 126

26 68 11 21.64 54.366S 144.686E 16km 5.3mb ( 23 obs.) 5.7Msz ( 15 obs.) WEST OF MACOUARIE ISLAND CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B. : 41S. 97C Centroid Location: Origin Time 68:11:26.6 0.2 Lat 54.77S 6.62 Lan 143.82E 6.63 Dep 15.0 FIX Half-duratian 2.0 Pr i nc i pa I Axes:

Scale 10**17 Nm T Val- 6.66 Pig- 3 Azm- 41 N 6.08 69 146 P -6.74 20 316

Best Double CaupIe:Mo 6.7*16** 17 NP1:Strike- 87 Dip-73 Slip 168 NP2: 354 78 -17

26 16 26 19.50 20.883S 178.699W 592km5.6mb ( 80 abs.)FIJI ISLANDS REGIONCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 38S, 71CCent raid Locat i on:Origin Time 16:26:24.3 0.2Lat 20.70S 8.02 Lon 178.56W 6.82Dep 599.9 1.3 Half-duration 2.0Pr i nc i pa I Axes:

Scale 10»«17 Nm T Val- 5.72 Pig-18 Azm-209 N 6.32 28 110 P -6.64 56 328

Best Double CaupIe:Ma-5.9*10** 17 NP1:Strike-335 Dip-37 Slip- -38 NP2: 98 68 -120

21 12 58 31.58 0.612S 123.686E 149km5.1mb ( 60 obs.)MINAHASSA PENINSULA, SULAWESICENTROID, MOMENT TENSOR (HRV)Dato Used: GDSNL.P.B.: 15S, 16CCentraid Lacatian:Origin Time 12:58:33.6 6.7Lat 6.67N 6.69 Lon 123.84E 6.67Dep 136.0 2.9 Half-duration 1.6Principal Axes:

Scole 10**16 Nm T Val- 6.68 Pig-80 Azm-166 N 1.49 9 6 P -7.57 2 270

Best Double CaupIe:Ma 6.8*16** 16 NP1:Strike-350 Dip-43 Slip- 76 NP2: 188 48 163

22 60 59 38.85 8.922S 168.268W 16km 4.9mb ( 18 abs.) 4.8Msz ( 24 abs.) CENTRAL EAST PACIFIC RISE CENTROID, MOMENT TENSOR (HRV) Dato Used: GDSN L.P.B.: 11S. 15C Centroid Location: Origin Time 66:59:54.3 1 .6 Lat 8.53S 6.14 Lan 167.72W 6.13 Dep 15.6 FIX Ha If-durotian 1.8 Pr i nc i pa I Axes:


Best Double CaupIe:Ma-1.3*10** 1 7 NP1:Strike- 31 Dip-63 Slip- -11 NP2: 126 86 -153

22 61 65 37.96 4.695S 102.313E 76km 5.7mb ( 81 obs.) SOUTHERN SUMATERA, INDONESIA CENTROID, MOMENT TENSOR (HRV)

PAGE 25 APR 1993

Data Used: GDSNL.P.B.: 26S. 49CCentroid Location:Origin Time 61:05:41.2 6.4Lot 4.43S 0.03 .Lon 102.17E 0.05D«p 57.6 3.1 Half-duration 1.2Principal Axes:

Scale ie**17 Mm T Vol- 1.26 Pig-76 Azm- 39 N 6.16 6 291 P -1.42 19 199


22 12 45 55.69 56.885N 154.638W 35km5.4mb (121 obs.) 4.4Msz ( 34 obs.)KODIAK ISLAND REGIONCENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 22S, 37CCentroid Location:Origin Time 12:45:57.7 0.4Lot 56.86N 6.69 Lon 153.81W 6.10Dep 27.4 5.1 Half-duration 1.6Pr i nc i pa I Axes:


Best Double Couple:Mo-3.9*10**16 NP1:Strike- 61 Oip-33 Slip- -67 NP2: 214 60 -105

22 22 15 19.04 53.350S 159.394E 10km 5.5mb ( 34 obs.) 5.2Msz ( 28 obs.) MACOUARIE ISLANDS REGION CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 34S. 61C Centroid Location: Origin Time 22:15:23.5 0.3 Lot 53.12S 0.03 Lon 159.17E 0.05 Dep 15.0 FIX Half-duration 1.4 Principal Axes:

Scole 10**17 Nm T Vol- 1.77 Pig- 0 Azm-165 N -0.23 90 180 P -1.53 0 75

Best Double Couple:Mo-1.6*10** 17 NP1:Strike-210 Dip-90 Slip 180 NP2: 300 90 0

24 09 54 21.05 17.871S 179.849E 599km5.5mb ( 95 obs.)FIJI ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 42S. **CCentroid Location:Origin Time 09:54:28.5 0.2Lot 17.51S 0.02 Lon 179.97E 0.01Dep 610.4 0.9 Half-duration 3.2Pr i nc i pal Axes:

Scole 10»*18 Nm T Vol- 2.62 Pig-26 Azm- 38 N 0.21 24 141 P -2.83 53 268

Best Double Couple:Mo-2.7*10** IB NP1:Strike- 86 Dip-29 Slip 148 NP2: 327 75 -65

25 00 07 08.73 15.679S 172.960W 33km5.4mb ( 62 obs.) 5.7Msz ( 61 obs.)SAMOA ISLANDS REGIONCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 42S, **CCentroid Location:Origin Time 00:07:15.0 0.2Lot 15.42S 0.02 Lon 172.69W 0.02Dep 15.0 BDY Ho If-durotion 2.4Pr i nc i pa I Axes:

Scole 10**17 Nm T Vol- 10.66 Pig-63 Azm-280 N 0.05 6 178 P -10.71 26 85

Best Double Couple:Mo-1.1 *10**18 NP1:Strike-160 Dip-19 Slip- 71 NP2: 0 72 96

25 17 42 48.72 1.897S 145.753E 33km 5.1mb ( 41 obs.) 5.3Msz ( 23 obs.)

ADMIRALTY ISLANDS REGION, P.N.G.CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 35S. 58CCentroid Location:Origin Time 17:42:53.5 0.3Lat 1.61S 0.05 Lon 145.78E 0.03Dep 15.0 FIX Half-duration 1.5Principal Axes:


Best Double Couple:Mo 2.1*10**17 NP1:Strike-260 Dip-85 Slip- -4 NP2: 350 86 -175

26 01 17 49.95 6.149S 149.867E 64km5.2mb ( 43 obs.)NEW BRITAIN REGION, P.N.G.CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 40S, 71CCentroid Location:Origin Time 01:17:53.8 0.4Lat 6.20S 0.04 Lon 150.14E 0.05Dep 18.9 2.4 Half-duration 1.3Principal Axes:


Best Double Coup I«:Mo-1.6*16»»17 NP1:Strike-259 Dip-19 Slip- 86 NP2: 83 71 91

27 06 08 56.33 6.138S 147.761E 38km 5.3mb ( 48 obs.) S.IMsz ( 40 obs.) EASTERN NEW GUINEA REG., P.N.G. CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B. : 38S, 76C Cen t ro i d Locot i on: Origin Time 06:09: 4.9 0.3 Lat 6.25S 0.02 Lon 148.08E 0.03 Dep 36.2 2.3 Half-duration 1.3 Principal Axes:

Scole 10**17 Nm T Val- 1.77 Pig-77 Azm- 22 N 0.47 3 278 P -2.24 13 187


27 17 36 21.53 5.260S 68.581E 10km 5.4mb ( 84 obs.) 4.7Msz ( 13 obs.) CHAGOS ARCHIPELAGO REGION CENTROID, MOMENT TENSOR (HRV) Dota Used: GDSN L.P.B.: 16S, 23C Centroid Location: Origin Time 17:36:24.9 0.6 Lat 5.43S 0.10 Lon 68.40E 0.08 Dep 15.0 FIX Hoif-durotion 1.2 Pr i nc i pa I Axes:


Best Double Couple:Mo-5.1*10**16 NPl:Strike-182 Dip-28 Slip- -76 NP2: 346 63 -97

28 02 32 13.72 45.286N 149.993E 99km5.2mb ( 99 obs.)KURIL ISLANDSCENTROID, MOMENT TENSOR (HRV)Dato Used: GDSNL.P.B.: 29S, 46CCentroid Location:Origin Time 02:32:15.5 0.4Lat 45.21N 0.05 Lon 150.07E 0.05Dep 98.5 3.3 Half-duration 1.1Principal Axes:

Scole 10**16 Nm T Val- 11.63 Pig-45 Azm-323 N -3.34 37 101 P -8.30 22 209


28 62 46 63.25 58.936S 26.316W 33km 5.6mb ( 23 obs.) 4.3Msz ( 1 obs.) SOUTH SANDWICH ISLANDS REGION CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 13S, 21C Centroid Location: Origin Time 02:46:16.4 0.6 Lat 59.13S 0.07 Lon 26.11W 6.12 Dep 112.6 4.5 Half-duration 1.1 Principal Axes:


Best Double Coup I«:Mo-1.6»16»»17 NP1:Strike-248 Dip-26 Slip- 26 NP2: 134 79 114

28 05 16 15.42 47.384N 153.578E 33km 5.3mb (103 obs.) 4.4Msz ( 25 obs.) KURIL ISLANDSCENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 10S, 11C Centroid Location: Origin Time 05:16:16.5 0.9 Lat 47.37N FIXjLon 153.61E FIX Dep 48.917.2 Half-duration 1.0 Pr i nc i pol Axes:



29 68 21 00.81 35.611N 112.112W 10km5.5mb ( 87 obs.) 5.0Msz ( 16 obs.)WESTERN ARIZONACENTROID, MOMENT TENSOR (HRV)Dota Used: GDSNL.P.B.: 29S, 50CCentroid Location:Origin Time 08:21:10.0 0.3Lat 35.99N 0.04 Lon 111.93W 0.06Dep 15.0 BDY Ho If-duration 1.2Principal Axes:

Scole 10**17 Nm T Val- 0.90 Pig- 3 Azm- 11 N 0.26 7 280 P -1.16 83 126


30 08 49 09.16 7.647N 37.128W 10km 5.0mb ( 53 obs.) 4.7Msz ( 24 obs.) CENTRAL MID-ATLANTIC RIDGE CENTROID, MOMENT TENSOR (HRV) Dota Used: GDSN L.P.B.: 21S, 39C Centroid Location: Origin Time 08:49:15.3 0.5 Lot 7.84N 0.07 Lon 37.20W 0.05 Dep 15.0 FIX Half-durotion 1.1 Pr i nc i pa I Axes:

Scole 10**17 Nm T Val- 1.32 Pig- 8 Azm-226 N -0.12 81 63 P -1.20 3 317

Best Double Couple:Mo-1.3*10**17 NP1:Strike- 2 Dip-82 Slip- 4 NP2: 271 86 172

30 11 19 00.29 53.831N 160.514E 59km5.2mb ( 91 obs.)NEAR EAST COAST OF KAMCHATKACENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 21S, 27CCentroid Location:Or igin Time 11:19: 6.3 0.7Lot 53.71N 0.09 Lon 160.78E 0.10Dep 55.8 6.3 Half-duration 1.0Pr i nc i pol Axes:


Best Double Couple:Mo-3.2*10**16 NP1:Strike-237 Dip-36 Slip- 92

APR 1993 PAGE 26

NP2: 54 54 88

91.536W 68km30 12 29 36.35 13.991N4.7mb ( 28 obs.)NEAR COAST OF GUATEMALACENTROID, MOMENT TENSOR (HRV)Dato Used: GOSNL.P.B.: 29S. 43CCentroid Location:Origin Time 12:29:37.5 0.4Lot 13.B6N 0.04 Lon 91.72W 0.050«p 56.1 4.7 Half-duration 1.0Principal Axes:

Scale 10**16 NmT Vol- 5.41 Plg-BO Azm-288 N -0.10 9 84 P -5.31 4 174

Best Double Couple:Mo-5.4*10**16 NP1:StrIke-274 Dip-42 Slip- 104 NP2: 76 50 78

30 14 16 34.86 6.042S 130.303E 108km5.1mb ( 45 obs.)BANDA SEA

CENTROIO, MOMENT TENSOR (HRV)Data Used: GOSNL.P.B.: 10S, 12CCentroid Location:Origin Time 14:16:35.0 1.1Lot 6.04S FIX;Lon 130.30E FIXOep 118.7 7.1 Half-duration 1.0Pr i nc i pal Axes:


Best Double Couple:Mo-2.8*10**16NP1:Strike-248 Dip-24 SIip-NP2: 80 67

7895

Compiled by Pingsheng Chang, Will is S. Jacobs, Stuort K. Koyanagi, Christina K. Lovonne, John H. Minsch, Russell E. Needhom, Woverly J. Person, Bruce W. Presgrove and William H. Schmieder.

PAGE 27

02 April 1993 08:04:11.77 Tonga Islands Region

GUMO (LHZ)P x2 V '

SSE (LHZ)P x4 '

LZH (LHZ)Pdiff x9

CTAO (LHZ)P x2 v '

KMI (LHZ)P x?

CHTO (LHZ)

M and B

Time (min)

YSS (LHZ)P x3 V '

SNZO (LHZ) p xi v '

HIA (LHZ)P x7 V '

CMB (LHZ)P x4 V '

PAS (LHZ)P x2 V '

ANMO (LHZ)P x3 v '

XAN (LHZ)P x3 '

(BHZ)

ZOBO (LHZ)Pdiff x7 '

ENH (LHZ)P x5 V 7

SPA (LHZ)P x3 V '

0123

Time (min)

05 April 1993 04:00:05,39 South Sandwich Islands Region

BDF (LHZ) p xu v '

HRV (LHZ)Pdiff x73

GOGA (LHZ)Pdiff x93v '

ZOBO (LHZ)P x!6 V '

ZOBO (BHZ)

CCMPdiff x

PMSA (LHZ) p v

RAR (LHZ)

SNZO (LHZ)P x4

M and B0 1 2

Time (min)

TBT (LHZ)P x23 '

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PAGE 28

16 April 1993 14:08:38.93 Fiji Islands Region

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19 April 1993 21:01:48.94 North of Halmahera, Indonesia

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US. DEPARTMENT OF THE INTERIOR/GEOLOGICAL SURVEYNational Earthquake Information Center

MAY 1993

K DAY EY

010101

a 0101010101

a 01

010101010101010101

ORIGIN T IME UTC

HR

000000010102020202

030303050606060606

MN

225859435001022248

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SEC

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LAT

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24311 16

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DEPTH MAGNITUDES SD GS

LONG

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127

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116

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988,7216109443455.820293,423

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STRAIT OF GIBRALTAR. MD 4.0 (RBA).TURKEY. ML 3.0 (ISK).NEAR SOUTH COAST OF FRANCEPERU-BOLIVIA BORDER REGION. Mw 5.4 (HRV).POLANDKENAI PENINSULA, ALASKA. <AEIC>. ML 2.8 (AEIC).ANDREANOF ISLANDS, ALEUTIAN IS.AEGEAN SEA. ML 2.7 (THE).RYUKYU ISLANDS. Mw 5.5 (HRV). Fe I t (III) at Kadeno.Ok i nowa.SALTA PROVINCE, ARGENTINASAN JUAN PROVINCE, ARGENTINAWINDWARD ISLANDS. MD 2.7 (TRN).NORTHERN COLOMBIASOUTHERN NORWAY. MD 1.4 (BER).SOUTHERN ALASKA. <AEIC>. ML 3.1 (AEIC). 3.2 (PMR).REPUBLIC OF SOUTH AFRICA. ML 3.1 (PRE).NORTH ATLANTIC OCEANSOUTHERN CALIFORNIA. <PAS-P>. ML 3.3 (PAS), 3.0 (GS).Fel t .ARMENIA-AZEPBAIJAN-IRAN BORD REG. Felt in the Astoraarea, Iran.CENTRAL CALIFORNIA. <GM-P>. MD 3.0 (GM). ML 2.9 (GS).SOUTHWESTERN RYUKYU ISLANDSMINAHASSA PENINSULA, SULAWESIKURIL ISLANDSGREECE. ML 1.6 (THE).RAT ISLANDS. ALEUTIAN ISLANDS. ML 5.1 (PMR).TURKEY. ML 2.7 (ISK).OFF EAST COAST OF HONSHU. JAPANETHIOPIATONGA ISLANDSTURKEY. ML 3.0 (ISK).TURKEY. ML 2.5 (ISK).NEAR COAST OF NORTHERN CHILEIRIAN JAYA REGION, INDONESIA. Mw 5.3 (HRV).FIJI ISLANDS REGIONNORTHERN COLOMBIACATAMARCA PROVINCE, ARGENTINAGREECE. ML 1.5 (THE).TANIMBAR ISLANDS REG., INDONESIACENTRAL ITALYGREECE. ML 1.7 (THE).EASTERN GREENLANDGREECE. ML 2.5 (THE).MYANMARLEEWARD ISLANDSSOUTH OF FIJI ISLANDSIRIAN JAYA REGION, INDONESIAEASTERN HONSHU. JAPANWESTERN ARIZONA. ML 2.7 (GS).GUERRERO. MEXICONORTHERN CHILEKYUSHU, JAPANLEEWARD ISLANDSSOUTHERN ALASKA. <AEIC>.CENTRAL ALASKA. <AEIC>.

MD 3.5 (TRN). ML 2.8 (FDF)

NORTHWESTERN BALKAN REGION. ML 2.3 (TTG).

Annual Subscriptions: Superintendent of Documents, U.S Government Printing Office, Washington, D.C 20402. Back issues: Books and Op-sn-File Reports Section, U.S. Geological Survey, Box 25425, Denver, CO 80225.

MAY 1993

01010102

0202020202

0202020202020202020202020202020202

020202

f 02

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03 2704 0604 0904 2604 2605 3905 5106 1406 1506 2006 3207 1707 4107 4408 0208 4609 28

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02 3902 3902 4302 4803 0003 1403 1703 3404 2604 2808 0108 1508 4908 5108 5508 5809 0509 47

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40.39.26.40.36.40.39.

.99 N

.567 N

.910 S

.540 N

.931 S

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.337 N

.356 N

.410 N

.851 N

.527 S

.07 N

.951 N

. 172 N

. 167 S

.39 S. 137 N192 N

.41 S. 41 N.774 S.581 N895 N

. 13 N

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035 N439 N56 N415 S

.423 N102 N922 S746 N476 N40 S971 N151 S

382 S419 N016 N34 S55 S610 N53 N158 N577 N427 N00 S916 N960 N155 N975 N

46 S814 N996 S357 N725 N852 S453 N105 N300 N103 N436 N684 S48 S850 S224 N

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461 E. 1 16 E29 E491 W

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97 W806 W418 E314 W466 E302 W770 E248 E880 W313 E878 W786 W52 E198 W361 E

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DODECANESE ISLANDS. ML 3 2 (ISK). SOUTHERN ALASKA. <AEIC>. ML 3.0 (AElC). CHILE-ARGENTINA BORDER REGION. MD 3.6 (SAN). OFF COAST OF NORTHERN CALIFORNIA. <BRK>. ML 3.9 (BRK). 3.2 (GS).SOUTH OF SUMBA. INDONESIA SOUTHERN MID-ATLANTIC RIDGEAUSTRIA. ML 2.7 (LOG), 2.5 (GRF). Mine collapse. AUSTRIA ML 2.7 (LDG). Mine collapse.AUSTRIA. ML 3.6 (VIE). 3.3 (LDG). MD 3.4 (TRI). Mine coll apse.TURKEY. ML 3.2 (ISK). SOUTH OF JAWA, INDONESIA PUERTO RICO REGION TURKMEN ISTAN-I RAN BORDER REGION TURKEY. ML 3.5 (ISK). MENDOZA PROVINCE. ARGENTINA MENDOZA PROVINCE. ARGENTINA RAT ISLANDS. ALEUTIAN ISLANDS CRETE. MD 4.3 (HLW). 4.1 (ATH). SULAWESI. INDONESIA GUATEMALACHILE-ARGENTINA BORDER REGION. MD 4.0 (SAN). KURIL ISLANDS MARIANA ISLANDS TURKEY. ML 2.8 ( ISK). CENTRAL ITALYCENTRAL CALIFORNIA. <BRK>. ML 3.2 (BRK). 3.3 (PAS), 3.4 (GS).AFGHANISTAN-TAJIKISTAN BORD REG. ETHIOPIA KURIL ISLANDSSOUTH SANDWICH ISLANDS REGION. Mw 6.4 (GS). 6.4 (HRV). Depth from broadband displacement seismograms. EAST OF KURIL ISLANDSSOUTHERN CALIFORNIA. <PAS-P>. ML 2.8 (PAS). SOLOMON ISLANDS. Felt (III) at Honiara. LEEWARD ISLANDS OAXACA, MEXICOCHILE-ARGENTINA BORDER REGION MD 3.7 (SAN).

Mw 5.5 (HRV).Depth from broadband

2.3 (GM). ML 2.2 (BRK). R i chmond and Hilltop Mall.

<GM-P>. MD 3.2 (GM). ML 3.2 (BRK)

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CENTRAL MID-ATLANTIC RIDGE.TONGA ISLANDS. Mw 5.7 (HRV)displacement seismogroms.CENTRAL CHILEGREECE. ML 3.7 (ATH). 3.5 (THE).SOUTHERN IRANSAN JUAN PROVINCE, ARGENTINAOFF COAST OF CENTRAL CHILE. MD 3.8 (SAN)TALAUD ISLANDS. INDONESIANORTHERN IRANNORWEGIAN SEA. MD 2.8 (BER).ETHIOPIANEAR COAST OF NICARAGUA. MD 4.4 (APY).CHILE-ARGENTINA BORDER REGIONNORTH SEA. MD 2.7 (BER).EASTERN HONSHU, JAPANSOUTHERN ALASKA. <AElC>.CENTRAL CALIFORNIA. <GM-P> . MDFe I t at El Sobran te ,FIJI ISLANDS REGIONNORTHERN CALIFORNIA.NEAR NORTH COAST OF I R I AN JAYANORTHERN COLOMBIACENTRAL ITALYSOUTH SANDWICH ISLANDS REGION.ETHIOPIATURKEY. ML 3.2 ( I SK ) .NEAR COAST OF NICARAGUA. MD 4 . 1 (APY).TURKEY. ML 3. 1 ( ISK) .OFF COAST OF OREGONSAN JUAN PROVINCE, ARGENTINABISMARCK SEASOUTH SANDWICH ISLANDS REGIONNORTHWESTERN BALKAN REGION. ML 3.2 (TTG), 3.0 (THE),2.8 (TIR). 2.7 (SKO). Felt (III) at Skopje. Yugoslavia.CENTRAL ALASKA. <AElC>. ML 2.7 (AEIC), 3.2 (PMR).SOUTHERN GREECE. ML 4.6 (THE), 3.6 (ATH).NORTH ISLAND. NEW ZEALANDSOLOMON ISLANDSOFF COAST OF OREGONSOUTHERN ALASKA. <AEIC>.SOUTH SANDWICH ISLANDS REGIONGREECE. ML 2.2 (THE) .PUERTO RICO REGIONCENTRAL PERUMINAHASSA PENINSULA, SULAWESITURKEY. ML 3.0 ( ISK) .TURKEY . ML 2.8 ( I SK ) .REPUBLIC OF SOUTH AFRICA. ML 2.5 (PRE).GREECE. ML 1 . 9 (THE) .OFF E. COAST OF N. ISLAND, N Z.GREECE. ML 1 .9 (THE) .TURKEY . ML 2.8 ( I SK ) .

PAGE MAY 1993

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TURKEY. ML 3.0 (ISK).SOUTHERN ALASKA <AEIC>WESTERN BRAZIL. Mw 6.1 (GS). 6.1 (HRV). mb 5.8 (BRK).Felt at Rio Bronco. Depth from broadband displacementseI smog rams.REPUBLIC OF SOUTH AFRICA. ML 2.7 (PRE).TURKEY. ML 3.0 (ISK).MINDANAO, PHILIPPINE ISLANDSCHILE-ARGENTINA BORDER REGIONTURKEY. ML 2.8 (ISK).MINDANAO, PHILIPPINE ISLANDSSWEDEN. MD 2.9 (BER).NORTHWESTERN BALKAN REGION. ML 2.4 (TTG).SOUTHERN CALIFORNIA. <PAS-P>. ML 2.8 (PAS).REPUBLIC OF SOUTH AFRICA. ML 2.5 (PRE).TURKEY. ML 2.B (ISK).KURIL ISLANDSSOUTHERN NORWAY. MD 1.6 (BER).NEAR COAST OF NORTHERN CALIF. <BRK>. ML 3.6 (BRK).NEAR S. COAST OF HONSHU, JAPANREPUBLIC OF SOUTH AFRICA. ML 3.9 (PRE).NORTHWESTERN BALKAN REGION. ML 3.2 (TTG). 3.0 (VIE). MD3.3 (TRI ) .TURKEY. ML 2.7 (ISK).GREECE. ML 2.0 (SKO).NEAR S. COAST OF HONSHU, JAPANKERMADEC ISLANDS, NEW ZEALANDNEAR WEST COAST OF HONSHU. JAPANKODlAK ISLAND REGION. <AEIC>. ML 3.6 (AEIC).ETHIOPIA. Mw 5.3 (HRV). MD 5.1 (ARO).ADRIATIC SEA. ML 2.5 (TTG).REPUBLIC OF SOUTH AFRICA. ML 3.0 (PRE).NORTHWESTERN BALKAN REGION. ML 2 2 (TTG).GERMANY. ML 2.4 (LDG).ROMAN!ANORTH OF HALMAHERA, INDONESIANORTHERN ITALY. ML 1.7 (GEN).SOUTHERN ALASKA. <AEIC>. Felt (IV) at Kodiak; (III) atTyonek. Kenai and Ninilchik; (II) at Anchorage andChugiak. Felt in the Hamer area and throughout much ofthe Caok Inlet region.BANOA SEASAN JUAN PROVINCE, ARGENTINALUZON, PHILIPPINE ISLANDSNORTHERN CHILENORTHWESTERN BALKAN REGION. ML 2.1 (SKO).SAN JUAN PROVINCE. ARGENTINATURKEY. ML 2.7 (ISK )WESTERN ARABIAN PENINSULAREPUBLIC OF SOUTH AFRICA. ML 2.5 (PRE).CENTRAL PERUNORTHERN ITALY. ML 2.8 (LDG). 2.4 (GEN).MICHOACAN. MEXICONORTHERN ITALY. ML 1.5 (GEN).GREECEJAMAICA REGION. MD 2.4 (HOJ).NORTHERN ITALY. ML 1.6 (GEN).KODlAK ISLAND REGION. <AElC>. ML 3.2 (AEIC).NORTHERN COLOMBIACHILE-ARGENTINA BORDER REGION. MD 3.4 (SAN).NORTHERN ITALY. ML 1.6 (GEN).ROMANIASOUTH OF FIJI ISLANDSNEAR COAST OF CENTRAL CHILE. MD 4.2 (SAN).BULGARIAAFGHANISTAN-TAJIKISTAN BORD REG.ROMAN I ATURKEY. ML 3.8 (ISK).UNITED KINGDOM. ML 2.3 (BGS).CENTRAL CHILENAMIBIA. ML 3.7 (PRE).NORTHERN ITALY. ML 2.2 (LDG)REPUBLIC OF SOUTH AFRICA.PYRENEES. ML 1 0 (STR).ASCENSION ISLAND REGIONTONGA ISLANDS REGIONWESTERN ARIZONA. ML 3.8 (GS).REPUBLIC OF SOUTH AFRICA. ML 2.3 (PRE)NEW BRITAIN REGION, P.N.G.VANUATU ISLANDSCOSTA RICA. MD 3.9 (UPA)FRANCE. ML 3 2 (LDG).PUERTO RICO REGIONSOUTH OF FIJI ISLANDSNORTHERN MID-ATLANTIC RIDGEMINAHASSA PENINSULA, SULAWESISUMBAWA REGION. INDONESIASAN JUAN PROVINCE, ARGENTINACENTRAL CHILE. MD 3.9 (SAN).SWITZERLAND. ML 1.6 (LDG).FIJI ISLANDS REGIONGREECENORTHWESTERN BALKAN REGION. ML 1.8 (TTG).

2.1 (GEN) ML 2.9 (PRE).

Felt at Tres Rios and Cachi

MAY 1993 PAGE

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NORTH ISLAND, NEW ZEALAND NORTHERN ITALY. ML 1 8 (GEN) NORTHERN ITALY ML 1.7 (GEN) NORTHERN ITALY ML 2.1 (GEN) MINDANAO, PHILIPPINE ISLANDS CENTRAL ITALYSAN JUAN PROVINCE. ARGENTINA NEAR COAST OF MICHOACAN, MEXICO NORTHERN ITALY. ML 2.1 (GEN). 1.7 SOUTH OF HONSHU, JAPAN SOUTHERN CALIFORNIA. <PAS-P> Fel t . WEST CHILE RlSEGERMANY. ML 2.8 (STR).NORTHERN ITALY. ML 2.0 (LOG)NEW BRITAIN REGION, P.N.G.ALASKA PENINSULA. <AEIC>.EASTERN KASHMIRREPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).NORTHERN ITALY. ML 1.6 (GEN).OFF E. COAST OF N. ISLAND, N.Z.EASTERN XIZANG-INDIA BORDER REG.REPUBLIC OF SOUTH AFRICA. ML 2.4 (PRE).ROMAN I ANEAR COAST OF NORTHERN CHILEKAMCHATKACRETE. ML 3.7 (CSS). 3.5 (ISK).TURKEY. ML 3.0 ( ISK) .POLAND. ML 3.2 (WAR).CENTRAL CALIFORNIA. <PAS-P>. ML 3.0 (PAS).TURKEY. ML 2.8 (ISK).NEAR COAST OF MICHOACAN. MEXICOSOUTHERN CALIFORNIA. <PAS-P>. ML 3.6 (PAS). 3.3 (GS).Felt ot Borstow. SOUTHERN BOLIVIATURKEY. ML 2.7 (ISK) . TURKEY. ML 2.8 (ISK) .GREECENORTHWESTERN UZBEKISTANAUSTRIA. ML 2.8 (LOG), 2.7 (FUR), 2 6 (VIE).CENTRAL CALIFORNIA. <BRK>. ML 3.0 (BRK), 2 6 (GS)ot Concord ond Woinut Creek.REPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).MONA PASSAGESICILYNEAR COAST OF NORTHERN CHILE. Felt (IV) ot Iquique,Arico ond Putre; (II) ot Porinocoto. Landslidesoccurred ot Arico Hills ond along the A-5 sou t hhighway. Also felt (IV) ot Tocno, Peru.RED SEAPERU-ECUADOR BORDER REGIONTURKEY. ML 2.8 (ISK).SOUTH OF FIJI ISLANDSSOUTH OF JAWA, INDONESIASOUTH OF MARIANA ISLANDSSAN JUAN PROVINCE. ARGENTINA. MD 4.0 (SAN).REPUBLIC OF SOUTH AFRICA. ML 2.0 (PRE).POLANDWINDWARD ISLANDS. MD 3.9 (TRN).NEAR COAST OF CENTRAL CHILE. MD 3.5 (SAN).NORTHERN ALASKA

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NORTHERN ITALYBANDA SEANORTHERN ITALY. ML 2.6 (LOG)SAN JUAN PROVINCE, ARGENTINAOAXACA, MEXICOCENTRAL ALASKA. <AEIC>TURKEY. ML 3.2 ( ISK) .TURKEY. ML 3.1 (ISK).TURKEY. ML 3.0 (ISK ) .ETHI OP I ANORTHERN COLOMBIATURKEY. ML 3.2 (ISK) .TURKEY. ML 3.4 (ISK) .SOUTHERN ITALY. MD 4.4 (TTG).REPUBLIC OF SOUTH AFRICA. ML 2.4 (PRE).CENTRAL ALASKA <AEIC> ML 2 9 (AEIC), 3.2 (PMR).CENTRAL ALASKA. <AE I C>. ML 2 5 (AElC).CENTRAL MEXICOSTRAIT OF GIBRALTAR mbLg 3.1 (MOD).CENTRAL BOLIVIASAN JUAN PROVINCE, ARGENTINATURKEr. ML 2 6 (ISK) .DODECANESE ISLANDS. MD 3.8 (ATH).CENTRAL CALIFORNIA. <PAS-P>. ML 2.8 (PAS), 2.6 (GS).MINDANAO, PHILIPPINE ISLANDS. Mw 5.2 (HRV).TURKEY . ML 2.8 (ISK) .TURKEY. ML 2.8 (ISK).TURKEY. ML 2.8 (ISK)GREECESOUTHERN NORWAY. MD 1.5 (BER).NEAR COAST OF GUATEMALA. Felt (II) ot Son Salvador, ElSo Ivodor.

PAGE MAY 1993

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NORTHWESTERN BALKAN REGION ML 2.5 (VIE).CENTRAL ITALYFIJI ISLANDS REGIONGREECE-BULGARIA BORDER REGIONNORTHERN ITALY. ML 2.1 (GEN).MINDANAO, PHILIPPINE ISLANDSSAN JUAN PROVINCE, ARGENTINASOUTHERN ALASKA. <AElC>. ML 2.7 (AEIC).CENTRAL ALASKA. <AEIC>.CALIFORNIA-NEVADA BORDER REGIONMINAHASSA PENINSULA, SULAWESIAFGHANISTAN-TAJIKISTAN BORD REGSAN JUAN PROVINCE, ARGENTINANORTHERN ITALY. ML 2.0 (GEN).SOUTHERN CALIFORNIA. <PAS-P>MENDOZA PROVINCE, ARGENTINAKURIL ISLANDSGULF OF ALASKA. ML 2.5 (AEIC).SAN JUAN PROVINCE, ARGENTINASAN JUAN PROVINCE, ARGENTINASICILYNORTHERN IRAN. Several houses damaged at Torbat-eHeydar i yeh.CENTRAL ITALYGULF OF ALASKA. ML 4.1 (PGC)REPUBLIC OF SOUTH AFRICA. MLTURKEY. ML 3.1 (ISK).NEW IRELAND REGION, P.N.G.NORTH ISLAND, NEW ZEALANDPOLAND. ML 2.7 (WAR). SOUTHERN ITALY OFF COAST OF OREGON TURKEY. ML 3.5 ( ISK). TURKEY. MD 4.3 (HLW). NORTHERN ITALY. ML 1.9 (GEN). NORTHWESTERN BALKAN REGION CHILE-ARGENTINA BORDER REGION

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HINDU KUSH REGION, AFGHANISTANNORTHERN CHILESOUTHERN PACIFIC OCEAN. Mw 5.4 (HRV).NEAR N COAST OF NEW GUINEA, PNG.SOUTHERN ITALYSOUTHERN ALASKA. <AEIC>. ML 2.5 (AEIC).TURKEY. ML 2.8 (ISK) .SOUTHERN ALASKA. <AEIC>.SOUTHERN EAST PACIFIC RISEROMAN I AOFF W. COAST OF N. ISLAND, NSAN JUAN PROVINCE, ARGENTINAAEGEAN SEASOUTHERN EAST PACIFIC RISENEAR COAST OF NORTHERN CALIF. <GM-P>. MD 3.3 (GM). ML3.6 (BRk).GREECETURKEY. ML 2.8 (ISK).TURKEY. ML 2.8 (ISK).TURKEY. ML 2.8 (ISK).PENNSYLVANIA. mbLg 2.8 (GS). One person in the Readingarea lost his balance because of the earthquake, felloff his bicycle and was injured. Felt (IV) at Readingand (III) at Hamburg and Shillington. Also felt at WestReading, WhitfieId and Wyomissing. This is believed tabe one of the smallest earthquakes in the United Statesfar which confirmed casualty reports have beenrece i ved.SAN JUAN PROVINCE, ARGENTINAAEGEAN SEATURKEY. ML 2.8 (ISK).EASTERN HONSHU, JAPANGREECEMARIANA ISLANDSCENTRAL ALASKA. <AEIC>.AEGEAN SEAGREECEETHIOPI A. MD 5.4 (ARO) .OFF E. COAST OF N. ISLAND, N.Z. ML 3.9 (WEL).SOUTHERN CALIFORNIA. <PAS-P>. ML 2.8 (PAS).GREECETURKEY. ML 2.8 (ISK ) .PYRENEES. ML 1 .0 (STR) .AEGEAN SEASOUTHERN ALASKA. <AEIC>.REPUBLIC OF SOUTH AFRICA. MLCHILE-ARGENTINA BORDER REGION.TONGA ISLANDSREPUBLIC OF SOUTH AFRICA. ML 2.3 (PRE).CENTRAL CALIFORNIA. <GM-P>. MD 2.6 (GM). ML 2.4 (BRK)Felt at Berkeley, Oakland ond Walnut Creek.SOUTHERN ALASKA. <AEIC>.SOUTHERN MID-ATLANTIC RIDGENORTHERN ITALY. ML 1.7 (GEN).AEGEAN SEA ML 2.8 (ISK)NORTHWESTERN BALKAN REGION. ML 2.5 (TTG), 2.5 (TlR).

2.6 (PRE).MD 3.7 (SAN).

MAY 1993 PAGE 8

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NORTHERN ITALY ML 2 6 (GEN).COOK STRAIT, NEW ZEALANDSOUTH ISLAND. NEW ZEALAND. Felt ot Christchurch ondWestpor t .REPUBLIC OF SOUTH AFRICA ML 3.7 (PRE). mbLg 3 8 (BUL).SAN JUAN PROVINCE, ARGENTINAS ICI LYNORTHERN ITALY. ML 1 9 (GEN).LEEWARD ISLANDS. ML 3.3 (FDF). MD 3.5 (TRN).SOUTHERN SUMATERA, INDONESIASOUTHERN IRANREPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).CHILE-BOLIVIA BORDER REGIONNORTHWESTERN BALKAN REGION. ML 2.4 (TTG), 2.3 (TlR).NORTHERN COLOMBIATURKEY . ML 2.8 ( 1 SK ) .NORTHERN ITALY. ML 2.4 (GEN), 2.4 (LOG).REPUBLIC OF SOUTH AFRICA. ML 2.3 (PRE).S ICI LYLEEWARD ISLANDSNORTH ATLANTIC OCEAN. ML 3.8 (LOG). mbLg 3.5 (MOD).FRANCE. ML 2.9 (STR), 2.7 (LOG).CENTRAL ALASKA. <AEIC>.S ICI LYAEGEAN SEASOUTH OF AUSTRALIAAEGEAN SEA. ML 3. 3 ( 1 SK ) .NORTH ISLAND, NEW ZEALANDPENNSYLVANIA. <MACRO>. mbLg 2.0 (GS). Felt in theReod i ng areo .PENNSYLVANIA. <MACRO>. mbLg 2.3 (GS). Felt (V) otReod i ng .PENNSYLVANIA. <MACRO>. mbLg 1.6 (GS). Felt in theReod ing area .PENNSYLVANIA. <MACRO>. mbLg 2.2 (GS). Felt in theReod ing area .NORTH ISLAND, NEW ZEALANDWEST OF GALAPAGOS ISLANDS. Mw 5.6 (HRV).CENTRAL ALASKA. <AEIC>. ML 2.5 (AEIC).NEAR COAST OF VENEZUELA. MD 3.3 (TRN).ETHIOPI ACENTRAL CALIFORNIA. <GM-P>. MD 3.2 (GM).REPUBLIC OF SOUTH AFRICA. ML 4.6 (PRE).SAN JUAN PROVINCE, ARGENTINAS ICI LYNEAR COAST OF CENTRAL CHILE. MD 3.6 (SAN).SOUTHERN ALASKA. <AEIC>.GREECENORTH ISLAND, NEW ZEALANDNORTHERN ITALYSOUTHERN MOLUCCA SEATURKEY . ML 2.8 ( ISK)TURKEY. ML 2.8 (ISK)SOUTHERN ALASKA. <AEIC>.TURKEY. ML 2.8 ( 1 SK) .POLAND. ML 3.4 (WAR), 3.2 (VIE).SICILYJAN MAYEN ISLAND REGIONYUNNAN, CHINAREPUBLIC OF SOUTH AFRICA. ML 2.2 (PRE).NORTHERN ITALY. ML 2.4 (VIE).NEAR COAST OF NORTHERN CHILE. Mw 5.7 (HRV). Ms 4.8(BRK). Felt (IV) at Antofagasta and Taltal; (III) atMejillones; (M) ot Co 1 omo ond Tocopillo.COOK STRAIT, NEW ZEALANDTANIMBAR ISLANDS REG., INDONESIATURKEY. ML 2.7 ( 1 SK ) .REPUBLIC OF SOUTH AFRICA. ML 3.4 (PRE). mbLg 3.2 (BUL).TURKEY. ML 2.5 ( ISK) .MINDANAO, PHILIPPINE ISLANDS. Mw 7.0 (GS), 7.6 (HRV).Ms 6.5 (BRK). Mo-6. 3*10**19 Nm (PPT). Felt (V RF) otBislig and Dovaa; (IV RF) ot Cagoyon de Oro ondKidapawon; (III RF) at Cotabato. Also felt (III RF) atPa 1 a , Leyte and (II RF) on Comiguin Island. Depth frombroadband displacement s«i smog rams.FRANCE. ML 2. 1 (LOG) .LA RIOJA PROVINCE, ARGENTINAPHILIPPINE ISLANDS REGIONNORTH ISLAND, NEW ZEALANDS ICI LY . MD 3.1 (ROM) .SAN JUAN PROVINCE, ARGENTINAKERMADEC ISLANDS, NEW ZEALANDGREECE. MD 3.3 (ATH)ANDREANOF ISLANDS, ALEUTIAN IS.SOUTHERN CALIFORNIA. <PAS-P>. ML 3.B (PAS), 3.6 ( GS ) .Felt (III) at rucco Valley. Also felt ot Barstow, FartIrwin ond Highland.GREECE. MD 3. 3 (ATH) .KERMADEC ISLANDS REGIONNORTHERN ITALY. ML 2 4 (GEN), 2.1 (LOG).GREECE. MD 3.5 (ATH). ML 3.3 (TlR).PHILIPPINE ISLANDS REGIONNORTHERN ITALY. ML 1.4 (GEN).

PAGE MAY 1993

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MAY 1993 PAGE 10

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SOUTHERN ALASKA Mw 5.2 (HRV). ML 4.9 (AEIC). 4.9(PMR). Felt (IV) at Chugiak, Copper Center. Cardova,Eagle River, Gakona, Glennallen, Palmer, SheepMountain, Sutton, Talkeetna, Voldez, Wasilla andWillow. Felt (III) at Anchorage.CENTRAL CALIFORNIA. <PAS-P>. ML 2.9 (PAS).NORTHERN ITALY. ML 2.9 (LOG).OFF COAST OF CENTRAL AMERICANORTH ISLAND. NEW ZEALANDNORTHWESTERN BALKAN REGION. ML 1.9 (SKO).REPUBLIC OF SOUTH AFRICAALASKA PENINSULA. Mw 6.9 (GS), 6.9 (HRV). <SPEC>. Ms6.8 (BRK). Mo-6.5*10»*19 Nm (OBN). 2.9»10**19 Mm (PPT).I terns knocked from shelves at Sand Paint and King Cove.Felt (VI) at Sand Point; (V) at Chignik. ChignikLagaon, False Poss, King Cave, Nelson Lagoon ondPerryville; (IV) at Cold Bay and Port Heiden; (III) atAkhiok and Akuton; (II) at Kodiak. Depth 33.4kilometers from broadband displacement seismagrams.REPUBLIC OF SOUTH AFRICASOUTH OF MARIANA ISLANDS. Felt (III) on Guam.SOUTHERN ITALYTURKEY. ML 2.8 (ISK).NORTH SEA. MD 2.6 (BER).TURKEY. ML 2.8 ( ISK) .TURKEY. ML 2.7 (ISK).LA RIOJA PROVINCE, ARGENTINASOUTHERN NORWAY. MD 2.1 (BER).TURKEY. ML 2.8 (ISK).CALIFORNIA-NEVADA BORDER REGIONSOLOMON ISLANDSUTAH. ML 3.0 (GS).REPUBLIC OF SOUTH AFRICA. ML 2.0 (PRE).TURKEY. ML 3.0 (ISK).TURKEY. ML 3.2 (ISK).NORTHERN ITALY. ML 1.3 (GEN).ETHIOPIA. MD 5.3 (ARO).FIJI ISLANDS REGIONTURKEYCENTRAL ALASKA. <AElC>. ML 3.5 (AEIC), 3.5 (PMR). Feltstrongly at Salcho ond Alyesko Pump Station Number 8.NORTHERN ITALY. ML 1 6 (GEN).MYANMARCENTRAL CALIFORNIA. <GM-P>. MD 3.0 (GM). ML 3.0 (PAS).SAN JUAN PROVINCE, ARGENTINANORTHWESTERN SIBERIA, RUSSIAGREECE. MD 3.6 (ATH). ML 3.5 (TIR).AEGEAN SEAAEGEAN SEAAEGEAN SEANEAR COAST OF NORTHERN CHILENORTHERN MOLUCCA SEACHILE-ARGENTINA BORDER REGION. MD 3.5 (SAN).STRAIT OF GIBRALTAR. mbLg 3.0 (MDD).IONIAN SEA MD 3.1 (ATH).SWITZERLAND. ML 1.9 (LOG).ALASKA PENINSULA. Mw 5.1 (HRV). ML 5.3 (PMR). Felt (IV)ot Sond Point and Perryville; (III) at Chignik. ChignikLagoon, Cold Bay and King Cave.TURKEY. ML 2.9 (ISK).SOUTHERN BOLIVIAEASTERN NEW GUINEA REG., P.N.G.POLAND. ML 3.1 (GRF).SlCILYGULF OF CALIFORNIACATAMARCA PROVINCE, ARGENTINA.(II) at Chanaral and Vallenar,MYANMARMINDANAO. PHILIPPINE ISLANDSBANDA SEASOUTHERN NORWAY. MD 2.1 (BER).SOUTHERN NORWAY. MD 1.5 (BER).SOUTH SANDWICH ISLANDS REGIONBANDA SEAETHIOPIA. MD 3.5 (ARO).SOUTHWESTERN RYUKYU ISLANDSALBANIA. ML 1.8 (TIR).TURKEY. ML 2.8 (ISK).CENTRAL ALASKA. <AEIC>. ML 2.7 (AEIC)COOK STRAIT, NEW ZEALANDGREECENORTHERN MOLUCCA SEA. Mw 5.2 (HRV).LUZON, PHILIPPINE ISLANDS.KENAI PENINSULA, ALASKA. <AEIC>SAN JUAN PROVINCE, ARGENTINASOUTH OF FIJI ISLANDSTURKEY. ML 2.7 (ISK).REPUBLIC OF SOUTH AFRICACRETE. MD 3.5 (ATH).NORTHWESTERN BALKAN REGION. MD 3.1 (TTG). ML 3.0 (TlR).REPUBLIC OF SOUTH AFRICA. ML 3.8 (PRE). mbLg 3.6 (BUL).This event may be a mine explosion which killed severalpeople.

Fe I t (III) at Copi apo; Chile.

Felt in the Manila orea. ML 2.6 (AEIC).

PAGE 11 MAY 1993

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MAY 1993 PAGE 12

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Felt (V) on Adok ond (IV) on Amchitko.broodbond displacement seismogroms.ANOREANOF ISLANDS, ALEUTIAN IS. ML 5.2 (PMR)ANDREANOF ISLANDS, ALEUTIANANDREANOF ISLANDS. ALEUTIANNORTHWESTERN BALKAN REGIONSOUTH OF ALASKATAJIKISTAN-XINJIANG BORDER REG.SOUTHERN SUMATERA, INDONESIASEA OF OKHOTSKFIJI ISLANDS REGIONSICILYSAN JUAN PROVINCE, ARGENTINACHILE-ARGENTINA BORDER REGION.NEAR NORTH COAST OF COLOMBIA.NEAR EAST COAST OF KAMCHATKASOUTHERN ALASKA. <AEIC>. ML 2.5 (AEIC).GREECEOFF COAST OF CHIAPAS, MEXICODODECANESE ISLANDS. ML 3.5 (ISK).ANDREANOF ISLANDS, ALEUTIAN IS. ML 5.1 (PMR). Felt (IV)on Adak.UTAH. ML 3.1 (GS).ANDREANOF ISLANDS, ALEUTIAN IS.CALIFORNIA-NEVADA BORDER REGION.3.3 (GS).NORTHERN ITALY. ML 1.7 (GEN).FRANCENORTH ISLAND, NEW ZEALANDWINDWARD ISLANDS. ML 3.5 (FDF)Mor t i n i que.CALIFORNIA-NEVADA BORDER REGION.CALIFORNIA-NEVADA BORDER REGION.SALTA PROVINCE, ARGENTINANEAR COAST OF CHIAPAS, MEXICOTURKEY. ML 2.8 (ISK).CENTRAL ALASKA. <AEIC>.SAN JUAN PROVINCE, ARGENTINASOUTHERN INDIATURKEY. ML 2.8 (ISK) .NEAR COAST OF CENTRAL CHILE. MD 3.7 (SAN)NEAR COAST OF CHIAPAS, MEXICONEAR COAST OF CHIAPAS,SOUTHERN CALIFORNIA.ROMAN I AROMAN I AREPUBLIC OF SOUTH AFRICA. ML 1.8 (PRE)TURKEY. ML 2.7 (ISK).VOLCANO ISLANDS REGIONNEAR COAST OF CHIAPAS, MEXICOTURKEY. ML 2 8 (ISK).VANUATU ISLANDSSAN JUAN PROVINCE, ARGENTINAVANUATU ISLANDSSOUTH OF TONGA ISLANDSCALIFORNIA-NEVADA BORDER REGION.2.5 (GS) .TAIWAN REGIONPERU-ECUADOR BORDER REGIONOFF E. COAST OF N. ISLAND, N.Z.SOUTHERN TEXAS. <MACRO>. mbLg 3.6 (GS). Felt (IV) otJourdonton and (II) at Three Rivers.OFF COAST OF CHIAPAS, MEXICOSOUTHERN EAST PACIFIC RISE. Mw 5.4 (HRV).NORTHERN MOLUCCA SEA. Mw 5.3 (HRV).NORTHERN ITALY. ML 1.6 (GEN).CHIAPAS, MEXICOSEA OF JAPANCENTRAL CALIFORNIA. <PAS-P>.OFF COAST OF CENTRAL CHILE.TONGA ISLANDS. Mw 6.6 (GS),Mo-9.6*16**18 Nm (PPT). Depth from broadbanddisplacement seismograms.ANDREANOF ISLANDS, ALEUTIAN IS.NEW BRITAIN REGION. P.N.G.SOUTHERN ITALYGREECEAEGEAN SEATURKEY. ML 3.1 (ISK).SOUTHERN ALASKA. <AEIC>.CALIFORNIA-NEVADA BORDER REGION.IRIAN JAYA, INDONESIASAN JUAN PROVINCE, ARGENTINABANDA SEALEYTE. PHILIPPINE ISLANDS. Mw 5.7 (HRV)TONGA ISLANDSNEAR COAST OF GUERRERO, MEXICOKENAI PENINSULA, ALASKA. <AEIC>.SICILYOFF EAST COAST OF HONSHU, JAPANCHILE-ARGENTINA BORDER REGION. MD 3 (SAN JUAN PROVINCE, ARGENTINA. MD 4.3PUERTO RICO REGION

<PAS-P>. ML 2.6 (PAS),

ML 3.3 (PAS). MD 4.1 (SAN). 6.6 (HRV). Ms 6.8 (BRK).

<PAS-P>. ML 2.8 (PAS)

ML 2.5 (AEIC)

i (SAN). (SAN).

PAGE 13 MAY 1993

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23 21 13.1? 31.38 S 68.57 W 102 ?23 25 35.7 37.170 N 117.919 W 5 G 4.7

23 36 09.94 37.145 N 117.780 W 13

23 42 05.14 37.048 N 117.792 W 0

23 51 56.54 37.151 N 117.711 W 0 4.0

23 54 11.24 37.180 N 117.952 W 9

00 00 07.74 37.171 N 117.851 W 9

00 09 42.64 37.132 N 117.752 W 1

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84

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ML 2.8 (PRE)

Mw 6.3 (GS). 6.4 (HRV). Ms

SOUTHERN ITALYALASKA PENINSULA Mw 5.7 (HRV). ML 5.4 (PMR). Ms 5.3(BRK). Felt (IV) at Chignik, Chignik Lagoon, Perryvilleand Sand Paint; (III) at Cold Bay, False Pass, IvanofBay and King Cove; (II) at Port Heiden.GREECE. MD 3.3 (ATH).CENTRAL ALASKA. <AEIC>. Felt (III) at Contwell. LakeMinchumina and Skwentno. Felt (II) at Polmer.KOMANDORSKY ISLANDS REGIONNORTHERN CHILEGREECENEVADA. ML 3.8 (GS), 4.0 (BRK). Felt (II) at Fallan.TURKEY. ML 2.7 (ISK).AFGHANISTAN-TAJIKISTAN BORD REG.TURKEY. ML 2.8 (ISK).NORTHERN ALASKA. <AEIC>. ML 2.9 (AEIC), 3.4 (PMR).SOUTH ISLAND, NEW ZEALANDWESTERN ARIZONA. ML 3.0 (GS).TURKEY. ML 2.7 (ISK).TURKEY. ML 2.8 (ISK).TURKEY. ML 2.7 (ISK).POLAND. MG 2.8 (WAR).NORTH ISLAND, NEW ZEALANDSHIKOKU, JAPANTONGA ISLANDSSOUTHERN ALASKA. <AEIC>.REPUBLIC OF SOUTH AFRICA. ML 2.7 (PRE).KURIL ISLANDSKURIL ISLANDSTURKEY. ML 2.8 (ISK).POLAND. ML 3.2 (GRF). 3.1 (VIE).IRIAN JAYA REGION, INDONESIARYUKYU ISLANDS. Felt an Iriomote-jima.EAST OF SEVERNAYA ZEMLYA, RUSSIASOUTH OF AUSTRALIAREPUBLIC OF SOUTH AFRICA.NEW BRITAIN REGION, P.N.G.NORTHERN ITALYNORTHERN COLOMBIANEW BRITAIN REGION, P.N.G.6.5 (BRK). Ma-3.6»10«*18 Nm (PPT). Felt (I) at Rabaul Two events about 1.6 seconds apart. Depth from broadband displacement seismograms, based an first event.NEW BRITAIN REGION, P.N.G.NEW BRITAIN REGION, P.N.G.NEAR COAST OF CENTRAL CHILE. MD 3.9 (SAN).TONGA ISLANDSNEW BRITAIN REGION, P.N.G.SOUTHERN ALASKA. <AEIC>.SAN JUAN PROVINCE, ARGENTINAJUJUY PROVINCE, ARGENTINAAEGEAN SEAGREECE-ALBANIA BORDER REGIONNEW BRITAIN REGION, P.N.G.TALAUD ISLANDS, INDONESIATONGA ISLANDSKERMADEC ISLANDS REGIONNORTHWESTERN BALKAN REGION.SAN JUAN PROVINCE, ARGENTINALEEWARD ISLANDS. MD 3.2 (TRN)NEAR COAST OF CHIAPAS, MEXICOREPUBLIC OF SOUTH AFRICA. ML 2.7 (PRE).CALIFORNIA-NEVADA BORDER REGION. Mw 6.1 (GS), 6.1(HRV). <GM-P>. MD 6.1 (GM). 6.2 (PAS). ML 6.2 (BRK).Mo-1.0*10»*18 Nm (PPT). Minor damage (V) atIndependence and Lone Pine, California. Felt (V) at BigPine, Bishop, Majave, North Fork and Olancha; (IV) atBenton, Darwin, Inyakern, Lake Isabella, Lemoare,Miramonte, Onyx, Piedra, Reedley, Selma, SequoiaNational Park, Strothmare. Three Rivers and Trona,California. Felt (V) at Beatty. Dyer, Goldfield andTanopah; (IV) at Amargosa Valley, Nevada. Feltthroughout a wide area af California and Nevada fromthe San Froncisco Bay area, Sacramento and Los Angeles,California ta Carson City, Ely and Las Vegas, Nevada. Alarge rockslide occurred about 7 kilometers east ofEureka Valley Sand Dunes. Depth 9.6 kilometers frombroadband displacement seismograms.SAN JUAN PROVINCE, ARGENTINACALIFORNIA-NEVADA 80RDER REGION. ML 4.5 (GS). MD 4.4(PAS), 3.9 (GM). Felt slightly at Beatty, Nevada.CALIFORNIA-NEVADA BORDER REGION. <BRK>. ML 4.9 (BRK).MD 5.1 (PAS).CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 4.0 (GM),4.0 (PAS). ML 4.2 (BRK), 4.0 (GS).CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 4.1 (GM),4.3 (PAS). ML 4.2 (BRK). 4.1 (GS).CALIFORNIA-NEVADA BORDER REGION. <PAS-P>. MD 3.4 (GM),3.4 (PAS).CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.6 (GM),3.6 (PAS). ML 4.1 (BRK), 3.4 (GS).CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.2 (GM) ,

ML 1.5 (TTG).

ML 3.1 (FDF).

MAY 1993 PAGE 14

3.2 (PAS). ML 3.8 (BRK), 3.2 (GS). 18 00 13 55.74 37.118 N 117.808 W 9 3.0 61 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.6 (GM),

3.2 (PAS). ML 3.8 (BRK), 3.5 (GS).18 00 16 54.3* 5.409 S 152.136 E 33 N 5.0 1 2 18 NEW BRITAIN REGION, P N.G. 18 00 18 12. 2le 37.168 N 117.834 W 6 39 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.5 (GM),

3.7 (PAS). ML 4.0 (BRK), 3.3 (GS).18 00 24 43.0& 37.177 N 117.818 W 7 19 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.1 (GM) . 18 00 51 00.4? 31.34 S 68.36 W 62 ? 1.4 5 SAN JUAN PROVINCE, ARGENTINA 18 00 56 08.9 37.041 N 117.695 W 5 G 3.2 0.7 39 CALIFORNIA-NEVADA BORDER REGION. MD 3.8 (GM), 3.3

(PAS). ML 3.9 (BRK), 3.4 (GS). 18 01 03 06.4& 37.152 N 117.762 W 3 4.6 154 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 4.8 (GM),

4.8 (PAS). ML 5.3 (BRK), 4.8 (GS). Felt (V) at LonePine. California. Felt (IV) at Amargasa Valley andBeatty, Nevada. Felt (III) at Big Pine and Bishop,California. Also felt (III) at Dyer and Galdfield,Nevada.

18 01 05 49.7& 63.165 N 150.578 W 126 48 CENTRAL ALASKA. <AEIC>. 18 01 10 36.4& 37.234 N 117.816 W 1 32 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.6 (GM),

3.4 (PAS). ML 3.7 (BRK), 3.2 (GS).18 01 14 02 5% 40.007 S 173.059 E 33 N 0.3 15 COOK STRAIT, NEW ZEALAND. ML 4.0 (WEL). 18 01 22 01.4& 37 193 N 117.723 W 0 42 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.0 (GM),

3.1 (PAS). ML 3.5 (BRK), 2.9 (GS). 18 01 25 34. 2le 37.084 N 117.814 W 5 40 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MO 3.1 (GM),

3.2 (PAS). ML 3.6 (BRK), 3.2 (GS). 18 01 27 04.6& 37.138 N 117.853 W 0 36 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.3 (GM),

3.3 (PAS). ML 3.7 (BRK), 3.1 (GS). 18 01 29 15 0 37.129 N 117.780 W 5 G 0.8 33 CALIFORNIA-NEVADA BORDER REGION. ML 3.3 (GS). Multiple

event.18 01 38 59.6 5.448 S 152.141 E 33 N 5.5 4.9 1.0 140 NEW BRITAIN REGION, P.N.G. 18 01 45 16.7 3.902 S 135.421 E 42 D 5.2 4.9 1.0 47 IRI AN JAVA REGION, INDONESIA 18 01 51 18 1& 37.151 N 117.787 W 0 7 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.0 (GM).

3.0 (PAS). 18 01 57 53.64 37.228 N 117.838 W 0 25 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.1 (GM).

3.1 (PAS).18 02 19 47.5% 39.604 S 174.068 E 140 G 0.5 19 NORTH ISLAND, NEW ZEALAND 18 02 24 19.3& 37.115 N 117.850 W 10 26 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.0 (GM).

ML 2.7 (GS).18 02 27 14.5 37.211 N 117.749 W 5 G 0.5 18 CALIFORNIA-NEVADA BORDER REGION. ML 2.5 (GS). 18 02 32 29.1 37.262 N 117.761 W 5 G 1.0 33 CALIFORNIA-NEVADA BORDER REGION. ML 2.9 (GS). 18 02 38 03.0* 16.038 S 174.652 W 17 D 4.7 1.1 25 TONGA ISLANDS 18 03 06 43.0% 39.741 N 24.177 E 10 G 129 AEGEAN SEA 18 03 07 48.84 37.076 N 117.819 W 4 52 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.5 (GM).

3.1 (PAS). ML 3 2 (GS).18 03 07 59.5? 5.85 S 146.23 E 33 N 4.0 1.1 5 EASTERN NEW GUINEA REG., P.N.G.18 03 16 54.04 37.126 N 117.846 W 7 32 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.8 (GM). 18 03 51 34.44 37.143 N 117.824 W 7 52 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. ML 3.2 (GS). 18 03 52 31.9 37.099 N 117.857 W 5 G 1.0 14 CALIFORNIA-NEVADA BORDER REGION. MD 3.3 (PAS). ML 3.1

(GS) . 18 04 10 28.44 37.198 N 117.824 W 0 56 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.1 (GM),

3.0 (PAS). ML 3.5 (BRK), 3 0 (GS).18 04 17 50.14 37 224 N 117.822 W 7 34 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.0 (GM). 18 04 39 05.7 37.250 N 117.761 W 5 G 0 8 29 CALIFORNIA-NEVADA BORDER REGION. MD 3.0 (GM). ML 2.8

(GS). 18 05 10 47.24 37.167 N 117.799 W 6 3.1 77 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.7 (GM),

3.4 (PAS) ML 3.8 (BRK). 3.5 (GS). o 18 05 13 57.3 5.369 S 152.370 E 33 N 4.9 4.8 1 0 32 NEW BRITAIN REGION, P.N.G. Mw 5.3 (HRV).

18 05 20 37.7% 33.781 S 70.980 W 66 ? 0.1 9 CHILE-ARGENTINA BORDER REGION. MD 3.1 (SAN).18 05 32 37.5% 26.391 S 27.481 E 5 G 0.6 8 REPUBLIC OF SOUTH AFRICA. ML 2.8 (PRE).18 06 06 30.7* 1.628 N 126.344 E 96 * 5.0 1 2 29 NORTHERN MOLUCCA SEA18 06 45 46.0 39.292 N 27.924 E 10 G 0.5 21 TURKEY. ML 3.4 (ISK).18 07 03 25.84 37.061 N 117.725 W 0 20 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.1 (GM).

Dauble event.18 07 17 54.1 51.046 N 178.625 W 20 D 4.2 0.9 44 ANDREANOF ISLANDS, ALEUTIAN IS.

a 18 08 04 18.9 61.031 N 149.953 W 01 D 5.2 1.0 311 SOUTHERN ALASKA. Mw 5.2 (HRV). ML 5.2 (AEIC), 5.2(PMR). Felt (V) at Anchorage, Cooper Landing, EagleRiver, Fart Richardson, Houston, Palmer and Wasilla;(IV) at Chugiak, Hope, Kasilaf, Kenai, Moose Pass,Seward, Saldotna, Sterling, Willow and in the KenaiLake area

18 08 07 38 0% 32.170 S 68.227 W 10 G 0.9 6 MENDOZA PROVINCE. ARGENTINA 18 08 11 51.4 40.441 N 21.842 E 10 G 0.5 6 GREECE 18 08 19 24. etc 37.092 N 117.822 W 6 70 CALIFORNIA-NEVADA BORDER REGION. <PAS-P>. MD 3.8 (GM),

3.8 (PAS). ML 3.7 (BRK), 3.6 (GS).18 08 40 41 2? 40.81 N 23.10 E 10 G 014 GREECE18 09 04 43.04 37.001 N 117.748 W 0 43 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.1 (GM). 18 09 20 45.2? 47.88 N 148.62 E 348 ? 3.8 1.7 10 NORTHWEST OF KURIL ISLANDS 18 09 33 13.3 14 393 N 40.221 E 10 G 4.6 1.0 47 ETHIOPIA. MD 5 0 (ARO). 18 09 45 24.34 40.350 N 76.020 W 5 G 5 PENNSYLVANIA. <MACRO>. mbLg 2.1 (GS). Felt (IV) at West

Lawn. Felt in the Reading area.18 09 58 32 64 38 952 N 123.203 W 6 7 NEAR COAST OF NORTHERN CALIF. <GM-P>. MD 2 9 (GM). 18 10 11 47.34 36.107 N 117.697 W 1 18 CALIFORNIA-NEVADA BORDER REGION. <PAS-P>. ML 2.8 (PAS).

2 8 (GS). 18 10 12 59.4? 12.45 N 89.51 W 33 N 4.2 1 6 10 OFF COAST OF CENTRAL AMERICA. Felt (II) at San

Salvador, El Salvador.18 10 15 07.6% 40.828 N 22.978 E 10 G 035 GREECE

f 18 10 19 33.7 19.914 N 122.450 E 169 G 6.4 1.3 606 PHILIPPINE ISLANDS REGION. Mw 6.8 (GS), 6.7 (HRV). mb6 6 (BRK). Mo-1 . 1 * 10** 19 Nm (PPT). Two events about 2.8seconds apart. Depth from broadband displacementseismograms, based on second event.

18 10 28 44.94 60.052 N 152.880 W 121 48 SOUTHERN ALASKA. <AEIC>. 18 10 28 59.24 37.112 N 117.900 W 7 88 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.7 (GM),

3 6 (PAS). ML 3.8 (BRK), 3.5 (GS) 18 10 56 15 54 37.019 N 117.751 W 0 3.5 68 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.7 (GM),

PAGE 15 MAY 1993

3 4 (PAS). ML 3 8 (BRK), 3 5 (GS). 18 11 04 54.74 37.145 N 117.782 W 0 34 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.2 (GM).

3.0 (PAS). ML 2.9 (GS).18 11 11 58.5% 41.055 N 23.230 E 10 G 0.1 5 GREECE-BULGARIA BORDER REGION 18 11 15 10.4» 6.997 S 154.941 E 33 N 4.9 1.2 33 SOLOMON ISLANDS18 11 27 22.3% 26.444 S 27.393 E 5 G 0.8 5 REPUBLIC OF SOUTH AFRICA. ML 2.1 (PRE). 18 11 35 36.94 60.969 N 149.906 W 39 67 KENA I PENINSULA, ALASKA. <AE I C>. ML 3 2 (AEIC), 3.7

(PMR).18 11 44 25.9 42.761 N 142.025 E 38 4.3 0.9 30 HOKKAIDO, JAPAN REGION 18 11 47 37.6» 50.970 N 158.204 E 33 N 4.4 0.8 16 EAST OF KURIL ISLANDS18 12 06 32.9 32.598 S 71.718 W 10 G 0.7 19 NEAR COAST OF CENTRAL CHILE. MD 4.4 (SAN). 18 12 22 53.5» 32.619 S 71.725 W 10 G 0.8 15 NEAR COAST OF CENTRAL CHILE. MD 4.4 (SAN). 18 12 42 47.7? 40.13 N 21.73 E 10 G 0.3 4 GREECE18 13 05 20.6? 32.30 S 71.87 W 33 N 0.5 9 NEAR COAST OF CENTRAL CHILE. MD 3.6 (SAN). 18 13 21 06.1? 13.11 N 89.39 W 55 D 4.3 1.1 21 EL SALVADOR. Felt (III) at San Salvador. 18 13 40 45.0? 42.80 N 13.01 E 10 G 0.7 4 CENTRAL ITALY 18 13 54 13.7% 40.193 S 173.811 E 140 G 1.0 26 COOK STRAIT, NEW ZEALAND 18 14 03 53.0? 4.19 S 150.86 E 33 N 4.4 1.6 8 NEW BRITAIN REGION, P.N.G. 18 14 39 43.2 37 034 N 117.711 W 5 G 3 3 0.9 37 CALIFORNIA-NEVADA BORDER REGION. MO 3.4 (GM), 3.0

(PAS). ML 4.0 (BRK), 3.3 (GS). 18 14 53 13.34 37.233 N 117.829 W 7 45 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MO 3.3 (GM),

3.1 (PAS). ML 2.8 (GS).18 15 20 42.6» 32.087 S 70.545 W 100 G 1.3 16 CHILE-ARGENTINA BORDER REGION. MD 4.2 (SAN).18 15 32 24.0 9.836 N 126.475 E 40 D 5.0 4.5 1.1 65 MINDANAO, PHILIPPINE ISLANDS18 15 54 34.74 37.185 N 117.760 W 0 41 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.2 (GM),

3.0 (PAS). ML 3.5 (BRK).18 16 14 16.4? 23.99 S 179.37 E 500 G 4.5 1.1 15 SOUTH OF FIJI ISLANDS18 16 46 03.4% 26.318 S 27 619 E 5 G 0.7 5 REPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).18 17 09 05.84 34.290 N 117.481 W 10 22 SOUTHERN CALIFORNIA. <PAS-P>. ML 3.7 (PAS), 3.6 (GS).

Felt (IV) at Phelan; (III) at Cedar Pines Park, Lytle Creek and Rialto; (II) at Highland. Felt as far as Pasadena.

18 17 39 46.7* 3.753 S 135.428 E 33 N 4.8 4.3 0.9 12 IRIAN JAYA REGION, INDONESIA18 18 01 37.1» 6.055 S 130.020 E 211 » 4.3 0.9 9 BANDA SEA18 18 49 56.4» 31.211 N 131.532 E 52 4.2 1.1 19 KYUSHU, JAPAN18 18 51 05.84 59.822 N 152.099 W 67 40 SOUTHERN ALASKA. <AElC>. ML 2.7 (AEIC).18 19 35 12.4 36.328 N 70.724 E 33 N 4.2 1.3 17 HINDU KUSH REGION, AFGHANISTAN18 19 37 03.0? 34.57 N 137.84 E 33 N 4.2 0.3 5 NEAR S. COAST OF HONSHU, JAPAN18 20 05 33.1% 40.274 N 21.656 E 10 G 0.8 8 GREECE18 20 17 33.64 60.170 N 152.411 W 83 3.1 74 SOUTHERN ALASKA. <AEIC>.18 20 26 45.3% 45.479 N 26 228 E 75 ? 0.5 7 ROMANIA18 20 35 20.4? 26.30 S 27.60 E 5 G 1.14 REPUBLIC OF SOUTH AFRICA18 20 55 40.9% 44.987 S 167.555 E 163 ? 0.3 13 SOUTH ISLAND, NEW ZEALAND18 20 57 47.9 37.124 N 117.771 W 5 G 1.0 37 CALIFORNIA-NEVADA BORDER REGION. MD 3.1 (GM), 3.0

(PAS) ML 3.5 (BRK) , 3.0 (GS) .18 21 04 49.2* 15.320 S 70.844 W 181 » 4.3 1.4 17 SOUTHERN PERU18 21 38 21.5% 41 757 N 13.601 E 10 G 1.0 6 SOUTHERN ITALY18 22 25 10.4? 18.51 S 166.78 E 33 N 3.8 1.5 5 VANUATU ISLANDS REGION18 22 31 07.2* 16.550 N 94.533 E 33 N 3.9 0.7 9 NEAR SOUTH COAST OF MYANMAR18 22 54 19.3? 16.02 N 95 72 W 33 N 3.8 1.5 7 OAXACA, MEXICO18 23 10 44.0 40.365 N 25.712 E 10 G 0.9 13 AEGEAN SEA. ML 3 2 (ISK).18 23 12 47.4% 31 352 S 68.785 W 122 ? 0.8 8 SAN JUAN PROVINCE, ARGENTINA18 23 48 53.94 37.064 N 117.777 W 3 5.0 4.7 229 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 5.0 (GM),

5.0 (PAS). ML 5 2 (BRK), 4.8 (GS). Felt (V) at Ridgecrest, California and (IV) at Big Pine, Bishop, Lone Pine and Mojave. California. Felt in Fresno, Inyo, Kern. San Bernordino, Tulare and Tuolumne Counties, Co I i for n i a.

18 23 52 17.7? 31.14 S 69.24 W 128 G 0.3 6 SAN JUAN PROVINCE, ARGENTINA18 23 57 40.8 37 084 N 117.746 W 5 G 4.5 0.7 106 CALIFORNIA-NEVADA BORDER REGION. MD 4.4 (GM), 4.3

(PAS). ML 4.7 (BRK), 4.5 (GS). Felt in Inyo and Tuolumne Counties, California.

19 00 12 18.04 37.114 N 117 867 W 5 34 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.1 (GM),3.0 (PAS).

19 00 53 56.3% 44.509 N 7 273 E 10 G 0.2 6 NORTHERN ITALY. ML 1.9 (GEN). 19 01 07 02.7? 37.26 N 29.11 E 10 G 0.3 5 TURKEY. ML 3.1 (ISK). 19 01 44 02.1? 37.26 N 29 05 E 10 G 0.3 5 TURKEY. ML 2-9 (ISK). 19 01 52 50.44 35.710 N 90.380 W 5 G 11 ARKANSAS. <SLM-P>. MD 2.7 (SLM). Felt (IV) at Riverdale

and (III) at Lepan ta.19 03 07 09.1? 31.24 S 69.07 W 120 G 0.2 5 SAN JUAN PROVINCE, ARGENTINA 19 03 17 48.24 37.137 N 117 783 W 2 55 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.6 (GM).

ML 3.9 (BRK). 3 5 (GS). 19 03 18 57.2 37.122 N 117.715 W 5 G 0.9 12 CALIFORNIA-NEVADA BORDER REGION. ML 3.7 (GS). MD 3.6

(PAS). 19 03 20 58.04 37.147 N 117 790 W 6 4.4 108 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 4.4 (GM),

4.3 (PAS). ML 4.8 (BRK), 4.5 (GS) .19 03 46 48.8* 0.660 S 20.526 W 10 G 4.4 1.1 19 CENTRAL MID-ATLANTIC RIDGE 19 03 56 08.4 41.046 N 141.979 E 71 46 1.0 31 HOKKAIDO, JAPAN REGION 19 04 03 35.9 26.890 N 54.603 E 33 N 4.5 1.0 44 SOUTHERN IRAN19 04 09 08.6* 26.805 S 26.722 E 5 G 1.3 10 REPUBLIC OF SOUTH AFRICA. ML 3.3 (PRE). 19 04 28 42.6% 31.240 S 68 651 W 115 0.7 8 SAN JUAN PROVINCE, ARGENTINA 19 04 42 49.54 37 150 N 117.805 W 7 44 CALIFORNIA-NEVADA BORDER REGION. <GM-P>. MD 3.3 (GM).

ML 3.0 (GS).19 05 20 46.04 58.361 N 152.412 W 35 49 KODIAK ISLAND REGION. <AEIC>. ML 3.1 (AEIC). 19 06 08 51.0* 11 187 S 166.199 E 83 4.8 0.9 23 SANTA CRUZ ISLANDS19 06 13 05.74 61.281 N 147.008 W 19 46 SOUTHERN ALASKA. <AEIC>. ML 2.5 (AEIC). 19 06 32 18.5% 43.530 N 11.249 E 10 G 0.2 5 CENTRAL ITALY19 06 45 48.0? 39.27 N 28.04 E 10 G 037 TURKEY ML 3.5 (ISK). Felt at Balikesir. 19 07 24 09.9% 60.558 N 2.137 E 10 G 1.0 9 NORTH SEA. MD 2.4 (BER). 19 07 27 29.9? 21.89 S 68.67 W 33 N 135 CHILE-BOLIVIA BORDER REGION19 07 29 35.14 60.972 N 149.942 W 37 48 KENAl PENINSULA, ALASKA. <AEIC>. ML 2.5 (AEIC). 19 08 04 55.2 31.409 S 69.258 W 130 07 21 SAN JUAN PROVINCE. ARGENTINA. MD 4.2 (SAN). 19 08 05 56.44 34.384 N 116.457 W 2 10 SOUTHERN CALIFORNIA. <PAS-P>. ML 2.9 (PAS).

MAr 1993 PAGE 16

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ISLAND. N.Z.ALEUTIAN IS.

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PAGE 17 MAY 1993

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TURKEY ML 2.6 (ISK).TURKEY. ML 2.8 (ISK).STRAIT OF GIBRALTAR. mbLg 3.5 (MOD)Chafarinas Islands, Spain.SOUTHERN CALIFORNIA. <PAS-P>SAN JUAN PROVINCE, ARGENTINASICILYTURKEY. ML 2.7 (ISK).SICILYECUADORCENTRAL ITALYTURKEY. ML 2.6 (ISK ) .NORTHWESTERN BALKAN REGION.SICILYSICILYHALMAHERA, INDONESIASICILYNEAR EAST COAST OF HONSHU, JAPANTURKEY. ML 2.9 (ISK).SICILYSICILYSICILYPYRENEES. ML 3.3 (LOG).the Locq Oilfield area,TURKEY. ML 2.6 (ISK).GREECETURKEY. ML 2.6 (ISK).NORTHWESTERN BALKAN REGION. ML 2.7 (SKO)SAN JUAN PROVINCE, ARGENTINASICILYREPUBLIC OF SOUTH AFRICATURKEY. ML 2.7 ( ISK) .SOUTHERN CALIFORNIA. <PAS-P>.SOUTHERN CALIFORNIA. <PAS-P>.Fe I t at Whi te Water.FOX ISLANDS, ALEUTIAN ISLANDSREPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE)SAN JUAN PROVINCE, ARGENTINAOFF COAST OF NORTHERN CALIFORNIA.MD 3.3 (GM).SPAIN. mbLg 2.8 (MOD).CHILE-ARGENTINA BORDER REGION. MD 3.4 (SAN)EGYPT. MD 3.4 (HLW).STRAIT OF GIBRALTARTONGA ISLANDSJUJUY PROVINCE, ARGENTINA. Foreshack.broadband displacement seismogroms.JUJUY PROVINCE, ARGENTINA. Mw 7.0 (GS), 7.0 (HRV)6.6 (BRK). Mo-7.1«10««19 Nm (PPT). Felt in Jujuy, Saltoond Tucuman Provinces. Also felt (V) in theAn tofagasta-TaI taI-CaIama area; (IV) at Mejillones, SanPedro and Tocopilla; (III) at Iquique and (II) atCopiapa, Chile. Felt (III) at Arequipa, Peru.REPUBLIC OF SOUTH AFRICA. ML 3.8 (PRE).BANDA SEASOUTHERN CALIFORNIA. <PAS-P>. ML 3.2 (PAS). Felt.JAWA, INDONESIACHILE-ARGENTINA BORDER REGIONOFF COAST OF COSTA RICAVANUATU ISLANDSOFF E. COAST OF N. ISLAND, N.Z. ML 4 5 (WEL).NORTHERN ITALYNORTHERN ITALY. ML 2.4 (LOG), 2.3 (GEN).JUJUY PROVINCE. ARGENTINAWINDWARD ISLANDS. ML 3.1 (FDF).TURKEY. Felt in the Denizli area.PYRENEES. ML 1.0 (STR).SOUTHERN ITALYSAN JUAN PROVINCE. ARGENTINATONGA ISLANDSNEAR COAST OF GUERRERO, MEXICOKENAI PENINSULA. ALASKA. <AEIC>. ML 3.6 (AEIC). 3.8(PMR). Felt (V) at Anchorage; (III) at Cooper Landing,Eagle River and Hope; (II) at PalmerSAN JUAN PROVINCE. ARGENTINASPAIN. mbLg 3.5 (MOD). Felt (III) in the Bunol area.OFF COAST OF CENTRAL CHILE. MD 4.1 (SAN).SANTA CRUZ ISLANDSTURKEY. ML 2.7 (ISK).TURKEY. ML 2.7 (ISK).TURKEY. ML 2.7 (ISK).TURKEY. ML 2.6 (ISK).NEAR EAST COAST OF HONSHU, JAPANHINDU KUSH REGION, AFGHANISTANTURKEY. ML 2.8 ( ISK) .CHILE-ARGENTINA BORDER REGION. MD 4.1 (SAN).TURKEY. ML 2.7 (ISK).NEAR WEST COAST OF HONSHU, JAPANOFF W. COAST OF S. ISLAND. N.Z. ML 4 0 (WEL).NORTH ISLAND, NEW ZEALANDTURKEY. ML 2.8 (ISK).CZECH AND SLOVAK REPUBLICS. MG 2.7 (WAR).TURKEY. ML 2.6 (ISK).

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PAGE 21 MAY 1993

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MAY 1993 PAGE 22

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PAGE 23 MAY 1993

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GREENLAND SEACENTRAL ALASKA <AEIC>. ML 2.8 (AEIC), 3.1 (PMR).GREECENORTHERN ITALY ML 2.4 (LOG), 2.2 (GEN).NORTHERN ITALY. ML 2.0 (GEN).TURKEY ML 2.8 ( ISK) .GREECEGULF OF CALIFORNIAGREECE. ML 3. 7 (ATH) .WINDWARD ISLANDS. MD 3.0 (TRN).GREECENEW IRELAND REGION, P.N.G. Mw 5.2 (HRV).SOLOMON ISLANDSNORTHERN CALIFORNIA. <GM-P> . MD 3.2 (GM).CHILE-ARGENTINA BORDER REGION. MD 3.7 (SAN).SOUTHERN CALIFORNIA. <PAS-P> . ML 2.9 (PAS).SOUTHERN CALIFORNIA. <PAS-P>. ML 2.8 (PAS).CHILE-ARGENTINA BORDER REGIONHALMAHERA, INDONESIAREPUBLIC OF SOUTH AFRICA. ML 2.7 (PRE).CENTRAL ITALYNORWEGIAN SEA. MD 2 . 7 (BER).ANOREANOF ISLANDS, ALEUTIAN IS. ML 5.0 (PMR).SOUTH OF HONSHU, JAPANNORTHERN ITALY. ML 1.6 (GEN).SAN JUAN PROVINCE, ARGENTINACENTRAL ALASKA. <AEIC>.POLANDNEAR COAST OF CENTRAL CHILE. MD 3.7 (SAN).REPUBLIC OF SOUTH AFRICA. ML 2.1 (PRE).PAK I STANLEEWARD ISLANDS. MD 2.8 (TRN).SWITZERLAND. ML 2.2 (LOG). 2.0 (STR).OFF COAST OF CENTRAL CHILE. MD 3.6 (SAN).NORTHWESTERN BALKAN REGION. ML 3.2 (TTG). 2.9 (SKO).Felt (IV) in the Skopje, Yugoslavia area.S ICI LYNORTH OF ASCENSION ISLANDKENAI PENINSULA. ALASKA. <AEIC>. ML 3.3 (AEIC).GREECE. ML 3.6 (ATH)SAN JUAN PROVINCE. ARGENTINAKENAI PENINSULA. ALASKA. <AEIC>. ML 2.7 (AEIC).SAN JUAN PROVINCE, ARGENTINAGULF OF CALIFORNIAREPUBLIC OF SOUTH AFRICAPOLAND ML 3 4 (VIE).NORTHERN CALIFORNIA. <GM-P>. MD 3.4 (GM).AEGEAN SEA. ML 3.1 ( I SK ) .TURKEY . ML 2 6 ( ISK) .BANDA SEAJUJUY PROVINCE. ARGENTINAKAMCHATKANORTHERN ITALY. ML 1.9 (GEN).CHILE-BOLIVIA BORDER REGIONCANARY ISLANDS REGION. MD 3.3 (MOD).TURKEY . ML 2.8 ( ISK) .TURKEY ML 2.8 ( ISK) .YUNNAN. CHINACALIFORNIA-NEVADA BORDER REGION. <GM-P> . MD 3 . 1 (GM)GREECEBULGAR 1 AVENEZUELA. MD 3.4 (CAR).VENEZUELA. MD 3.0 (CAR) .KURIL ISLANDSTURKEY. ML 2.8 ( 1 SK ) .NORTHWESTERN BALKAN REGION. ML 1 . 5 (SKO).TURKEY. ML 2.7 ( I SK ) .REPUBLIC OF SOUTH AFRICA. ML 2.3 (PRE).NEAR N COAST OF NEW GUINEA. PNG. Mw 5.8 ( GS ) , 5.8(HRV) Depth from broadband displacement seismogramsGREECE ML 2.9 (ATH) .TONGA ISLANDS. Mw 5 . 4 (HRV).TURKEY ML 3 4 ( ISK) .TURKEY ML 3 3 ( I SK )CALIFORNIA-NEVADA BORDER REGION. ML 4.0 ( GS ) , 4.4(BRK) .ADRIATIC SEATURKEY. MD 4 1 (ATH). ML 4 0 (ISK). Felt at Kutahya.TURKEYSOUTHERN GREECEREPUBLIC OF SOUTH AFRICA. ML 2.3 (PRE).NEW BRITAIN REGION. P.N.G. Mw 5.7 (GS). 5.6 (HRV).Depth from broadband displacement seismograms.TURKEY ML 2.7 ( 1 SK ) .TURKEY . ML 3.0 ( ISK) .HALMAHERA, INDONESIA. Mw 6.1 ( GS ) . 6.1 (HRV). Depthfrom broadband displacement seismograms.HALMAHERA. INDONESIATURKEY. ML 3 5 ( ISK) .TURKEY . ML 3 3 ( I SK) .PERU-BRAZIL BORDER REGIONNORTHERN ITALY ML 2 3 (GEN).SOUTHERN ALASKA <AEIC>.

PAGE 25 MAY 1993

18 39 39.34 48.276 N 124.478 10 33

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. 244 N. 991 N.938 S.94 N. 291 N.19 N.698 S

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.767 S

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. 135 N834 N.373 N241 N28 S.553 N.264 N888 S.647 N196 S.912 N

255 N332 N

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MD 4.2 (ATM).

MD 4.6 (TTG), 4.3 (ATM)

MD 3.2 (ATM) ML 3.4

NEAR COAST OF NORTHERN CALIF. <BRK>. ML 3.3 (BRK). MD3.2 (GM).NEAR S. COAST OF HONSHU, JAPANTURKEY. ML 2.9 (ISK).OAXACA. MEXICOCHILE-ARGENTINA BORDER REGION. MD 3.9 (SAN).TURKEY. ML 3.8 (ISK).TURKEY. ML 2.6 ( ISK).MONA PASSAGENEAR COAST OF CENTRAL CHILE. MD 4.6 (SAN). Felt (IV) atVaI para i so.NORTHWESTERN BALKAN REGION. ML 2.7 (VIE). MD 3.2 (LJU).Felt (IV) at Ravne no Karoskem, Slovenia.SOUTH OF ALASKAPUERTO RICO REGIONCRETETURKEY. ML 3.1 (ISK).OFF COAST OF NORTHERN CHILESOUTHERN MOLUCCA SEA. Mw 5.7 (HRV).KURIL ISLANDSSOUTHERN MOLUCCA SEAGREECE-ALBANIA BORDER REGIONSOUTHERN ALASKA. <AEIC>.GREECE-ALBANIA BORDER REGIONSOUTHERN IRANHINDU KUSH REGION, AFGHANISTANSICILYSOUTHERN MOLUCCA SEAGREECE-ALBANIA BORDER REGION(TIR).MONA PASSAGENORTHERN CALIFORNIA. <GM-P>. MD 3.8 (GM).HOKKAIDO, JAPAN REGIONAUSTRIA. ML 2.8 (FUR), 2.6 (GRF).SAN JUAN PROVINCE. ARGENTINANEAR COAST OF GUERRERO, MEXICOGREECE-ALBANIA BORDER REGION. MD 3.8 (ATH).CHILE-ARGENTINA BORDER REGION. MD 3.4 (SAN).DODECANESE ISLANDS. ML 4.8 (ATH), 3.9 (ISK).CHILE-ARGENTINA BORDER REGION. MD 3.6 (SAN).NEAR S. COAST OF HONSHU. JAPAN. Felt (IV JMA) at Atamiand I to.GREECE-ALBANIA BORDER REGION. MD 2.9 (ATH)GREECE-ALBANIA BORDER REGION(ATH).NEAR COAST OF VENEZUELA. MD 3.2 (TRN).SAN JUAN PROVINCE, ARGENTINAGREECE. MD 3.8 (ATH).AUSTRIA. ML 2.e (VIE).ROSS SEA. Mw 5.5 (HRV). Believed to be the firstinstrumento I Iy located hypacenter in this areo.SOUTHERN CALIFORNIA. <PAS-P>. ML 3.9 (PAS), 4.4 (BRK),3.8 (GS). Felt (IV) at Fawnskin. Redlands and RunningSprings. Also felt at Highland and Forest Falls.SPA IN. mbLg 2.8 (MOD).TURKEY. ML 2.7 (ISK).SAN JUAN PROVINCE. ARGENTINAKODIAK ISLAND REGION. <AEIC>.ROMAN I AGREECE-ALBANIA BORDER REGION. ML 3.6 (TIR). MD 3.5(ATH).AFGHANISTAN-TAJIKISTAN BORD REG.GALAPAGOS ISLANDSCOSTA RICALEEWARD ISLANDSREPUBLIC OF SOUTH AFRICAREPUBLIC OF SOUTH AFRICAHINDU KUSH REGION. AFGHANISTANSANTA CRUZ ISLANDSCHILE-ARGENTINA BORDER REGION.AFGHANISTAN-TAJIKISTAN BORD REGCENTRAL ITALYLEEWARD ISLANDS. ML 3.8 (FDF).KERMADEC ISLANDS REGION. Mw 5.1SAN JUAN PROVINCE, ARGENTINATURKEYCENTRAL ALASKA <AEIC>. ML 2.7 (AEIC)

ML 3.7 (TIR). MD 3.5

ML 2.5 (PRE). ML 2.8 (PRE).

MD 3.5 (SAN)

(HRV)

PAGE 26


01 01 43 26.97 15.721S 69.357W 260km4.8mb ( 50 obs.)PERU-BOLIVIA BORDER REGIONCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 31S, 43CCentroid Location:Origin Time 01:43:33.8 0.3Lot 15.64S 0.04 Lon 69.37W 0.05Dep 264.7 1.8 Half-duration 1 3Pr i nc i pa I Axes:

Scale 10**17 NmT Val- 1.47 Pig-39 Azm-332 N 0.02 19 79 P -1.50 45 189

Best Double Coup Ie:Mo-1 .5*10** 17 NP1 :Strike-357 Dip-19 Slip 172 NP2: 260 87 -71

01 02 48 55.89 26.414N 127.269E 55km5.4mb ( 94 obs.)RYUKYU ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 28S, 44CCen t ra i d Loco t i on:Origin Time 02:46:58.8 0.4Lot 25 86N 0.04 Lon 126.63E 0.04Dep 63.7 2.1 Half-duration 1.3Pr i nc i pa I Axes:

Scale 10**17 NmT Vol- 1.76 Pig-41 Azm-228 N 0.27 47 24 P -2.04 12 127

Best Double Coup Ie:Ma-1.9*10** 17 NP1:Strike-259 Dip-53 Slip- 157 NP2 4 72 40

01 08 52 55.24 3.771S 131.378E 24km 5.4mb ( 40 obs.) 4.9Msz ( 32 obs.) IRIAN JAVA REGION, INDONESIA CENTROID, MOMENT TENSOR (HRV) Dato Used: GDSN L.P.B.: 20S, 24C Centroid Location:Origin Time 08:52:59.1 0.7 Lot 3.78S 0.08 Lon 131.69E 0.08 Dep 29.1 5.0 Half-duration 1.1 Pr i nc i pa I Axes:

Scale 10*»16 Nm T Vol- 11.94 Pig-58 Azm-206N -1.78 12 316P -10.15 29 53

Best Double Coup Ie:Mo-1.1 10** 1 7NP1:Strike-174 Dip-19 Slip- 129NP2: 313 75 78

02 11 26 54.87 56.415S 24.491W 13km 6.3mb ( 33 obs.) 6.4Msz ( 38 obs.) SOUTH SANDWICH ISLANDS REGION RADIATED ENERGYNo. of sta: 5 Focal mech. C Energy 1.1±0.3*10»*14 Nm


Scole 10**18 Nm T Val- 4.35 Pig-19 Azm-264 N -0.01 24 166 P -4.35 59 28

Best Double Coup Ie:Mo-4.4*10** 18 NP1:Strike- 28 Dip-34 Slip- -43 NP2: 155 68 -116

CENTROID, MOMENT TENSOR (HRV) Dato Used: GDSNL.P.B.: 47S. «*C M.W.: 35S, 73C Centroid Location: Origin T i me 11-27: 4.00.1 Lot 56.45S 0.01 Lon 23 92W 0.01 Dep 15.0 BDY Half-durotion 4.1 Pr i nc i pa I Axes :

Scale 10**18 NmT Vol- 5.40 Pig-19 Azm-241N -0.57 10 148P -4.83 68 30

Best Double Couple Mo-5.1 10** 18NP1 Strike-348 Dip-28 Slip- -67NP2: 143 64 -102

02 15 11 55.26 .971N 27.794W 10km

5 obs .4.7mb ( 17 obs.) 4.9Msz ( CENTRAL MID-ATLANTIC RIDGE CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 15S, 21C Centroid Location:Origin T ime 15:12: 1.30.7 Lat 1.20N 0.09 Lon 27.89W 0.06 Dep 15.0 FIX Half-duratian t.3 Pr i nc i pa I Axes:

Scale 10**17 NmT Val" 2.05 Pig- 6N -0.08 64P -1.97 1

Azm- 38 228 128

Best Double Coup Ie:Mo-2.0*10** 17 NP1:Strike-173 Dip-85 Slip- 4 NP2: 83 86 175

02 15 26 02.58 21.151S 175.883W 120km 5.7mb ( 64 abs.) TONGA ISLANDSFAULT PLANE SOLUTION: P-Waves NP1:Strike- 33 Dip-57 Slip 107 NP2: 242 37 -66


Comment: The focal mechanism is poorly controlled and corresponds to normal faulting with a moderate strike slip component. The preferred fault plane is not determined.

RADIATED ENERGYNa. of sta: 9 Focol mech. F Energy 1 .6±0.4*10** 12 Nm

CENTROID. MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 23S, 41C Centroid Location:Or igi n T ime 1 5:26: 10.4 0 . 6Lot 20.93S 0.07 Lon 175.71W 0.06Dep 154.6 2.0 Half-duration 1.5Pr i nc i pa I Axes:


8est Double Coup Ie.Mo-3.4»10** 17NP1:Strike-270 Dip-43 Slip- -45NP2: 36 61 -124

02 21 15 23.56 59.852S 26.302W 33km 5.3mb ( 22 obs.) 5.3Msz ( 6 obs.) SOUTH SANDWICH ISLANDS REGION CENTROID. MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 29S, 51C Centraid Location:Origin Time 21:15:28.0 0.3Lat 60.33S 0.05 Lon 25.92W 0.09Dep 35.3 3.5 Half-duration 1.2Pr i nc i pa I Axes:

Scale 10**17 NmT Val- 1.43 Pig-33 Azm- 3N 0.57 16 103P -2.01 53 215

Best Double Coup Ie:Ma-1.7 * 10* 17NP1:Strike- 49 Dip-19 Slip 146NP2: 286 79 -74

03 23 15 06.66 14 . 404S 173.021W 23km 5.1mb ( 3 obs.) 4.9Msz ( 4 obs.) SAMOA ISLANDS REGION CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 14S, 21C Cen t ro i d Loco t i on:Origin Time 23:15:10.8 1.0 Lot 14 83S 0.11 Lon 173.07W 0.10 Dep 15.0 FIX Hoif-durotion 1.1 Pr i nc i poI Axes:

Scale 10**17 NmT Val- 1.47 Pig-41 Azm-321N -0.24 21 211P -1.23 42 101

Best Double Coup Ie:Mo-1 .4«10» 17NP1 : Stri ke-120 Dip-21 Slip- -1NP2: 211 90 -111

04 00 09 32.72 27.973S 176.670W 59km5.3mb ( 28 obs.)KERMADEC ISLANDS REGIONCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.6.: 32S. 62CCen t ro i d Loca t i on:Origin Time 00:09:34.3 0.3Lat 27.65S 0.05 Lan 176.42W 0.04Dep 15.0 BDY Half-duration 1.6Pr i nc i poI Axes:

Seal* 10««17 Nm T Val- 3.20 Pig-56 Azm-282 N 0.34 4 187 P -3.54 34 94

Best Double Coup Ie:Ma-3.4*10** 17 NP1:Strike-169 Dip-12 Slip- 72 NP2: 7 79 94

04 06 48 23.55 9.669N 125.303E 39km 5.4mb ( 48 obs.) 4.6Msr ( 14 obs.) MINDANAO, PHILIPPINE ISLANDS CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 18S, 20C Centroid Location:Origin Time 06:46:22.8 0.6Lat 9.73N 0 06 Lan 125.42E 0.08Dep 27.2 4.9 Half-duration 1.1Pr i nc i pa I Axes:

Scale 10**16 NmT Val- 7.10 Pig-73 Azm- 47N -1.02 0 138P -6.08 17 228

6est Double Coup Ie:Ma-6.6*10** 16NP1:Strike-318 Dip-28 Slip- 90NP2: 138 62 90

05 11 38 27.25 19.547S 68.978W 131km5.2mb ( 59 obs.)CHILE-60LIVIA 60RDER REGIONCENTROID, MOMENT TENSOR (HRV)Dota Used: GDSNL.P B.: 13S, 16CCentroid Location:Origin T ime 11:38:33.9 0.5Lot 20.19S 0.07 Lon 69.32W 0.08Dep 140.2 3.2 Half-duration 1.1P r i ncipa I Axes:

Scale 10*»17 Nm T Val- 1.86 Pig-20 Azm- 77 N -0.64 60 204 P -1.22 22 339

6est Double Coup Ie:Ma-1.5*10** 17 NP1 : St r i ke-1 19 Dip-60 Slip 178 NP2: 28 88 -30

05 18 21 31.73 39.097N 141.678E 100km 5.3mb ( 93 abs.) EASTERN HONSHU, JAPAN CENTROID. MOMENT TENSOR (HRV) Data Used: GDSN L.P.6.: 23S, 35C Cen t ro i d Locat i on:Or igi n T ime 18:21:34.2 0.3Lat 39.29N 0.04 Lon 141.47E 0.04Dep 107.6 2.9 Half-duration 1.3Pr i nc i pa I Axes:


6est Double Coup Ie:Mo-1 .4*10** 1 7NP1:Strike-300 Dip-29 Slip 138NP2: 171 71 -68

06 05 42 03.06 0.895N 123.171E 37km 5.2mb ( 42 abs.) 4.9Msz ( 10 obs.) MINAHASSA PENINSULA, SULAWESI CENTROID, MOMENT TENSOR (HRV) Dota Used: GDSN L.P.6.: 36S. 60C Centroid Location:Origin Time 05:42: 9.6 0.5 Lat 1.35N 0.04 Lon 123.18E 0.04 Dep 31.9 2.3 Half-duration 1.1 Pr i nc i pa I Axes:

Scale 10»»17 Nm T Val- 1.50 Pig-68 Azm-244 N 0.09 18 100

PAGE 27 MAY 1993

P -1.59 12 6Best Double Couple Mo-1 .5*10** 17NP1:Strike- 74 Dip-37 Slip- 59NP2: 292 59 111

06 07 58 47.96 46.711N 153.513E 37km5.7mb ( 97 obs.) 5.3Msr ( 33 obs.)KURIL ISLANDSCENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.8.: 39S. 82CCentroid Locotion:Origin Time 07:58:51.6 0.2Lot 46.64N 0.02 Lon 153.82E 0.02Dep 46.6 1.3 Ho I f-durotion 1.7Pr i nc i poI Axes:

Scole 10**17 NmT Vol- 3.72 Pig-73 Arm-326 N 0.06 9 206 P -3.77 14 114

Best Double Coup Ie:Mo-3.7 * 10** 17 NP1:Strik«-192 Dip-31 Slip- 73 NP2: 31 60 100

06 13 03 18.11 8.472S 71.485W 573km 5.8mb (113 obs.) WESTERN BRAZILFAULT PLANE SOLUTION: P-Woves NP1:Strike-170 Dip-45 Slip- -90 NP2: 350 45 -90

Pr i nc i poI Axes:T Pig- 0 Arm- 80 P 90 0

Comment: The focol mechonism is poorly controlled ond corresponds to normol faulting. The preferred fault plane is not determined.

RADIATED ENERGYNo of sto: 18 Focol m«ch. F Energy 9.2±1 . 5*10 * * 12 Nm

MOMENT TENSOR SOLUTION Dep 568 No. of sto: 24 Pr i nc i poI Axes:

Scole 10**18 NmT Vol- 1.61 PI g- 4 Azm- 64 N -0.23 32 156 P -1 38 57 328

Best Double Coup Ie.Mo-1 . 5* 1 0** 18 NP1:Strike-124 Dip-50 Slip 134 NP2. 1 57 -50

CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 42S, 99C Centroid Locotion:Origin Time 13:03:25.4 0.1 Lot 8.33S 0.01 Lon 71.38W 0.02 Dep 595.3 0.9 Half-duration 2.9 Principal Axes:

Sco I e 10**18 NmT Vol- 1.74 Pig- 4 Arm-243N 0.10 11 152P -1.85 79 350

Best Double Coup Ie:Mu-1 .8*10** 18NP1:Strike-344 Dip-43 Slip- -74NP2: 143 49 -104

06 20 35 55.62 14.395N 40.126E 10km5.1mb ( 55 obs.) 4.7Msz ( 2 obs.)ETHIOPI ACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 23S, 39CCentroid Locotion:Origin Time 20:36: 2.9 0.5Lot 14.52N 0.06 Lon 40.14E 0.04Dep 15.0 FIX Half-duration 1.1Pr i nc i poI Axes.

Scole 10**16 NmT Vol- 9.38 Pig- 0 Arm-247 N -1 . 09 0 157 P -8.28 90 180

Best Double Couple.Mo-8 8*10**16 NP1.Strike-337 Dip-45 Slip- -90 NP2: 157 45 -90

09 07 51 59.60 7 918N 125.996E 46km 4 9mb ( 32 obs ) 4.7Msz ( 4 obs.) MINDANAO, PHILIPPINE ISLANDS CENTROID. MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 18S, 26C Cen t ro i d Locot i on:

Or igi n T ime 07 : 51 . 59.7 0.7 Lot 8.16N 0.07 Lon 126 23E 0.08 Dep 33.7 6.1 Ho I f-durotion 1.0 Pr i nc i poI Axes:

Scole 10**16 NmT Vol- 7.79 Pig-12 Azm-203N 0.28 78 11P -8.07 2 112

Best Double Coup Ie:Mo-7.9*10** 16NP1:Strike-247 Dip-80 Slip- 173NP2: 338 83 10

10 02 01 10.83 35.536S 103.950W 10km4.7mb ( 3 obs.) 5.1Msr ( 2 obs.)SOUTHERN PACIFIC OCEANCENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 37S, 65CCent raid Loco t i on:Origin Time 02:01:14.6 0.3Lot 35.71S 0.03 Lon 103.80W 0.03Dep 15.0 FIX Half-durotion 1.3Pr i nc i poI Ax«s:

Scole 10**17 Nm T Vol- 1.56 Pig- 0 Azm-234 N 0.09 90 180 P -1.66 0 144

Best Double Coup Ie:Mo-1.6*10** 17 NP1:Strike-279 Dip-90 Slip 180 NP2 : 990 0

10 04 03 41.26 53.024S 118.037W 10km 5.1mb ( 11 obs.) 5.6Msr ( 9 obs.) SOUTHERN EAST PACIFIC RISE CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 42S, 91C Cent ro i d Locot i on: Origin Time 04:03:51.4 0.1 Lot 53.38S 0.02 Lon 117.96W 0.03 Dep 15.0 FIX Hoif-durotion 2.1 Pr i nc i pol Axes:

Scole 10**17 NmT Vol- 6.40 Pig-15 Azm- 66N -1.07 73 222P -5.33 7 334


11 02 51 41.77 2.345N 99.885W 10km 5 0mb ( 22 obs ) 4.9Msz ( 20 obs.) WEST OF GALAPAGOS ISLANDS CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.. 37S, 63C Centroid Locotion:Origin Time 02:51:49.2 0.3 Lot 2.31N 0.04 Lon 99.66W 0.04 Dep 15.0 FIX Hoif-durotion 2.1 Pr i nc i pol Axes:

Scole 10**17 NmT Vol- 2.80 Pig- 4 Azm-344N -0.15 72 87P -2.65 18 252

Best Double Couple:Mo-2.7*10** 17NP1:Strike- 29 Dip-74 Slip 170NP2: 297 81 -16

11 16 24 59.58 24.919S 70.464W 47km 5.4mb ( 49 obs.) 4.9Msz ( 30 obs.) NEAR COAST OF NORTHERN CHILE CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 37S, 79C Centroid Locotion:Or i gi n T ime 16:25: 7.20.2 Lot 24.71S 0.02 Lon 70.45W 0.03 Dep 62.4 3.3 Half-duration 1.8 P r i nc i poI Axes:

Scole 10**17 NmT Vol- 4.27 Pig-44 Azm- 85N -0.13 8 183P -4.15 45 281

Best Double Coup Ie.Mo-4.2*10** 17NP1:Strike- 99 Dip- 8 Slip 175NP2: 3 89 -82

11 18 26 51.32 7.219N 126.570E 59km 6.1mb (137 obs.) 6.6Msz ( 61 obs.) MINDANAO, PHILIPPINE ISLANDS FAULT PLANE SOLUTION: P-Woves NP1:Strike- 10 Dip-63 Slip- 90

NP2: 190 27 90Pr i nc i poI Axes:

T Pig-72 Arm-280 P 18 100

Comment: The focol mechonism is poorly controlled ond corresponds to reverse faulting. The preferred fault pi one i s NP2.

RADIATED ENERGYNo. of sto: 12 Focol mech. M Energy 1 .0±0.3*10** 14 Mm

MOMENT TENSOR SOLUTIONDep 43 No. of sto: 25Pr i nc i poI Axes:

Scole 10**19 Nm T Vol- 3.76 Pig-58 Azm-342 N 0.00 32 174 P -3.77 5 81

B«st Doubl* Coupl«:Mo-3.8*10**19 NP1:Strike-141 Dip-48 Slip- 46 NP2: 17 58 128

CENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 45S, **C M.W.: 44S. **CCentroid Locotion:Or igin T ime 18 : 26:59.7 0.1Lot 7.07N 0.01 Lon 127.00E 0.01Dep 46.5 0.3 Ho If-durotion 7.1Pr i nc i poI Axes:

Scole ie**19 Nm T Vol- 3.39 Pig-71 Azm- 4 N -0.06 19 195 P -3.33 3 104

Best Doubl* Coup Ie:Mo-3.4*10** 19 NP1 :Strike-1 75 Dip-45 Slip- 63 NP2: 31 51 114

12 11 59 14.32 20.460S 177.812W 531km5.3mb ( 56 obs.)FIJI ISLANDS REGIONCENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 30S. 47CCent ro i d Loco t i on:Origin T ime 11:59:18.90.+Lot 20.23S 0.05 Lon 177.89W 0.03Dep 521.6 2.3 Ho I f-durotion 1.4Pr i nc i poI Axes:

Scole 10**17 Nm T Vol- 2.19 Pig-12 Arm- 78 N -0.32 28 174 P -1.87 59 326

Best Double Coup Ie:Mo-2.0*10**17 NP1:Strike-137 Dip-41 Slip 135 NP2: 10 63 -59

12 13 06 44.02 3.836S 135.481E 33km 5.0mb ( 32 obs.) 5.3Msz ( 29 obs.) IRIAN JAYA REGION, INDONESIA CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 25S, 43C Centroid Locotion: Origin Time 13:06:45.9 0.4 Lot 3.79S 0.05 Lon 135.31E 0.06 Dep 15.0 FIX Hoif-durotion 1.8 Pr i nc i poI Axes:

Scole 10**17 Nm T Vol- 2.56 Pig-19 Arm-287 N -0.91 68 136 P -1.65 10 21

Best Double Coup Ie:Mo-2.1 * 10** 17 NP1:Strike- 65 Dip-69 Slip- 7 NP2: 333 84 159

13 10 24 40.40 61.988N 147.033W 59km5.3mb ( 92 obs. )SOUTHERN ALASKACENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 27S, 42CCentroid Locotion:Origin Time 10:24:45.5 0.3Lot 61.69N 0.06 Lon 147.25W 0.09Dep 69.4 3.3 Ho I f-durotion 1.0Pr i nc i poI Axes:

Scole 10**16 NmT Vol- 7.14 Pig- 4 Azm-315 N -2.30 6 46 P -4.83 82 190

Best Double Coup Ie:Mo-6.0*10** 16 NPl.Strike- 39 Dip-41 Slip- -99

MAY 1993 PAGE 28

NP2: 231 -82

13 11 59 49.25 55.177N 160.458W 32km 6.4mb (165 obs.) 6.8Msz ( 45 obs.) ALASKA PENINSULA FAULT PLANE SOLUTION: P-Wov«s NP1:Strik«- 57 Dip-73 Slip- 90 NP2: 237 17 90


Comment: Th« facal mechanism is poorly controlled and corresponds ta reverse faulting. The preferred fault pi ane i s NP2.

RADIATED ENERGYNo. af sta: 33 Focal mech. M Energy B.6±1 . 1 * 19** 13 Nm

MOMENT TENSOR SOLUTION Dep 29 No. af sta: 42 Pr i nc i pa I Axes:


Best Double Coup Ie.Mo-2.3*10* 19 NP1:Strike-229 Dip-20 Slip- 79 NP2: 61 70 94

CENTROID, MOMENT TENSOR (HRV) Data Used: GDSNL.P.B.: 48S, »*C M.W.: 45S, **C Centraid Location: Origin Time 11:59:56.5 0.1 Lot 54.70N 0.01 Lan 159.95W 0.01 Dep 40.7 BDY Half-duration 6.8 Pr i nc i pa I Axes:

Scole 10** 19 NmT Vol- 2.44 Pig-66 Azm-329N 0.03 1 61P -2.47 24 151

Best Double Coup Ie:Mo-2.5«10* 19NP1:Strike-243 Dip-21 Slip- 93NP2: 60 69 89

13 23 41 38.43 55.017N 160.162W 33km5.3mb ( 96 obs.)ALASKA PENINSULACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.. 9S, 10CCentraid Location:Or i gin T ime 23:41 :43.1 1.7Lot 54.89N 0.17 Lon 159.84W 0.21Dep 40.810 3 Half-durotion 1.0Pr i nc i pa I Axes:

Seale 10«* 16 Nm T Vol- 3.34 Pig-73 Azm-322 N 2.58 0 232 P -5.92 17 142

Best Double Coupl e:Ma-4.6*10* 16 NP1:Strike-232 Dip-28 Slip- 90 NP2: 52 62 90

14 10 00 27.39 2.374N 126.741E 36km5.3mb ( 41 abs.)NORTHERN MOLUCCA SEACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 27S, 34CCentroid Location:Origin Time 10:00:33.7 0.4Lot 2.80N 0.06 Lan. 126.88E 0.06Dep 52.6 3.7 Half-duration 1.0P r i nc i pa I Axes:

Scale 10**16 NmT Vol- 9.26 Pig-49 Azm- 40 N -1.64 39 198 P -7.62 11 297

Best Double Coup Ie:Mo-8.4«10* 16 NP1:Strike- 65 Dip-48 Slip- 148 NP2: 178 67 47

14 21 29 45.04 10.823S 161.358E 25km 5.4mb ( 46 obs.) 5.2Msr ( 12 obs.) SOLOMON ISLANDSCENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 36S, 60C Cen t ro i d Loco t i an:Origin T ime 21 :29:50.8 0.2 Lot 10.84S 0.03 Lon 161 55E 0.03 Dep 31.7 2.2 Half-duration 1.3

Pr i nc i pa I Axes: Scole 10**17 Nm T Val- 1.50 Pig-75 Azm- 70 N 0.27 12 290 P -1.77 9 198


15 01 41 11.22 22.257S 169.507E 25km5.5mb ( 17 obs.) 5.2Msz ( 19 abs.)LOYALTY ISLANDS REGIONCENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B. : 12S. 14CCen t ro i d Locot i on:Or igi n T ime 01:41:19.51.3Lot 22.19S FIX;Lon 169.48E FIXDep 15.0 FIX Half-duration 1.3Pr i nc i pa I Axes:

Scale 10..17 Nm T Vol- 2.66 Pig- 5 Azm-297 N -0.22 21 205 P -2.44 69 39

Best Double Coup Ie:Mo-2.5«10.* 17 NP1:Strike- 48 Dip-44 Slip- -60 NP2: 189 53 -116

15 01 55 38.80 7.230N 126.641E 31km 5.6mb ( 76 obs.) S.IMsz ( 35 abs.) MINDANAO, PHILIPPINE ISLANDS CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 3BS, 69C Cent ro i d Locoti on: Origin T ime 01:55:47.1 0.2 Lot 7.19N 0.03 Lan 127.12E 0.03 Dep 28.0 FIX Half-duration 1.9 Pr i nc i pa I Axes:

Scole 10**17 NmT Val- 5.62 Pig-64 Azm- 3N -0.72 24 207P -4.90 9 113

Best Double Coup Ie:Mo-5.3*10.* 17NP1:Strike-177 Dip-41 Slip- 52NP2: 42 59 118

15 03 09 38.19 16.673N 98.417W 20km 5.9mb ( 94 abs.) S.BMsz ( 15 obs.) NEAR COAST OF GUERRERO. MEXICO FAULT PLANE SOLUTION: P-Woves NP1 . Strike-115 Dip-77 Slip- 90 NP2: 295 13 90

P r i nc i pa I Axes:T Pig-58 Azm- 25 P 32 205

Comment: The focal mechanism is poorly controlled and corresponds to reverse faulting. The preferred fault pIane i s NP2.

RADIATED ENERGYNo. af sto: 6 Focal mech. M Energy 8.5±2.7«10««12 Nm

MOMENT TENSOR SOLUTION Dep 17 No. af sto: 13 Pr i nc i pa I Axes:

Scale 10«*18 NmT Vol- 1.17 Pig-48 Azm- 49N -0.05 21 294P -1.13 35 189

Best Double Coup Ie:Ma-1.1 10*«18NP1:Strike-224 Dip-22 Slip- 19NP2: 117 83 111

15 03 12 32.72 16 698N 98.395W 21km 6.1mb ( 70 obs.) 5.9Msz ( 32 obs.) NEAR COAST OF GUERRERO. MEXICO FAULT PLANE SOLUTION: P-Waves NP1:Strike-134 Dip-72 Slip- 90 NP2: 314 18 90

Pr i nc i pa I Axes T Pig-63 Azm- 44P 27 224

Comment: The focal mechanism ispoorly controlled andcorresponds to reversefaulting. The preferred faultpi ane i s NP2.

MOMENT TENSOR SOLUTION Dep 21 No. of sto. 13 P r i nc i pa I Axes:

Scale 10..18 Nm

T Vol- 1.58 Pig-64 Arm- 74 N 0.21 22 291 P -1.79 15 195

Best Double Couple:Mo-1 .7*10** 18 NP1:Strike-258 Dip-36 Slip- 51 NP2: 123 63 114

CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 27S, 59CCen t ro i d Locot i an:Origin Time 03:12:36.3 0.6Lot 16.45N 0.05 Lon 97.92* 0.04Dep 38.5 BDY Half-duration 2.5Pr i nc i poI Axes:

Scale 10**18 Nm T Val- 1.26 Pig-51 Arm- 72 N 0.31 30 297 P -1.56 23 194


15 05 23 39.56 28.073S 176.637W 33km 5.3mb ( 32 abs.) 5.3Msz ( 9 obs.) KERMADEC ISLANDS REGION CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B. 33S, 52C Centroid Location:Origin Time 05:23:42.1 0.3 Lot 28.03S 0.05 Lon 176.14* 0.05 Dep 15.0 BDY Half-duration 1.5 Pr i nc i poI Axes:

Scole 10*.17 NmT Vol- 2.97 Pig-60 Arm-291N 0.09 6 189P -3.05 29 96

Best Double Coup Ie:Mo-3.0*10«»17NP1:Strike-168 Dip-17 Slip- 68NP2: 11 74 97

15 15 34 47.43 31.882S 178.884W 47km5.2mb ( 13 obs.)KERMADEC ISLANDS REGIONCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 26S, 41CCen t ro i d Loco t i on:Origin Time 15:34:53.3 0.5Lot 31.51S 0.06 Lon 178.35W 0.04Dep 54.7 3.8 Half-duration 1.0Pr i nc i poI Axes:

Scole 10**16 NmT Vol- 6.39 Pig-71 Azm-317 N 1.25 12 188 P -7.64 14 95


15 20 39 19.99 54.7105 131.925W 10km 5.1mb ( 14 abs.) 5.5Msz ( 18 obs.) PACIFIC-ANTARCTIC RIDGE CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 34S, 66C Cent ro i d Locot i on:Origin Time 20:39:27.6 0.2 Lot 54.23S 0.03 Lon 132.04W 0.03 Dep 15.0 FIX Half-duration 2.0 Pr i nc i poI Axes:

Scole 10**17 NmT Vol- 4.09 Pig- 0 Azm-153N 0.24 90 180P -4.33 0 63

Best Double Coup Ie:Ma-4.2*10** 17NP1:Strike-198 Dip-90 Slip 180NP2: 288 90 0

15 21 52 25.34 51.374N 178.669W 32km 6.2mb (163 obs.) 6.6Msz ( 45 obs.) ANDREANOF ISLANDS, ALEUTIAN IS. FAULT PLANE SOLUTION: P-Woves NP1.Strike- 50 Dip-75 Slip- 90 NP2: 230 15 90


Comment: The focal mechanism is poorly controlled and corresponds to reverse faulting. The preferred fault pIane i s NP2.

PAGE 29 MAY 1993

RADIATED ENERGYNo. of sta: 27 Focal mech. F Energy 6 . 3±0.8*10** 13 Nm

MOMENT TENSOR SOLUTION Dep 25 No. of sta: 41 Pr i nc i poI Axes :

Scole ie»»19 Nm T Val- 1.98 Pig-50 Azm-32e N 0.03 14 68 P -2.61 36 169

Best Double Couple:Mo-2.0*10**19 NP1:Strike-311 Dip-16 Slip- 15* NP2: 66 83 75

CENTROID. MOMENT TENSOR (HRV) Dato Used: GDSNL P.B.: 465, *»C M.W.: 4*5. *«C Centroid Location: Origin Time 21:52:3*.8 6.1 Lat 51.16N 0.01 Lon 178 45W 6.61 Dep 25.5 6.* Half-duration 2.6 Pr i nc i poI Axes:

ScoIe 16««19 Nm T Val- 2.42 Pig-66 Azm-316 N 6.67 7 59 P -2.*9 28 154

Best Double CaupIe:Mo-2.5«16*«19 NP1:Strike-263 Dip-18 Slip- 115 NP2: 57 74 82

16 16 09 37.32 34.3255 168.941W 10km4.9mb ( 13 obs.)SOUTHERN EAST PACIFIC RISECENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.8.: 155. 24CCentroid Location:Origin Time 16.69:35.5 6.8Lat 35.475 6.08 Lon 169.42W 6.67Dep 15.6 FIX Half-durotion 2.6Pr i nc i pa I Axes:

Scale 10«»17 Nm T Vol- 1.21 Pig- 0 Azm-221 N 0.06 90 180 P -1.26 0 131

Best Double Cauple:Mo-1.2*10*«17 NP1:Strike-266 Dip-90 Slip 180 NP2: 356 90 0

16 16 24 44.56 2.097N 126.552E 44km5.2mb ( 37 obs.)NORTHERN MOLUCCA SEACENTROID, MOMENT TENSOR (HRV)Dota Used: GDSNL P B.: 215. 36CCen t ro i d Loca t i on:Or igi n T ime 16:24:49.8 0.6Lot 2.55N 0.05 Lon 126.70E 6.05Dep 26.0 3.1 Half-duration 2.0Pr i nc i pa I Axes:

Sea Ie 10**16 NmT Val- 10.15 Pig-83 Azm- 13 N 1.12 6 224 P -11.27 3 133

Best Double CaupIe:Mu-1.1 * 10** 1 7 NP1:Strike-217 Dip-42 Slip- 81 NP2: 49 49 98

16 21 44 48.94 15.2865 173.332W 21km6.1mb ( 77 obs.) 6.7Msz ( 56 obs.)TONGA ISLANDSFAULT PLANE SOLUTION: P-Waves NP1:Strike-280 Dip-75 Slip- 150 NP2: 18 61 17


Comment: The focal mechanism is poorly controlled and corresponds to strike-slip faulting with a moderate reverse component. The preferred fault plane is not de te rmi ned.

RADIATED ENERGYNo. of sto: 16 Focal mech. F Energy 1 .3±0.3*10** 14 Nm

MOMENT TENSOR SOLUTIONDep 10 No. of sta: 30Pr i nc i poI Axes:

ScoIe 10**18 NmT Vol- 8.17 Pig-45 Azm-234 N -0.09 40 87 P -8.08 17 342

Best Double Coup Ie:Mo-8.1 * 10** 18NP1:Strike- 29 Dip-45 Slip- 24NP2: 282 73 133

CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 455, **C M.W. 37S. 67C Cen t ro i d Locot i on:Or i gi n T ime 21 :44.58.9 0. 1 Lot 15.275 0.01 Lon 173.12W 0.01 Dep 31.7 0.4 Hoif-durotion 2.0 Pr i nc i pa I Axes:

Scole 10**18 NmT Vol- 9.12 Pig-50 Azm-172N -0.41 22 291P -8.71 31 36

Best Double CaupIe:Mo-8.9*10** 18NP1 :Str ike-174 Dip-25 Slip- 154NP2: 287 79 67

17 02 08 37.09 11.105N 124.846E 33km 5.5mb ( 54 obs.) 5.4Msz ( 19 abs.) LEYTE, PHILIPPINE ISLANDS CENTROID, MOMENT TENSOR (HRV) Dota Used: GDSN L.P.B.: 205. 32C Centroid Location:Origin Time 02:08:36.9 0.4 Lot 11 19N 0.05 Lon 124.36E 0.06 Dep 15.0 FIX Hoif-duration 2.0 Pr i nc i poI Axes:


Best Double Coup Ie.Mo-3.9*10** 17NP1 : Str i ke-128 Dip-55 Slip- -13NP2: 226 79 -145

17 06 06 12 92 54.981N 160.038W 33km5.5mb (125 obs.) 5.3Msz ( 40 obs.)ALASKA PENINSULACENTROID. MOMENT TENSOR (HRV)Doto Used- GDSNL.P.B.: 405. 73CCentroid Loco t i onOrigin Time 06 06:15.4 0.2Lot 54.61N 6 02 Lon 159 66W 0.03Dep 33.7 BDY Ho I f-durotion 1.7Pr i nc i poI Axes:

Scole 10*«17 NmT Val- 3 43 Pig-65 Azm-322 N 0.35 2 56 P -3.78 25 147

Best Double Couple Mo-3.6*10** 17 NP1:Strike-241 Dip-20 Slip- 95 NP2: 55 70 88

17 16 02 53.12 5.343S 151.985E 17km5.7mb ( 66 obs.) 6.3Msz ( 56 obs.)NEW BRITAIN REGION, P.N.G.FAULT PLANE SOLUTION: P-Waves NP1:Strike- 65 Dip-65 Slip- 65 NP2: 293 35 132

Pr i nc i poI Axes:T Pig-62 AZm-296 P 16 173

Comment: The focal mechanism is poorly controlled and corresponds to reverse faulting with a moderate strike-si ip componen t. The preferred fault plane is NP2.

RADIATED ENERGYNo. of sto: 12 Focal mech. F Energy 1.7±0.3*10* 12 Nm

MOMENT TENSOR SOLUTIONDep 16 No. of Sta: 26Pr i nc i pa I Axes:

Scale 10**18 NmT Val- 3.11 Pig-65 Azm-325 N -0.06 4 65 P -3.05 24 156

Best Double Coup Ie Ma-3.1 * 10** 18 NP1:Strike-256 Dip-21 Slip- 102 NP2: 63 69 85

CENTROID, MOMENT TENSOR (HRV)Dato Used: GDSNL.P.B.: 425. *»C M.W.: 315, 54CCent ra i d Loca t i on:Origin T ime 16:03:2.20.1Lot 5.455 0.01 Lan 152 26E 0.01Dep 23.4 0.4 Ha If-durotion 4 0Pr i nc i pa I Axes:

Scale 10**18 NmT Vol- 4.40 Pig-64 Azm-336N 0.18 1 68P -4 59 26 158

Best Double Couple:Mo-4.5*10*»18NP1:Strike-250 Dip-19 Slip- 92NP2: 68 71 89

17 23 20 49.22 37.171N 117.775W 7km 6.0mb (100 obs.) 6.0Msz ( 34 obs.) CALIFORNIA-NEVADA BORDER REGION FAULT PLANE SOLUTION: P-Waves NP1:Strike- 27 Dip-68 Slip- -43 NP2: 136 51 -151

Pr i nc i pa I Axes:T Plg-11 Azm- 85 P 45 344

Comment: The focal mechanism is moderately well controlled and corresponds to strike-slip faulting with o large normal component. The preferred fault plane is not determined.

RADIATED ENERGYNo. of sta: 10 Focal mech. F Energy 1 .8±0.5*10»* 13 Nm

MOMENT TENSOR SOLUTION Dep 8 No.ofsta:21 Pr i nc i pa I Axes:

Seale 10**18 Nm T Val- 1.61 Pig-10 Azm-116 N 0.00 19 210 P -1.61 69 1

Best Double CaupIe:Mo-1 .6»10** 18 NP1 :S t r i ke-185 Dip-39 Slip 121 NP2: 43 57 -67

CENTROID. MOMENT TENSOR (HRV) Data Used: GDSNL.P.B.: 305, 72C M.W.: 23S. 39C Cent ro i d Loca t i on: Origin Time 23:20:53.9 0.1 Lat 36.68N 0.02 Lan 118.10W 0.01 Dep 15.0 FIX Half-duration 2.6 Pr i nc i poI Axes:

Scale 10**18 Nm T Val- 2 02 Pig-15 Arm-122 N -0.38 1 213 P -1.64 75 308

Best Double Coup Ie:Mo-1.8*10*»18 NP1:Strike-210 Dip-30 Slip- -93 NP2: 33 60 -88

18 05 13 57.32 5.369S 152.370E 33km 4.9mb ( 17 abs.) 4.8Msz ( 15 obs.) NEW BRITAIN REGION. P.N.G. CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B. : 215. 30C Cen t ra i d Loco t i an: Origin Time 05:14: 4.5 1.0 Lot 4.93S 0.12 Lan 152.82E 0.13 Dep 15.0 FIX Half-duration 1.1 Pr i nc i pa I Axes:


Best Double Coup Ie:Mo-9.0*10**16NP1:Strike-210 Dip-18 Slip- 47NP2: 74 77 102

18 08 04 18.98 61.031N 149.953W 51km5.2mb (106 abs.)SOUTHERN ALASKACENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 30S. 49CCent ro i d Locot i an:Origin Time 08:04:23.6 0.2Lot 60.83N 0.05 Lon 149.87W 0.06Dep 67.3 3.2 Half-duration 1.0P r i nc i pa I Axes:

Scole 10**16 NmT Vol- 6.52 PIg- 4 Azm-102 N -1.06 22 10 P -5.46 67 202

Best Double Coup Ie:Mo-6.0*10**16 NP1:Strike-215 Dip-45 Slip- -58 NP2: 352 53 -118

18 10 19 33.78 19.914N 122.450E 169km 6 4mb (118 obs.) PHILIPPINE ISLANDS REGION

MAY 1993 PAGE 30

FAULT PLANE SOLUTION: P-Woves NP1 : St r i ke-200 Dip-53 Slip 152 NP2: 92 68 -40

P r i nc i poI Axes:T P I g- 9 Azm-149 P 44 50

Comment: The focol mechanism is moderately we I I control led and corresponds to strike-slip faulting with a large normal component. The preferred fault plane is not determined.

RADIATED ENERGYNo. of sta: 10 Focal mech. F Energy 1.6±0.3»10** 14 Nm

MOMENT TENSOR SOLUTIONDep 177 No. of sto: 20P r i nc i pa I Axes:

Seale 10«»19 Nm T Vol- 2.15 Pig-12 Azm-148 N -0.37 42 248 P -1.78 46 45

Best Double Coup Ie:Mo-2.0*10** 19 NP1 : Str i ke-198 Dip-49 Slip 152 NP2: 89 69 -44

CENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 43S. *»C M.W.: 39S, 94CCentroid Location:Origin Time 10:19:42.3 0.1Lot 19.97N 0.01 Lon 122.65E 0.01Dep 188.2 0.5 Half-duration 5.5Pr i nc i pa I Axes:

Sea Ie 10«*18 NmT Vol- 12.23 Pig- 8 Azm-140 N 0.78 34 235 P -13.01 55 38

Best Double Coup Ie:Mo-1 .3*10** 19 NP1 : St r i ke-197 Dip-47 Slip 140 NP2: 77 62 -51

19 12 03 28.37 8.347S 121.992E 40km5 8mb ( 50 obs.)FLORES REGION, INDONESIACENTROID, MOMENT TENSOR (HRV)Doto Used GDSNL P.B.: 36S, 71CCentroid Location:Origin Time 12:03:32.7 0.4Lot 8.25S 0.05 Lon 122.43E 0.05Dep 15.0 BDY Half-duration 1.4Principal Axes:

Seale 10» »1 7 NmT Vol- 3.61 Pig-54 Azm-261 N -0.75 29 39 P -2.87 20 140


20 04 55 54.45 13.757N 90.952W 31km 5.1mb ( 52 obs.) 5.3Msz ( 26 obs ) NEAR COAST OF GUATEMALA CENTROID. MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 45S, 90C Centroid Location:Origin Time 04:55:58.7 0.2 Lot 13.47N 0.02 Lon 91.41W 0.02 Dep 30.6 1.2 Half-duration 1 9 P r i nc i pa I Axes:

Sea Ie 10**17 NmT Vol- 4.99 Pig-70 Azm- 48N 0.38 10 289P -5.37 17 196

Best Double Coup Ie:Mo-5.2*10** 17NP1.Strike-271 Dip-29 Slip- 69NP2: 114 63 101

20 11 08 11.21 0.023S 124.793E 30km5.9mb ( 77 obs.)SOUTHERN MOLUCCA SEACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 45S, **CCen t ra i d Locat i on:Origin Time 11:08:18.3 0.2Lot 0.13S 0.02 Lon 125.29E 0.02Dep 49.2 1.6 Half-duration 1.7P r i nc i poI Axes:

Sea Ie 10* * 17 NmT Vol- 3.89 Pig-73 Azm-279 N 0.04 7 32

P -3.93 15 124Best Double Couple.Mo-3 9*10**17NP1 :Strike-224 Dip-30 Slip- 103NP2: 28 61 82

21 02 36 39.54 35.993N 139.694E 74km5.2mb (114 obs. )NEAR S. COAST OF HONSHU, JAPANCENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 21S, 29CCentroid Location:Origin Time 02:36:38.5 0.6Lot 35.93N 0.05 Lon 140.40E 0.10Dep 48.7 4.0 Half-duration 1.0Pr i nc i poI Axes:


Best Double Coup Ie:Mo-7.9»10** 16 NP1:Strike-270 Dip-28 Slip- 131 NP2: 45 69 71

21 06 12 11.87 51 897N 176.563W 61km5.3mb ( 82 obs . )ANDREANOF ISLANDS, ALEUTIAN IS.CENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 34S, 53CCentroid Location:Origin Time 06:12:14.4 0.3Lot 52.11N 0.05 Lon 176.81W 0.04Dep 70.9 3 8 Half-duration 1.0Pr i nc i poI Axes:

ScoIe 10* «16 NmT Vol- 8.35 Pig-12 Azm-252 N 5.08 50 357 P -13.43 37 153

Best Double Coup Ie.Mo-1.1 * 10** 17 NP1:Strike-299 Dip-55 Slip 160 NP2: 197 74 -37

22 04 58 12.30 3.856S 146.176E 94km5.1mb ( 8 obs.)BISMARCK SEACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 21S. 32CCen t ro i d Locot i on:Origin Time 04.58.10.0 0.5Lot 3.49S 0.07 Lon 145.51E 0.07Dep 15.0 FIX Ho I f-durotion 1.0P r i nc i poI Axes:



22 13 53 00.28 55.980S 27 . 477W 113km5.3mb ( 14 obs.)SOUTH SANDWICH ISLANDS REGIONCENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P B. : 2 IS, 38CCen t ro i d Locot i on:Origin Time 13:53: 4.0 0.4Lot 56 03S 0.04 Lon 27.51W 0.06Dep 105.8 2.8 Half-duration 1.2Pr i nc i poI Axes:

Scale 10**16 NmT Vol- 15 56 Pig-53 Azm-145 N -2.03 31 288 P -13.54 18 29

Best Double Coup Ie.Mo-1 .5*10** 17 NP1:Strike-157 Dip-38 Slip- 146 NP2: 275 69 57

23 01 44 39.68 9 087N 85 552W 33km 4 8mb ( 49 obs ) 4 7Msz ( 5 obs.) OFF COAST OF COSTA RICA CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L.P B.: 20S, 27C Cen t ro i d Locot i on:Origin Time 01 44:36.9 1.0 Lot 8.80N 0.12 Lon 85 26W 0.08 Dep 15.0 FIX Ho I f-duration 1.1 Pr i nc i poI Axes:

Scole 10*»16 Nm

T Vol- 8 33 Pig- 3 Azm-136N 5.55 47 43P -13.88 43 230

Best Double Coup Ie.Mo-1.1 * 10** 1 7NP1:Strike-264 Dip-58 Slip- -31NP2: 11 64 -144

23 06 59 54.16 16.171S 167.914E 178km5.4mb ( 53 obs.)VANUATU ISLANDSCENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 31S. 56CCentroid Location:Or igi n T ime 07:00: 1.00.3Lot 15.93S 0.04 Lon 167.78E 0.03Dep 181.0 1.2 Half-duration 1.7Principal Axes:

Scale 10»*17 NmT Val- 3.94 Pig-35 Azm-149 N -0.14 54 348 P -3.80 9 246

Best Double Coup Ie.Mo-3.9*10** 17 NP1:Strike-294 Dip-59 Slip- 20 NP2: 193 73 147

24 23 51 20.83 23.238S 66.631W 221km 6.2mb (121 obs.) JUJUY PROVINCE. ARGENTINA FAULT PLANE SOLUTION: P-Waves NP1:Strike-355 Dip-82 Slip- -90 NP2: 175 8 -90

Pr i nc i pa I Axes:T Pig-37 Azm- 85 P 53 265

Comment: The focal mechanism is poorly controlled and corresponds to normal faulting. The preferred fault pI one is NP1.

24 23 51 28.24 22.67 S 66.54 W 221km 6.6mb ( 15 obs.) JUJUY PROVINCE, ARGENTINA RADIATED ENERGYNo. of sto: 20 Focol mech. F Energy 5.2±0.7*10*»14 Nm


ScoIe 10»*19 NmT Vol- 3.56 Pig-17 Azm- 48N -0.57 40 152P -3.00 45 300

Best Double Coup Ie:Mo-3.3*10** 1 9NP1:Strike- 96 Dip-45 Slip 155NP2: 348 72 -48

CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B : 53S. **C M.W.: 51S, **C Centroid Location: Origin Time 23:51:28.7 0.1 Lot 23.45S 0.01 Lon 66.88W 0.01 Dep 231.9 0.5 Half-duration 7.7 Pr i nc i pa I Axes:


Best Double Coup Ie:Mo-3.3*10** 19NP1 : St r ike-165 Dip-15 Slip 101NP2: 356 75 -87

25 23 16 43.44 55.021N 1 60.513W 37km 6.2mb (150 obs.) 5.8Msr ( 45 obs.) ALASKA PENINSULA FAULT PLANE SOLUTION: P-Woves NP1:Strike- 70 Dip-70 Slip- 90 NP2: 250 20 90

Pr i nc i poI Axes:T Pig-65 Azm-340 P 25 160

Comment: The focal mechanism is poorly controlled and corresponds to reverse faulting. The preferred fault pI one i s NP2 .

RADIATED ENERGYNo. of sto: 32 Focal mech. M Energy 1.3±0.2*10*«13 Nm


PAGE 31 MAY 1993

Seale 10**18 Mm T Val- 1.66 Pig-65 Azm-306 N 8.48 13 65 P -2.13 21 161


CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 52S. **C M.W.: 32S. 44CCentroid Location:Origin T ime 23:16:48.1 0.1Lot 54.70N 0.01 Lon 160.04W 0.01Dep 48.9 BDY Ha If-durotion 2.7P r i nc i pa I Axes:


Best Double Coup Ie:Mo-1 .5*10** 18 NP1:Strike-247 Dip-23 Slip- 99 NP2: 57 67 86

26 03 30 51.71 5.522S 151.832E 38km 5.4mb ( 37 obs.) 5.2Msz ( 34 obs . ) NEW BRITAIN REGION. P N.G. CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L P B.: 43S, 75C Cen t r o i d Loco t i on:Origin Time 03:30:54.5 0.3 Lot 5 69S 0 03 Lon 152.18E 0.04 Dep 15.3 BDY Ho I f-durotion 1.7 Pr i nc i poI Axes:

Sea I e 10**17 NmT Vol- 3.44 Pig-58 Azm-335N -8 03 1 67P -3.41 32 157

Best Double Coup Ie:Mo-3.4*10** 17NP1 Strike-252 Dip-13 Slip- 95NP2 66 77 89

27 05 10 50.57 16.827S 173.856W 133km5 0mb ( 32 obs.)TONGA ISLANDSCENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL P B.: 26S. 31CCentroid Location:Origin Time 05:10:55.7 0.8Lot 16.61S 0.08 Lon 173.71W 0.07Dep 125.9 3.6 Ho I f-durotion 1.1Princ i poI Axes:

Scole 10**16 NmT Vol- 9.88 Pig-37 Azm-285 N -2.55 8 190 P -7.33 52 90

Best Double Coup Ie:Mo-8.6*10** 16 NP1:Strike- 54 Dip-11 Slip- -45 NP2: 189 82 -98

27 08 51 59.54 29.359S 178.271W 119km 5.9mb ( 62 obs.) KERMADEC ISLANDS, NEW ZEALAND FAULT PLANE SOLUTION: P-Woves NP1:Strike- 20 Dip-68 Slip- -35 NP2: 125 58 -154

Pr i nc i poI Axes:T Pig- 6 Azm- 74 P 40 339

Comment: The focol mechanism is poorly controlled ond corresponds to strike-slip faulting with o large normal component. The preferred fault plane is not determined.

RADIATED ENERGYNo. of sto: 6 Focol mech. F Energy 4.5±1 .6*10** 13 Nm

MOMENT TENSOR SOLUTION Dep 116 No. of sta: 20 Pr i nc i poI Axes:


Best Double Coup Ie:Mo-5.3*10** 17 NP1:Strike-169 Dip-24 Slip 121 NP2 22 70 -77

CENTROID, MOMENT TENSOR (HRV) Doto Used: GDSN L P B.: 46S. 95C Centroid Location:

Origin Time 08:52' 5.3 0.2Lat 29.39S 0.02 Lon 178 04W 0.02Dep 127.9 0.9 Half-duration 1.9Pr i nc i pa I Axes:

Sea Ie 10**17 NmT Val- 5.13 Pig-28 Azm-105N 0.19 14 203P -5.32 58 316

Best Double Coup Ie.Mo-5.2*10** 17NP1 :St r i ke-161 D i p-2 1- S I i p 1 33NP2: 27 75 -75

28 11 06 12.61 27.264S 66.474E 10km5.5mb ( 73 obs.) 5.1Msz ( 17 obs.)SOUTH INDIAN OCEANCENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 50S, **CCentroid Location:Or igin Time 11 :06:20.2 0.2Lot 27.53S 0.03 Lon 66.29E 0.04Dep 15.0 FIX Hoif-duration 1.6Pr i nc i poI Axes:

Scol e 10**17 NmT Vol- 3.42 Pig-27 Azm-348 N -0 16 2 257 P -3.26 63 162

Best Double Couple Mo-3.3*10**17 NP1:Strike- 84 Dip-18 Slip- -82 NP2: 256 72 -93

28 15 55 27.77 55.862N 155.171W 33km5.0mb ( 83 obs.) 5 0Msz ( 30 obs.)SOUTH OF ALASKACENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B . 34S, 61CCen t ro i d Loco t i on:Or ig in T ime 15:55:29.0 0.4Lat 55.39N 0.06 Lon 154.93W 0.07Dep 15.0 BDY Hoif-durotion 1.4Pr i nc i poI Axes:

ScoIe 10**17 Nm T Vol- 2.14 Pig-52 Azm-312 N 0.13 6 50 P -2.27 38 145

Best Double Coup Ie:Mo-2.2*10** 17 NP1 :Strike-272 Dip-10 Slip- 132 NP2: 49 83 84

29 00 18 34.91 18.378S 174.922W 195km5.0mb ( 40 obs.)TONGA ISLANDSCENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 37S, 61CCent ro i d Loca t i on:Origin Time 00:18:39.6 0.4Lot 18.50S 0.03 Lon 174.81W 0.04Dep 210.8 1.2 Half-duration 1.3Pr i nc i poI Axes:

Scale 10**17 NmT Val- 1.84 Pig- 6 Azm-347 N -0.38 47 84 P -1 . 46 42 251

Best Double Coup Ie:Mo-1 .6*10**17 NP1:Strike- 38 Dip-56 Slip 151 NP2: 291 66 -37

29 06 50 13.42 19.072N 26.476W 12km 5.9mb (150 obs.) 6.2Msz ( 59 obs.) NORTH ATLANTIC OCEAN FAULT PLANE SOLUTION: P-Woves NP1:Strike- 55 Dip-82 Slip 180 NP2: 145 90 -352

P r i nc i pa I Axes:T PIg- 6 Azm- 10 P 6 280

Comment: The focol mechanism is we I I con t roI Ied ond corresponds to left loterol strike-slip faulting with o smoI I nor mo I componen t. The preferred fault plone is NP1.

RADIATED ENERGYNo. of sta: 17 Focol mech. F Energy 5.7±1 . 1 * 10** 14 Nm


Scole 10**18 NmT Vol- 4.12 Pig- 6 Azm- 6 N 0.23 78 127

P -4.36 10 274Best Double Coup Ie:Mo-4.2*10**18NP1:Strike- 50 Dip-78 Slip 177NP2: 320 87 -12

CENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 53S, **C M.W.: 43S. 81C Centroid Location: Origin Time 06:50:18.9 0.1 Lot 19.16N 0.01 Lon 26.43W 0.01 Dep 15.0 FIX Half-duration 3.5 Pr i nc i poI Axes:

Scale 10**18 Nm T Val- 3.42 Pig-12 Azm- 15 N 0.37 69 138 P -3.80 17 281

Best Double Coup Ie:Mo-3.6*10**18 NP1:Strike- 59 Dip-69 Slip--176 NP2: 327 86 -21

29 14 44 24.14 4.663S 153.168E 59km5.3mb ( 32 abs.)NEW IRELAND REGION, P.N.G.CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 35S. 46CCent ro i d Locot i on:Origin Time 14:44:26.0 0.5Lot 4.71S 0.04 Lon 153.13E 0.05Dep 54.4 4.2 Half-duration 1.0Pr i nc i pa I Axes:

Sco le 10**16 Nm T Vol- 9.05 Pig-59 Azm-326 N -1.66 8 69 P -7.39 30 163


30 14 12 20.05 3.674S 142.703E 6km 5 9mb ( 61 obs.) 5.6Msz ( 42 obs.) NEAR N COAST OF NEW GUINEA, PNG. FAULT PLANE SOLUTION: P-Woves NP1:Strike-278 Dip-81 Slip- 32 NP2: 182 58 169


Comment: The focal mechanism is poorly controlled and corresponds to strike-slip faulting with o large reverse component. The preferred fault plane is not determined.

RADIATED ENERGYNo. of sta: 14 Focal mech. M Energy 1.1±0.2*10**13 Nm

MOMENT TENSOR SOLUTION Dep 19 No. of sto: 21 Pr i nc i pa I Axes:



CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 44S. 94C Centroid Location:Origin Time 14:12:30.8 0.2 Lot 3.50S 0.02 Lon 142.81E 0.02 Dep 40.9 BDY Half-duration 1.9 Pr i nc i pa I Axes:

Scale 10**17 NmT Vol- 5.71 Pig- 5 Azm-289N -0.13 43 194P -5.58 46 23

Best Double Coup Ie:Mo-5.6*10** 17NP1:Strike- 55 Dip-56 Slip- -34NP2: 165 63 -141

30 14 44 18.64 17.600S 173.326W 33km 5.0mb ( 25 obs.) 5.5Msz ( 2 obs.) TONGA ISLANDSCENTROID. MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 14S. 22C Centroid Location:Origin T ime 14:44:21.7 3.0 Lot 17.97S 0.13 Lon 173.15W 0.23 Dep 16.7 7.2 Half-duration 1.3

MAY 1993 PAGE 32

Pr i nc i pa I Axes: Sea I e 10**17 NmT Val- 1.47 Pig-57 Azm-284N -0.02 1 15P -1.45 33 106

Best Double Coup Ie:Mo-1 .5*10** 17NP1:Strike-199 Dip-12 Slip- 94NP2: 15 78 89

30 16 32 27.45 5.423S 150.514E 102km 5.7mb ( 46 abs.) NEW BRITAIN REGION. P N.G. FAULT PLANE SOLUTION P-Waves NP1:Strike- 65 Dip-55 Slip- -90 NP2: 245 35 -90


Comment: The focal mechanism is poorly controlled and corresponds to normal faulting. The preferred fault plane is nat determined.

RADIATED ENERGYNa. af sta: 6 Facal mech. M Energy 3.4±0.5*10** 12 Nm

MOMENT TENSOR SOLUTION Dep 104 Na. of sta: 11 Pr i nc i pa I Axes:

Scale 10**17 NmT Val- 3.63 Pig- 8 Azm-157 N 0.07 14 65 P -3.70 74 274

Best Double Coup Ie:Mo-3.7*10** 17 NP1:Strike-262 Dip-39 Slip- -68 NP2 54 54 -107

CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L P.B : 42S. 76C Centroid Location:Origin Time 16:32:32.4 0 2Lot 5.52S 0.03 Lan 150.72E 0.03Dep 109.8 1 9 Half-duration 1.5P r i nc i poI Axes:

Sco I e 10* 17 NmT Vol- 2.55 Pig-28 Azm-161N -0.16 19 61P -2.39 55 302

Best Double Couple.Ma-2.5*10»* 17NP1:Strike-290 Dip-24 Slip- -38NP2: 56 76 -109

30 17 08 53.95 1.546N 127.207E 81km 6.0mb ( 86 abs . ) HALMAHERA, INDONESIA FAULT PLANE SOLUTION: P-Waves NP1:Strike-225 Dip-80 Slip- 90 NP2 45 10 90

Princ i pa I Axes:T Pig-55 Azm-135 P 35 315

Comment: The focal mechanism is poorly controlled and corresponds to reverse faulting. The preferred fault pI one i S NP2.

RADIATED ENERGYNa. af sta: 16 Facal mech. F Energy 2.4±0.5*10** 13 Nm

MOMENT TENSOR SOLUTION Dep 78 Na. af sta: 18 Pr i nc i pa I Axes:

Seale 10**18 NmT Val- 1.54 Pig-52 Azm-139 N 0.05 2 46 P -1.59 38 314

Best Double Coup Ie:Ma-1 .6*10** 18 NP1:Strike- 30 Dip- 7 Slip- 73 NP2: 226 83 92

CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 45S, **C Centroid Location: Origin Time 17:09- 1.4 0.1 Lot 1.56N 0.01 Lon 127 25E 0.02 Dep 112.9 1.1 Half-duration 2.8 Pr i nc i pa I Axes:


Best Double Couple:Mo-1 7*10**18NP1:Strike-320 Dip-18 Slip- 9NP2: 222 87 108

30 22 34 03.89 0.621S 124.208E 75km 5.6mb ( 53 obs ) SOUTHERN MOLUCCA SEA CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 45S. 86C Cen t roid Loc o t i on Or i gin T ime 22 34. 5.70.2

Lot 0.92S 0.03 Lan 124.50E 0.03Dep 36 3 2.3 Half-duration 1.8Pr i nc i pa I Axes:

Sea Ie 10**17 Nm T Val- 4.89 Pig-52 Azm-355 N -1.29 6 92 P -3.60 37 186

Best Double Coup Ie:Ma-4.2*10** 17 NP1:Strike-309 Dip-10 Slip- 127 NP2 : 91 82 84

31 08 34 22.01 72.448S 174.838E 10km5.3mb ( 23 abs.) 5.1Msz ( 23 abs.)ROSS SEACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 28S. 43CCen t ro i d Loca t i on:Origin Time 08:34:28.3 0.3Lot 72.12S 0.04 Lon 175.04E 0.16Dep 15.0 FIX Half-duration 1.2P r i nc i pa I Axes'


Best Double Coup Ie:Ma-2.2*10 * * 17 NP1 :Str i ke-233 Dip-35 Slip 156 NP2: 123 77 -57

31 21 15 02.54 29.390S 176.373W 68km5.1mb ( 21 obs.)KERMADEC ISLANDS REGIONCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 15S. 20CCen t ro i d Loca t i onOrigin Time 21:14:57.0 0.8Lot 29.34S 0.09 Lon 175.48W 0.08Dep 15.0 FIX Half-duration 1.0Pr i nc i pa I Axes


Best Double Couple Mo-4.5*10** 16 NP1 : St r i ke-335 Dip-45 Slip 129 NP2: 204 57 -57

Compiled by Pingsheng Chang, Willis S. Jacobs, Stuart K koyonagi. Christina K. Lavonne, John H. Minsch, Russell E. Needham, Waverly J. Person. Bruce W. Presgrave and William H. Schmieder.

PAGE 33

02 May 1993 11:26:54.87 South Sandwich Islands Region

HRVPdiff

BDF (MHZ)P xl '

RSNY (LHZ)Pdiff x38

ZOBO (LHZ)P x3 v '

CEH (LHZ)Pdiff x20

(LHZ)

M and B

TBT (LHZ)P x4 V X

PAB (BHZ)5

SSE (LHZ)PKPbcV4 '

-_VlMA/W" JAU (LHZ)

SPA (LHZ)P x6 V X

SNZO (LHZ)P x3 X

0 1 2Time (min)

IS

01234Time (min)

06 May 1993 13:03:18.11 Western Brazil

ZOBO (LHZ)P xl v '

CCM (LHZ)P x!3

RSSD (LHZ)P x!6 V '

ANMO (LHZ)P xl4 '

TUC

ISA (LHZ)P x!2

SBC (BHZ)P x2

CMB (LHZ)p xii v '

TATOPKPdf x

M and B01234

Time (min)

HRV (LHZ) p '

BJI (LHZ)PKPdf x9

KMI (BHZ)PKPdf \5

TBT (LHZ)P x36

PAB (BHZ)* "4

GRFO (LHZ)P x33 7

LSA (LHZ)PKPdfx22 '

LBTB (LHZ)Pdiff x2d

CHTO (LHZ)PKPdf xf9 7

QIZ (LHZ)PKPdf x 14

SPA (LHZ)P x36

15

01234

Time (min)

PAGE 34

11 May 1993 18:26:51.32 Mindanao, Philippine Islands

MDJ (BHZ)P x4 V '

KONO (LHZ)Pdiff x!7

XAN (LHZ)P x4

WMQ (LHZ)P x4

QIZ (LHZ)Pxl

CHTO (LHZ)P x4 V

TBT (LHZ)PKPdf x 142

ANTO (LHZ)P x9 '

LBTBPdiff

ZOBO (BHZ)PKPdf x9v

M and B01234

Time (min)

SPA (LHZ)Pdiff x37

200

o

MAJO (LHZ)P x4 V '

HRV (LHZ) Pdiff xioe '

GOL (LHZ)Pdiff x44

COR (LHZ)Pdiff x20 '

GSC (LHZ)Pdiff x31

KIP (LHZ)P x9

RAR (LHZ)P xlO

SNZO (BHZ)P xB '

TAU (LHZ)P x6

Time (min)

13 May 1993 11:59:49.25 Alaska Peninsula

ANTO (LHZ)P x4 '

WMQ (BHZ)

HIA (LHZ)P x2 V '

CHTO (LHZ)P x4 V '

SSE (LHZ)P x2 V

MAJO (LHZ)P x3

QIZ (LHZ)Fx2

RAR (LHZ)P x9 V '

ra (LHZ)M and B

0 1 2

Time (min)

KONO (LHZ)P x3 V '

PAB (BHZ)P x4

TBT (LHZ)p x? v '

CBM (BHZ)P x4 V '

HRV (LHZ)P x5 V '

CCM (LHZ)P x7

MIAR (BHZ)

COR (LHZ)P x4 V '

-A/WW CMB (LHZ)P x6 V '

ZOBO (LHZ)Pdiff x3r

90

01234Time (min)

PAGE 35

15 May 1993 03:12:32.72 Near Coast of Guerrero, Mexico

GOL (BHZ)P x2 V '

ANMO (LHZ)P x2

TUC (LHZ)P x3 V '

ISA (LHZ)P x? V '

CMB (LHZ)P x9 V '

PAS (LHZ)P x3 V '

RPV (LHZ)P x4

SBC (LHZ)P x3

COR (LHZ)P x!2 V

LON (LHZ)P xlO

25 and B

RSSD (LHZ)P x6

CCM (LHZ)P x2

A AWA^-*.

COL (BHZ) p xio

25-

3. o-

GOGA (LHZ)P xl V '

CEH (LHZ)P x2 V '

HRV (BHZ)P x5 V '

CBM (LHZ)P x4 V '

TBT (LHZ)P x9 V '

PAB (BHZ)P x6 V '

KONO (LHZ)P xll '

0 1 Z

Time (min)01334

Time (min)

15 May 1993 21:52:25.34 Andreanof Islands, Aleutian Is.

KEY (LHZ)P x2 '

ANTO (LHZ)P x4

WMQ (LHZ)

LSA (LHZ)P x2 '

HIA (LHZ)P x2

MDJ (BHZ)P x2

SSE (BHZ)P x2 V

MAJO (LHZ)P x3 V '

CHTO (BHZ)P x2

GUMO (LHZ)

M and Bo"1 ' ' ' T""1 ' ' ""3

Time (min)

CTAO (LHZ) p xs y45

TBT (LHZ)Pdiff x!6

COL (LHZ)P xl

HRV (LHZ)P x7 V '

(BHZ)

CMB (LHZ)P x6 V '

BOSA (LHZ)PKPdf xZO

KIP (LHZ)P x4

RAR (LHZ)P x8 V '

SNZO (LHZ)

01334

Time (min)

PAGE 36

16 May 1993 21:44:48.94 Tonga Islands

COL (LHZ)P x6 V '

XAN (BHZ)P x4

SSE (LHZ)P xlO

GUMO (LHZ)

LSA (LHZ)Fdiff x31 '

KMI (BHZ)P x6

CHTO (LHZ)P xlO

NWAO (BHZ)P x2

0 1 2

Time (min)

(LHZ)

COR (LHZ)

CMB (LHZ)

(LHZ)

01234

Time (min)

17 May 1993 16:02:53.12 New Britain Region, P.N.G.

MAJO (LHZ)

HIA (LHZ)

SSE (LHZ)P x2

ENH (LHZ)P x2 '

QIZ (BHZ)Px2

KMI (LHZ)P x2 V '

CHTO (LHZ)

LSA (BHZ)P x3

NWAO (LHZ)

M and B

o i 2 Time (min)

TBT (LHZ)PKPdf x8

COR (LHZ)P x6 '

RSSDjfLHZ)Pdiff x22 7

CCM (LHZ)Pdiff x29 X

KIP (LHZ)P x4 V '

RPV (LHZ)P x6 V 7

ANMO (BHZ)Pdiff xlO

RAR (LHZ)Px4 V '

SNZO (LHZ) p x3 v '

SPA (LHZ)P xlO

CTAO (LHZ) p xi v 7

15

01234

Time (mm)

PAGE 37

17 May 1993 23:20:49.22 California-Nevada Border Region

ARU (BHZ)P xl!2v

rw* II JU/W -w*\Ax\r%/V KEY (LHZ)

P ^83

COR (LHZ)Pn x7 '

HIA (BHZ)P x!27

CMB (LHZ)Pn xl v '

MAJO (LHZ)P x253

SSE (LHZ)P x704

KIP (LHZ)P x217

0 1 2Time (min)

KONO (LHZ)P x335

PAB (LHZ)P x341 '

RSSD (LHZ)Pn x79

CBM (LHZ)P x83

XAN (BHZ)Pdiff x337

CCM (LHZ)P x34

01334

Time (min)

18 May 1993 10:19:33.78 Philippine Islands Region

HIA (LHZ)P x3 '

KONO (LHZ)P x!3

XAN (LHZ)P xl V '

ENH (LHZ)P x2

KMI (LHZ)P x2 V '

QIZ (LHZ)Fxl v '

OBN (BHZ)P x5 V X

ANTO (LHZ)P xl5

BOSA (LHZ)Pdiff x857 '

M and B0 1 ' ' ' ' 2

Time (min)

HRV (LHZ)Pdiff xli6

PAB (LHZ)Pdiff x58

COL (LHZ)P x8 V '

MAJO (LHZ)p xi v '^_ COR (BHZ)

P x4

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(BHZ)

90a.

001334

Time (min)

PAGE 38

24 May 1993 23:51:28.24 Jujuy Province, Argentina

CCM (LHZ)P x2

ANMO (LHZ) _J\/\A/\/W/V

PFO (LHZ)P xl

LON (LHZ)P x2

COR (BHZ)P xl

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30-M and B

,1 ..........o i z

Time (min)

RSNY (LHZ)P x3

SPA (LHZ)P x3

CBM (BHZ)P x2

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TBT (LHZ)P x2 '

LZH (BHZ) PKPdf x2 '

ENH (BHZ)PKPdf x2

CHTO (LHZ)PKPdf x2

BOSA (LHZ)P x2

GUMO (LHZ)PKPdf xl x

30-

=t 0-

0 1 Z 3 4

Time (min)

25 May 1993 23:16:43.44 Alaska Peninsula

KEY (BHZ)P x2

ANTO (LHZ)P x?

BOSA (LHZ)PKPdf xf4

HIA (LHZ)P x3

LSA (LHZ)P x4 V '

MDJ (BHZ)P x2

TATO (BHZ)P x2

CHTO (LHZ)P x7

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CMB (LHZ) p x? v '

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0 1 Z 3Time (min)

PAGE 39

29 May 1993 06:50:13.42 North Atlantic Ocean

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CBM (BHZ)P x48 V '

HRV (LHZ)P x95

RSSD (LHZ)P xl78

(LHZ)

ANMO (LHZ)P xlll

ISA (LHZ)P xl55

ZOBO (LHZ)P x46 V '

BDF (LHZ)P x31

M and B

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USC (LHZ)P x!23

0 l Z Time (min)

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90 -i

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PAB (LHZ)P x!5 V '

OBN (BHZ)P x!6

HIA (LHZ)Pdiff X380

(LHZ)94

1834

Time (min)

30 May 1993 14:12:20.05 Near N Coast of New Guinea, Png,

MAJO (LHZ)P x4 '

MDJ (LHZ)P x5 V

HIA (LHZ)P x5

TATO (LHZ)P x4

XAN (BHZ)P x2

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CHANGE OF ADDRESS FORM

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U.S. DEPARTMENT OF THE INTERIOR/GEOLOGICAL SURVEYNational Earthquake Information Center

JUNEK DAY

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CONTRIBUTED MAGNITUDES AND COMMENTS

. MD 3.0

ML 3.3 (ZAG)

ML 3.1 (AEIC). 3.2

CALIF.-BAJA CALIF. BORDER REGION. <PAS-P>. ML 3.5(PAS). Mult iple event.NEAR S. COAST OF HONSHU, JAPANCALIF.-BAJA CALIF. BORDER REGION. MD 3.0 (GS).NORTHERN ITALY. ML 2.5 (GEN). 2.1 (LDG).NORTHERN ITALY. ML 1.7 (GEN).NORTHWESTERN BALKAN REGION. MD 2.6 (LJU).GREECE-ALBANIA BORDER REGION. ML 2.9 (THE)(ATH).NEAR COAST OF VENEZUELA. MD 3.1 (TRN).FRANCE. ML 2.4 (LDG).SOUTH OF FIJI ISLANDSNORTHWESTERN BALKAN REGION. MD 3.5 (TRI).3 1 (TTG).KENAI PENINSULA, ALASKA. <AEIC>(PMR).BANDA SEATIMOR SEAPYRENEES. Felt (I) in the Aspe Valley. France.NEAR EAST COAST OF HONSHU, JAPAN. Mw 5.0 (HRV).GREECEGREECE. ML 1 .5 (THE) .OFF COAST OF CENTRAL CHILEOFF EAST COAST OF HONSHU, JAPANCRETE. MD 4.6 (ATH).CENTRAL CALIFORNIA. <PAS-P>. ML 2.9 (PAS).TURKEY ML 2.5 ( ISK) . KODIAK ISLAND REGION. ML 3.6 (AEIC).KODIAK ISLAND REGION. ML 3.4 (AEIC).NEAR COAST OF CENTRAL CHILE. MD 3.1 (SAN).TURKEY. ML 2.8 (ISK).TURKEY ML 3.6 (ISK).NORTHERN ITALY. ML 2.4 (GEN).GREECE. ML 2.4 (GEN).NORTHERN ITALY. ML 1.8 (GEN).TURKEY. ML 2.9 (ISK).SOUTH OF ALASKA. ML 3.1 (AEIC).LOYALTY ISLANDS REGIONCALIFORNIA-NEVADA BORDER REGIONTURKEY. ML 2.9 (ISK).CHILE-BOLIVIA BORDER REGIONREPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE)CALIF.-BAJA CALIF. BORDER REGION.FRANCEREPUBLIC OF SOUTH AFRICA. ML 2.6 (PRE).NORTHERN COLOMBIAOFF COAST OF SOUTHERN CHILE. Mw 5.9 (HRV)FRANCE. ML 2. 1 (STR) .DODECANESE ISLANDS. MD 4 2 (HLW)TURKEY. ML 2.8 (ISK).TURKEY. ML 2.8 (ISK).SOUTHERN NORWAY. MD 1.9 (BER).NORTHWESTERN BALKAN REGION MD 2.5 (LJU)CORSICA. ML 2.1 (GEN), 1.9 (LDG).OFF COAST OF NORTHERN CALIFORNIACENTRAL ALASKA. <AEIC>.NORTHWESTERN BALKAN REGION ML 5

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Annual Subscriptions: Superintendent of Documents, U S. Government Printing Office. Washington, D C. 20402. Back issues: Books and Open-File Reports Section, U.S. Geological Survey, Box 25425, Denver, CO 80225.

JUN 1993 PAGE

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Some domoge (VII; in the Ludbreg oreo, Crootio Alsofelt widely in southern Steirmork, AustrioREPUBLIC OF SOUTH AFRICA. ML 4.3 (PRE). mbLq 3.8 (BUL)WYOMING. ML 3.8 (GS). Felt (Ml) ot Boiroil.OFF COAST OF NORTHERN CALIFORNIASTRAIT OF GIBRALTAR. mbLq 3.1 (MDD). Felt (III) in theBerkone oreo, Morocco.CALIF.-BAJA CALIF. BORDER REGION. <PAS-P>. ML 3 3(PAS).KURIL ISLANDSSTRAIT OF GIBRALTAR. MG 3.0 (RTC).GULF OF CALIFORNIASAN JUAN PROVINCE, ARGENTINAPRINCE EDWARD ISLANDS REGION.GREECE-ALBANIA BORDER REGIONMD 3.0 (ATH).REPUBLIC OF SOUTH AFRICA. ML 2.5 (PRE)TURKEY ML 2.7 (ISK).REPUBLIC OF SOUTH AFRICA. MLSOUTHERN GREECE. ML 3.0 (THE)KERMADEC ISLANDS REGIONNORTHWESTERN BALKAN REGION. ML 2 2 (SKO), 2.1 (THE).GREECENEAR COAST OF NICARAGUA. Felt ot Monoquo ond in Leonond Chinondeqo Deportments.WINDWARD ISLANDS. MD 3.2 (TRN).ANDREANOF ISLANDS, ALEUTIAN IS. Mw 5 8 (HRV)(PMR). Ms 5.3 (BRK). Felt (Ml) on AdokBISMARCK SEATURKEY. ML 2.8 ( I SK).AEGEAN SEA. ML 2.0 (THE).TURKEY. ML 4.3 (ATH), 3.8 ( I SK). Feltreq i on.NORTHWESTERN BALKAN REGION. NEAR COAST OF CENTRAL CHILE NORTHWESTERN BALKAN REGION.Podcetrtek, Slovenio.REPUBLIC OF SOUTH AFRICA. ML 2 1 (PRE)BULGARI A. ML 3 0 (THE) .VANUATU ISLANDSCALIFORNIA-NEVADA BORDER REGION.BANDA SEAREPUBLIC OF SOUTH AFRICA. ML 3.1 (PRE).TURKEYSOUTHERN ALASKA <AEIC> ML 2 5 (AEIC).REPUBLIC OF SOUTH AFRICA. ML 2 6 (PRE).AEGEAN SEA ML 2 5 (THE)SAN JUAN PROVINCE. ARGENTINAWESTERN IRANREPUBLIC OF SOUTH AFRICA. ML 2 2 (PRE).BANDA SEANORTHWESTERN BALKAN REGION. ML 2.3 (ZAG), 2.3 (VIE)Felt ot Ludbreg, Crootio.GREECE. ML 2.0 (THE).NEAR S COAST OF HONSHU, JAPANNORTHWESTERN BALKAN REGION. ML 2.8 (ZAG)2.9 (LJU), 2.6 (TRl). Felt at Ludbreg, Crootio.SAN JUAN PROVINCE, ARGENTINASICILr MD 2.8 (ROM).NEAR COAST OF GUERRERO, MEXICOOFF E COAST OF N ISLAND, N.Z. Felt ot Lower Hutt.WASHINGTON-OREGON BORDER REGION. <SEA-P>. MD 2.8 (SEA),2 8 (GS). Felt (Ml) ot Mount Angel ond Scotts Mills;(II) ot Mo IoI Io, Oreqon. Also felt in the southern portof Portland, Oregon.EASTERN ARABIAN PENINSULA. MD 4.8 (RYD). Felt stronglyi n Kuwo i t .SUMBAWA REGION, INDONESIA SOUTHERN CALIFORNIA. <PAS-P>.Son Fernando VoI ley.HOKKAIDO, JAPAN REGIONGREECE-ALBANIA BORDER REGION.NORTHWESTERN BALKAN REGION. Felt ot Ludbreg,MYANMAR-CHINA BORDER REGIONSOUTHERN MOLUCCA SEAPOLANDCALIFORNIA-NEVADA BORDER REGIONNEAR COAST OF GUERRERO, MEXICOSAN JUAN PROVINCE. ARGENTINASOUTH OF AUSTRALIAREPUBLIC OF SOUTH AFRICA. MLOFF EAST COAST OF KAMCHATKA.Petropovlovs k Komcho t s k i ySAN JUAN PROVINCE, ARGENTINANEW BRITAIN REGION, P.N.G.OAXACA, MEXICOPYRENEES. ML 1.1 (STR).OFF COAST OF OREGONTURKEY. ML 4.1 (ISK). FeIt inHOKKAIDO, JAPAN REGIONGREECE-BULGARIA BORDER REGIONGREECEVANUATU ISLANDS Mw 6.1 (HRV).

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3.9 (PRE) . Felt (III) ot

the Somsun oreo.

PAGE JUN 1993

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STRAIT OF GIBRALTAR mbLg 2 6 (MOD) CENTRAL CALIFORNIA. <PAS-P> ML 2 8 (PAS) STRAIT OF GIBRALTAR mbLg 2 7 (MOD). STRAIT OF GIBRALTAR mbLg 2 6 (MOD) SANTA CRUZ ISLANDSFRANCE. ML 3 5 (LOG) mbLg 3 3 (MOD). SAN JUAN PROVINCE, ARGENTINA NEAR EAST COAST OF HONSHU, JAPAN STRAIT OF GIBRALTAR. mbLg 2 6 (MOD).FIJI ISLANDS REG IONSOUTH OF PANAMAREPUBLIC OF SOUTH AFRICATURKEY ML 3 0 ( ISK) .SAMOA ISLANDS REGIONTURKEY. ML 2.7 (ISK).LEEWARD ISLANDS. ML 4.3 (FDF).STRAIT OF GIBRALTAR. mbLg 2 8 (MOD).TURKEY. ML 3 2 (ISK), 2.9 (THE).NORTHERN CHILEREPUBLIC OF SOUTH AFRICA ML 3 2 (PRE). mbLg 3.1 (MOD).MINDANAO, PHILIPPINE ISLANDSSOUTH OF TONGA ISLANDS. Mw 5.1 (HRV).KENAI PENINSULA, ALASKA. <AEIC> ML 2.5 (AEIC).REPUBLIC OF SOUTH AFRICA. ML 2 8 (PRE).FRANCE. ML 2.2 (LOG).GREECE. ML 1.8 (THE).SOUTHERN ALASKA. <AEIC>STRAIT OF GIBRALTAR. mbLg 2.2 (MOD).SOUTH OF TONGA ISLANDS. Mw 5.5 (HRV). Ms 5.1 (BRK).BONIN ISLANDS REGIONNEAR EAST COAST OF HONSHU, JAPANSPA IN. mbLg 2.7 (MOD).STRAIT OF GIBRALTAR. mbLg 2.7 (MDD).SAN JUAN PROVINCE, ARGENTINAAFGHANISTAN-TAJIKISTAN BORD REG.FOX ISLANDS, ALEUTIAN ISLANDSVENEZUELA. Felt in the Merido-Truji I Io-Borinos-Corocosoreo.TURKEY ML 2 7 ( ISK) .SOUTHERN ALASKA. <AEIC>.SWEDEN MD 3 1 (BER)SOUTH OF FIJI ISLANDSMARIANA ISLANDS Mw 6 5 (GS). 6 4 (HRV)Mo-9. 1 »10»»18 Nm (PPT)broodbond displocement seismogroms.FRANCE ML 2 3 (LOG), 2.0 (STR).KERMADEC ISLANDS REGIONTURKEY. ML 3 0 (ISK)NORTHWESTERN BALKAN REGION. ML 2.1 (THE)AEGEAN SEA. ML 2 6 (THE).TURKEY. ML 3.4 (ISK).CENTRAL CALIFORNIA. <GM-P>. MD 2.4 (GM).Felt in the Ook I ond-P i eclmon t-A I omedo oreo.NORTHERN SUMATERA. INDONESIATURKEY. ML 2.6 (ISK)NEAR SOUTH COAST OF FRANCE. ML 2.2 (LOG).TURKEY. ML 4.3 (THE), 4.2 (ATH), 4 0 (ISK)Bolikesir oreo ond os for cost os Erne t.TURKEY. ML 2.9 (ISK).FRANCE. ML 2 2 (GEN).SAN JUAN PROVINCE. ARGENTINASANTA CRUZ ISLANDS REGIONNORTH ATLANTIC OCEAN. MD 3.5 (RBA)TURKEY. ML 3.0 (ISK).GREECE-ALBANIA BORDER REGION.CHILE-ARGENTINA BORDER REGION. MD 3.9 (SAN).SAN JUAN PROVINCE, ARGENTINANORTHWESTERN BALKAN REGION. ML 2.9 (THE), 2.6 (SKO).CENTRAL CHILE. MD 3.8 (SAN).SOUTH OF MARIANA ISLANDSSAN JUAN PROVINCE. ARGENTINAAEGEAN SEA. ML 2.6 (THE).NORTH ISLAND, NEW ZEALANDNORTHWESTERN BALKAN REGION.STRAIT OF GIBRALTAR. mbLg 2.5HALMAHERA, INDONESIASOUTHERN ALASKA. <AEIC>.REPUBLIC OF SOUTH AFRICASOUTHERN NORWAY. MD 2.4 (BER).EAST OF KURIL ISLANDSNEAR COAST OF CENTRAL CHILE MD 3 9 (SAN)VANUATU ISLANDSNORTHERN MOLUCCA SEA CALIFORNIA-NEVADA BORDER REGIONML 3.3 (BRK ) .NORTHERN SUMATERA, INDONESIATURKEY. ML 3.0 (ISK).SAN JUAN PROVINCE, ARGENTINAARMENIA-AZERBAIJAN-IRAN BORD REGPYRENEES. ML 3.6 (LDG) mbLg 3.2 (MDD). Felt in theLocq Oilfield oreo.CHILE-ARGENTINA BORDER REGION. MD 3.2 (SAN).NEAR EAST COAST OF HONSHU. JAPAN. Mw 5.8 (HRV). Felt

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JUN 1993 PAGE

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CENTRAL ALASKATURKEY MLTURKEY MLTURKElTURKEY.TURKEYTURKEYALBANI A.(ATH).EASTERN NEW GUINEA REG.GREECE ML 2.0 (THE) .SOUTHERN ALASKA. <AEIC>.STRAIT OF GIBRALTAR. mbLq 2.7 (MOD).SOUTHERN MID-ATLANTIC RIDGENORTH ISLAND, NEW ZEALAND. ML 3.9 (WEL)HAWAII <HVO-P>. MD 4.9 (HVO). Slight domoge (VI) atNoolehu Felt (V) ot Hawaii Volcanoes Notional Pork,Hilo, Poholo, Pohoa, PopoaIoa, Popaikou, Pepeekeo ondVolcano; (IV) ot Hokolou, Holuoloo. Honokao. Keoou,Loupohoehoe, Ookola ond Poouilo. Also felt ot Glenwoodand Kurtistown Felt throughout the island of HawaiiCENTRAL CALIFORNIA. <GM-P> MD 2.7 (GM). ML 2.7 (PAS).NEAR EAST COAST OF KAMCHATKA. Mw 7 1 (GS). 7.5 (HRV).Ms 7.2 (BRK). Mo-1 .8»10**20 Nm (OBN), 3.0»10**20 Nm(PPT). Domoge (VII) ot Severo-Kuri Isk Felt (VI) otPetropovIovsk-Komchotskiy. Maximum tsunami wave heights(peak-to-trough) recorded ot selected tide stationswere as follows: 12 cm. ot Hilo, 10 cm. on Shemya, 8cm. on Midway Island and 5 cm. ot Holeiwo, Howoi i .Depth from broadband displacement seismogroms.NEAR EAST COAST OF KAMCHATKATURKEY ML 2.8 (ISK).GREECE ML 1 .6 (THE) .PAKISTANTURKEY ML 2.7 (ISK).NEAR EAST COAST OF KAMCHATKASAN JUAN PROVINCE. ARGENTINATURKEY ML 2.7 (ISK)SAN JUAN PROVINCE. ARGENTINAREPUBLIC OF SOUTH AFRICASOUTHERN CALIFORNIA. <PAS-P>. ML 2 8 (PAS).CALIFORNIA-NEVADA BORDER REGION ML 3 8 (GS), 4 3( BRK )SOUTHERN NORWAY MD 1.8 (BER).

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JUN 1993 PAGE 8

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PAGE 9 JUN 1993

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(GS). 6.1 (HRV) Depth f rotn

JUN 1993 PAGE 18

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PAGE 15 JUN 1993

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JUN 1993 PAGE 16

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PAGE 17 JUN 1993

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JUN 1993 PAGE 18

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JUN 1993

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PAGE 21 JUN 1993

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FIJI ISLANDS REGIONTURKEY ML 3.0 (ISK )REPUBLIC OF SOUTH AFRICA. ML 3 4 (PRE)SAN JUAN PROVINCE, ARGENTINACENTRAL ALASKA ML 3.1 (PMR),KODIAK ISLAND REGION <AEIC>.SOUTHERN NORWAY MD 2.1 (BER).KERMADEC ISLANDS REGIONFRANCE ML 2 5 (GEN) .SAN JUAN PROVINCE, ARGENTINASOLOMON ISLANDSNORTHERN SUMATERA, INDONESIAROMAN I AOFF COAST OF CENTRAL CHILE. MD 4.3 (SAN)SAN JUAN PROVINCE, ARGENTINAPACIFIC-ANTARCTIC RIDGE. Mw 5.5 (HRV).NORTHERN MOLUCCA SEASOUTHERN CALIFORNIA. <PAS-P>Fe I t .SAN JUAN PROVINCE, ARGENTINANORTH SEA. MD 2.9 (BER).REPUBLIC OF SOUTH AFRICA. ML 2.8 (PRE).SAN JUAN PROVINCE, ARGENTINASOUTHERN ALASKA. <AEIC>. ML 2.5 (AEIC).SOUTH OF MARIANA ISLANDSNORTHERN MOLUCCA SEASICILY. ML 2.6 (ROM).GULF OF ALASKA. ML 2.5 (AEIC).LA RIOJA PROVINCE, ARGENTINAMONA PASSAGESAN JUAN PROVINCE, ARGENTINASOUTH OF SUMBAWA, INDONESIA. Mw 5.3 (HRV).MONA PASSAGEADMIRALTY ISLANDS REGION, P.N.G.NEAR ISLANDS. ALEUTIAN ISLANDS. ML 4.5 (PMR)DODECANESE ISLANDS. MD 5.0 (ATH), 4.6 (HLW).OFF EAST COAST OF KAMCHATKA. Felt (III) atPetropovlovs k-Kamcha t s k i y.SAN JUAN PROVINCE, ARGENTINANEAR COAST OF CENTRAL CHILE. MD 3.9 (SAN).

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REPUBLIC OF SOUTH AFRICA. ML 2 2 (PRE).NEAR COAST OF CENTRAL CHILE. MD 4 2 (SAN).NEAR COAST OF NORTHERN CHILEUNITED KINGDOMNORTHERN ITALY ML 2 1 (GEN)ALASKA PENINSULA <AEIC>.SAN JUAN PROVINCE, ARGENTINANORTHWESTERN BALKAN REGION. ML 2.1 (TTG).WrOMING. ML 3.0 (GS).CHILE-ARGENTINA BORDER REGIONTURKEY. ML 2.7 (ISK).TURKEY. ML 2.8 (ISK).TURKEY. ML 2.8 (ISK).REPUBLIC OF SOUTH AFRICAFLORES SEATURKEY. ML 2.8 (ISK).TURKEY. ML 2.7 ( ISK) .AUSTRI A ML 1.5 (VIE).NORTHERN ITALY. ML 1.9 (GEN).POLAND. ML 3.0 (WAR).KENAI PENINSULA, ALASKA. <AEIC>. ML 2 8 (AEIC)REPUBLIC OF SOUTH AFRICA. ML 2.4 (PRE).CHILE-ARGENTINA BORDER REGION. MD 3.5 (SAN).SOUTHERN CALIFORNIA. <PAS-P>. ML 2.7 (PAS).SOUTHERN ALASKA. <AEIC>.SOUTHERN ALASKA. <AEIC>.SOUTHERN NORWAY MD 2.0 (BER).SOUTHERN NORWAY. MD 2.2 (BER).SAN LUIS PROVINCE, ARGENTINANORTH ISLAND, NEW ZEALANDCENTRAL ALASKA. <AEIC>.SOUTHERN ALASKA. <AEIC>.SAN JUAN PROVINCE, ARGENTINACHILE-ARGENTINA BORDER REGION. MD 3.9 (SAN).NORTHERN IRANVANUATU ISLANDS REGION. Mw 6.7 (GS), 6.7 (HRV)Mo=2 6*10**19 Nm (PPT) Depth from broadbanddisplacement seismagrams.


01 07 27 50.54 48.178N 142 477E 48km 5.1mb ( 71 obs.) 4 5Msz ( 6 obs ) NEAR EAST COAST OF HONSHU. JAPAN CENTROID, MOMENT TENSOR Dato Used: GDSN L.P.B. : 9S, 10C Centraid Location: Origin Time 07.27.48. Lat 40.28N 0.12 Lon 142. 98E 0 22 Dep 59.313.9 Ho I f-dur o t i on 1 9 Principal Axes .

Scale 10.. 16 Nm T Val- 3 43 Pig-20 N 1 04 27 P -4 47 55

Best Double Couple Mo-4 NP1 : S t r i ke=236 NP2 . 114

(HRV)

1.9

Azm-183 284 61

3*18**16 D i p-34 S I i p 143

79 -61

01 15 53 47 11 45 711S 77 211VY 33km 5.3mb ( 17 obs.) 5 4Msz ( 31 abs.) OFF COAST OF SOUTHERN CHILE CENTROID. MOMENT TENSOR (HRV) Dato Used GDSN L.P B . : 47S . **C Cen t r o i d Loco tion: OriginTime 15 53 51.48.1 Lot 46 08S 0 82 Lon 77 64W 0 03 Dep 15 8 FIX Ho I f-durotion 2.5 P r incipa I Axes

Scale 10**17 NmT Val- 10 02 Plg=23 Azm-= 34N -1 61 67 217P -8 41 1 125

Best Double Couple Mo-9 2*18**17NP1 Strike-172 Dip-73 Slip- 16NP2: 77 75 162

02 03 00 18 42 46 471S 33.954E 10km5 6mb ( 42 obs ) 5 5Msz ( 32 obs PRINCE EDWARD ISLANDS REGION CENTROID. MOMENT TENSOR (HRV) Doto Used GDSN L P B.: 47S, 98C Cen t r o i d Loco tionOrigin Time 93.00 23.5 0.1 Lat 46 26S 0.02 Lon 34 10E 0 03 Dep 15.0 FIX Ha I f-duratian 2 0 Pr i nc i pa I Axes

Sea Ie 10..17 NmT Val- 6.36 Pig-14 Azm-332

N -9.78 72 114P -5.58 11 239

Best Double Coup Ie:Mo-6.0.10*»17NP1:Strike- 15 Dip-72 Slip- 177NP2: 106 87 18

02 08 27 19.18 51.513N 178 744W 33km 5.6mb (102 obs.) 5 4Msz ( 53 obs ) ANDREANOF ISLANDS, ALEUTIAN IS CENTROID, MOMENT TENSOR (HRV) Data Used. GDSN L.P.B. 46S, **C Centroid Location- Origin T ime 08:27:22.7 0.2 Lat 51 45N 0.92 Lon 178.28W 0 93 Dep 40.0 BDY Half-duration 2.1 Principal Axes

ScoIe 10.»17 NmT Vol- 5.17 Pig-72 Azm-301N -0.96 9 58P -5.11 16 150

Best Double Couple Mo-5.1 * 10** 17NP1 :Strike-253 Dip-30 Slip- 188NP2: 53 62 80

03 09 38 25 68 14.841S 167.299E 152km5.9mb ( 73 obs.)VANUATU ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B. 47S. »*CCentroid Location:Origin Time 09-38:30.1 0.1Lat 14 71S 0.02 Lon 167.26E 0.81Dep 143.6 0.5 Half-duration 2.6Principal Axes-


Best Double Couple Mo-1 .5.10** 1 8 NP1 Strike-237 Dip-26 Slip- -22 NP2: 347 88 -115

83 29 16 26 71 9 595N 126 512E 56km 5.2mb ( 49 obs.) 5 4Msz ( 21 obs.) MINDANAO, PHILIPPINE ISLANDS CENTROID, MOMENT TENSOR (HRV) Doto Used- GDSN L P.B 43S. 76C Cen t raid Loco t ian.

Origin Time 20:16:28.0 8.2 Lot 9.54N 0.03 Lan 127.88E 0.02 Dep 30.7 1.7 Half-duration 1 6 Pr i nc i pa I Axes:

Seale 10*.17 NmT Val- 2.87 pig-71 Azm-280N 8.21 2 183P -3 88 18 92

Best Double Coup Ie.Mo-3.0*10.»17NP1 Strike-178 Dip-27 Slip- 85NP2. 4 63 93

04 01 32 11 10 19 035N 26.395W 10km5 2mb (180 abs.) 4.9Msz ( 31 obs.)NORTH ATLANT I C OCEANCENTROID. MOMENT TENSOR (HRV)Dato Used: GDSNL.P.B.. 17S, 22CCen t r o i d Loca t i an:Origin Time 01:32:15-2 0.7Lat 19.29N 0.97 Lon 26.41W 0 06Dep 15.0 FIX Half-duration 1.2Pr i nc i pa I Axes:

Sea Ie 10**16 NmT Val- 9.24 Pig- 0 Azm-192 N 0.92 99 180 P -10.15 0 102

Best Dauble Coup Ie.Mo-9.7 * 10* 16 NP1 : St r i ke-237 Dip-98 Slip 180 NP2: 327 98 0

04 03 06 35.39 11.799N 142 493E 25km 5.6mb ( 68 abs ) 5 5Msz ( 39 obs ) SOUTH OF MARIANA ISLANDS CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 33S, 58C Cen t ro i d Loca t i on:Origin Time 03-06.40.8 8 3 Lat 11.89N 0.05 Lon 142 54E 0 04 Dep 20.9 BDY Half-duration 1.4 Pr i nc i pa I Axes.

Seale 10**17 NmT Vol- 3.33 Pig-52 Azm-359N 0 03 3 93P -3 36 37 186

Best Double Coup Ie:Mo-3.3*10** 17NP1 Strike-297 Dip- 8 Slip- 114NP2- 93 82 87

04 10 49 33 65 3.734N 128.497E 20km

PAGE 23 JUN 1993

5.9mb ( 78 obs ) 5 8Msz ( 57 obs.)NORTH OF HALMAHERA. INDONESIAFAULT PLANE SOLUTION P-Woves NP1 Strike-220 Dip-63 Slip- 135 NP2- 334 51 36

P r i ncipa I Axes:T Pig-50 Azm-181 P 7 280

Comment: The focal mechanism is moderately well controlled and corresponds to strike-slip faulting with a large reverse component. The preferred fault plane is not determined.

RADIATED ENERGYNo. of sta: 9 FacaI mech. F Energy 1 .4±0.4 * 10««13 Nm

MOMENT TENSOR SOLUTIONDep 40 No. of sta l9P r i ncipa I Axes:

Sea I e 10«»17 NmT Val- 9.70 Plg=73 Azm-135 N -0 29 4 31 P -9.41 17 299

Best Double Couple Mo-9.6»10*«17 NP1 Strike- 22 Dip-29 Slip- 81 NP2 213 62 95

CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B 44S, 95CCen t roid Loca t i on.Origin Time 10.49-43.0 0 2Lot 4.07N 0.02 Lon 128 55E 0.02Dep 46.6 1 2 Half-duration 2.4Principa I Axes:

Scole 10»»18 NmT Vol- 1 00 Plg=87 Azm=283 N 0 32 0 193 P -1 33 3 103

Best Double Coup Ie:Mo=1 .2«10»* 18 NP1 Strike=193 Dip-42 Slip- 90 NP2- 13 48 90

04 11 24 54 71 1 227N 123 310E 27km 5 4mb ( 49 obs ) 5 4Msz ( 3 obs.) MINAHASSA PENINSULA. SULAWESI CENTROID. MOMENT TENSOR (HRV) Dato Used: GDSN L.P.8. : 1 IS, 18C Cen t r o i d Loca t i on:Or i gin T i me 11 .24 56 6 0.9 Lot i 61N 0 10 Lon 122 80E 0.12 Dep 17.7 6.8 Ha I f-durotion 1.8 P r i ncipa I Axes:

ScoIe 10»»17 NmT Val- 1.85 Pig-60 Azm-103N -0.62 28 262P -1.24 9 357

Best Double Coup Ie.Mo=1 .5*10* * 17NP1 :Str ike-1 16 Dip-44 Slip- 133NP2. 244 60 57

05 22 12 20.36 29 998S 177 047W 33km 5 0mb ( 9 obs.) 4.6Msz ( 3 obs ) kERMADEC ISLANDS, NEW ZEALAND CENTROID. MOMENT TENSOR (HRV) Dato Used GDSN L P.8 21S, 32C Cen t r o i d Loca t i on:Or igin T ime 22 12:25.8 1 .6 Lot 29 72S 0.08 Lon 176 92W 0.12 Dep 15 0 FIX Half-durotion 1.0 Pr i ncipa I Axes:

Scole 10««16 NmT Val- 6 09 Plg=73 Azm-289N 0 86 0 11P -6 95 17 102

Best Double Couple Mo-6.5«10*«16NP1:Strike-192 Dip-28 Slip- 91NP2: 11 62 89

06 06 18 42 78 24 567S 175 857W 33km 5 2mb ( 19 obs.) 4 8Msz ( 2 obs.) SOUTH OF TONGA ISLANDS CENTROID. MOMENT TENSOR (HRV) Dota Used: GDSN L P.8 . 12S, 16C Cen t roid Loca t i on:Or i gin T ime 06 18:43. 1 1 1 Lot 24 59S 0 20 Lon 175.22W 0 12 Dep 26.1 8 5 Half-duration 1 0 P r i ncipa I Axe s

Scale 10* * 1 6 Nm

T Val- 5.63 Pig-63 Azm-325N -0.74 8 220P -4.89 26 126

Best Double Coup Ie:Mo-5.3»10»»16NP1 :Strike-199 Dip-20 Slip- 68NP2: 43 71 98

06 09 18 29.03 24.509S 175.928W 29km 5.4mb ( 29 obs.) 5.2Msz ( 35 obs.) SOUTH OF TONGA ISLANDS CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 40S, 68CCentroid Location:Origin Time 09:18:32.3 0.3Lot 24.55S 0.04 Lan 175.37W 0.03Dep 15.0 FIX Half-duration 1.4P r i nc i pa I Axes:

Scole 10»»17 NmT Val- 2.14 Pig-64 Azm-321 N 0.35 12 205 P -2.50 23 110

Best Double Coup Ie:Ma-2.3»10»»17 NP1 :Strike-177 Dip-24 Slip- 59 NP2: 30 69 103

06 13 23 20 86 15 823N 146 595E 14km 6.0mb (106 obs ) 6 6Msz ( 68 obs.) MARIANA ISLANDS FAULT PLANE SOLUTION: P-Waves NP1 Strike- 9 Dip-75 Slip- 60 NP2: 255 33 152

P r i nc i poI Axes:T Pig-51 Azm-245 P 24 122

Comment. The focal mechanism is paorly controlled and corresponds to reverse faulting with a mode rate right-laterol strike-sl ip component The preferred fault pI one i s NP2.

RADIATED ENERGYNa. of sta: 21 Focal mech. F Energy 6 3±1.3«10*«13 Nm

MOMENT TENSOR SOLUTION Dep 29 No. of sta: 33 P r i nc i poI Axes.

Sea Ie 10* 18 NmT Vol- 6 20 Pig-61 Azm-220 N 0.11 24 1 P -6.31 16 98

Best Double Coup Ie.Mo-6.3»10««18 NP1 : Strike-219 Dip-35 Slip- 134 NP2 349 65 64

CENTROID, MOMENT TENSOR (HRV) Dato Used: GDSN L.P.B. 51S, »*C Cen t ro i d Loca t i on Origin Time 13'23 28.0 0.1 Lot 15 57N 0.01 Lon 147 23E 0 01 Dep 15 0 FIX Half-duration 4.2 P rincipa I Axes

Scale 10**18 NmT Val- 5.28 Plg=65 Azm=245N -0.21 11 0P -5.07 22 95

Best Double Coup Ie Mo-5.2*10*«18NP1:Strike-205 Dip-25 Slip- 118NP2: 356 68 78

07 07 49 35.11 35.972N 141.529E 36km 5.6mb (114 abs.) 5.5Msz ( 41 obs ) NEAR EAST COAST OF HONSHU, JAPAN CENTROID. MOMENT TENSOR (HRV) Dota Used: GDSN L.P.B.: 40S, 86C Centraid Location:Origin Time 07:49:38 4 0.2 Lot 35.88N 0.02 Lan 141.63E 0.03 Dep 19.0 BDY Half-duration 1.7 Principal Axes:

Sea Ie 10» »17 NmT Val- 4.65 Pig-62 Azm-268N 0.66 9 17P -5.31 26 111

Best Double Coup Ie.Mo-5.0*10** 1 7NP1:Strike-222 Dip-21 Slip- 117NP2: 13 71 80

07 13 14 38 51 35 286N 141 909E 11km 5 3mb ( 64 obs.) 4 9Msz ( 24 obs ) NEAR EAST COAST OF HONSHU. JAPAN

CENTROID. MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 12S, 15CCen t ro i d Loca t i on:Or i gi n T ime 13:14.39.3 8.7Lot 35.24N 0.13 Lan 141.27E 8.14Dep 15 0 FIX Half-duration 1.8Pr i nc i poI Axes:

Scale 10**17 NmT Val- 1.10 Pig-40 Azro-287 N 0.27 4 20 P -1.37 50 115

Best Double Coup Ie:Ma-1 .2*10**17 NP1 . St r i ke-344 Dip- 7 Slip 127 NP2 201 85 -86

08 13 03 36.48 51.218N 157.829E 71km 6.4mb (122 abs.) 7.3Msz ( 44 abs.) NEAR EAST COAST OF KAMCHATKAFAULT PLANE SOLUTION: p-wavesNP1:Strike- 40 Dip-58 Slip- 80 NP2: 238 33 106

Pr i nc i pa I Axes :T Pig-75 Azm-282 P 12 137

Comment: The focal mechanism is moderately well controlled and corresponds to reverse faulting with a small right- lateral strike-slip component. The preferred fault plane is NP2.

RADIATED ENERGYNo. of sta: 36 Facal mech. F Energy 2.5±0 2*10**14 Nm

MOMENT TENSOR SOLUTIONDep 86 No. of sta: 12P r i nc i poI Axes

Scale 10«*19 NmT Val- 5.42 Pig-77 Azm-382 N -0 12 4 52 P -5.31 12 143

Best Double Couple Mo-5 4*10**19 NP1.Strike-239 Dip-33 Slip- 98 NP2 50 57 85

CENTROID. MOMENT TENSOR (HRV)Doto Used GDSNL P.8 : 51S. **C M.W. 44S, **CCen t roid Loca tion:Or i g i n Time 13.0357.40.1Lot 51 36N 0.01 Lon 158.75E 0.01Dep 45.9 0 2 Half-duration 13.4Principal Axes .


Best Double Coup Ie:Ma-2.0*10**20 NP1:Strike-207 Dip-29 Slip- 79 NP2: 39 61 96

08 23 17 41.44 31 560S 69.234W 113km 6 5mb ( 91 obs.) SAN JUAN PROVINCE, ARGENTINAFAULT PLANE SOLUTION, p-wavesNP1 Strike-215 Dip-55 Slip- -70 NP2 3 40 -116

Principal Axes:T p| g- g Azm-291 P 72 176

Comment: The focal mechanism is moderotely well controlled and corresponds ta normal faulting with o moderate strike-slip component. The preferred fault plane is not determined.

RADIATED ENERGYNo. of sta: 10 Facal mech. F Energy 1 . 1±0.3*10** 14 Nm

MOMENT TENSOR SOLUTION Dep 131 Na. of sta: 23 P r i nc i pa I Axes:

Scale 10**18 NmT Val- 3.55 Pig- 1 Azm-312N -0.17 11 222P -3.38 79 47

Best Double Couple Mo-3.5*10** 18NP1.Strike- 53 Dip-45 Slip- -75NP2: 211 47 -105

CENTROID, MOMENT TENSOR (HRV)Dato Used: GDSNL.P.8.. 53S, »*C M.W.: IS, 1C Cen t roid Loca tian.

JUN 1993 PAGE

Origin Time 23.17.47.1 0.1 Lot 31 62S 0.01 Lon 69 1 3W 0.02 Dep 124.5 0 6 Half-duration 3.5 P r i ncipa I Axes:

Sea I e 10* * 18 NmT Val- 3.29 Pig- 4 Azm-313N -0.27 3 44P -3.82 ^5 172

Best Double Couple Mc = 3.2*10** 18NP1 Strike- 40 Dip-41 Slip- -95NP2: 226 49 -86

10 12 84 56.41 51.170N 159 097E 21 km 5 5mb ( 93 obs.) 5 2Msz ( 14 abs ) OFF EAST COAST OF KAMCHATKA CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L . P.B . 34S, 62C Cen t raid Loca t ion.Origin Time 12:04:59.4 0 . 4 Lot 50 74N 0.05 Lan 159.83E 0.06 Dep 20.2 2.0 Half-duration 1 3 Principal Axes

Sea I e 10» * 17 NmT Val- 1 30 Pig-72 Azm-349N 0.10 11 223P -1.40 14 130

Best Double Coup Ie Mo-1 .4»10» 17NP1:Strike-205 Dip-32 Slip- 69NP2: 49 60 103

10 12 58 59.49 51.115N 159.272E 16km 5 8mb (113 abs.) 5.1Msz ( 31 obs.) OFF EAST COAST OF KAMCHATKA CENTROID. MOMENT TENSOR (HRV) Data Used: GDSN L.P.B. 31S, 51C Cen t r oid Laca t i on:Origin Time 12:59: 2.4 04 Lot 50.78N 0.04 Lan 159.98E 0.05 Dep 26.2 2.0 Half-duration 1 3 P rinc i pa I Axes:

Sea Ie 10* 17 NmT Val- 1 36 Pig-74 Azm=354N 0.16 11 222P -1.52 12 130

Best Double Couple Mo- 1 .4 1 0««17NP1 . Strike-206 Dip-35 Slip- 71NP2: 49 58 103

10 17 48 38.30 24.353S 176 082W 34km5 7mb ( 50 abs.) 5.4Msz ( 45 obs )SOUTH OF FIJI ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 26S, 56CCentraid Location:OriginTime 17:48:41707Lot 24 62S 0.03 Lan 175.47W 0.05Dep 30 0 FIX Half-duration 1.5Principal Axes:

Scale 10»»17 NmT Val- 3.04 Pig-70 Azm-308 N 0.46 7 200 P -3.49 19 107

Best Double Coup Ie.Ma-3.3»10»«17 NP1:Strike-186 Dip-26 Slip- 75 NP2: 23 64 97

12 05 45 21.21 11.140S 162 937E 15km 5 5mb f 49 obs.) 6.1Msz ( 49 obs.) SOLOMON ISLANDSFAULT PLANE SOLUTION. P-Waves NP1 Strike-113 Dip-67 Slip- 90 NP2 293 23 90

Principal AxesT Pig-68 Azm- 23 P 22 203

Comment: The facal mechanism is poorly controlled and corresponds to reverse faulting The preferred fault plane is NP2

RADIATED ENERGYNo of sta: 12 Focal mech. F Energy 3 0±0 5*10«*12 Nm

FOMENT TENSOR SOLUTION Jep 6 No. a f s to: 30 Pr i nc i pa I Axes

Sea Ie 10» 18 NmT Val- 1 37 Pig-46 Azm- 26 N 0 02 23 270 P -1 39 35 162

Best Double Couple Mo-1 .4*10** 18 NP1 Strike-195 Dip«24 Slip- 14 NP2 92 84 113

CENTROID, MOMENT TENSOR (HRV) Data Used GDSN L P B : 49S , «*C Centroid LocationOrigin Time 05 45:27.9 0.1 Lot 10.90S 0 02 Lon 163 28E 6.02 Dep 17 0 BDY Half-duration 2.4 P r i nc i pa I Axes

Sea Ie 10* «17 NmT Val- 12 00 Pig-65 Azm- 3N -0 31 1 271P -11.68 25 180

Best Double Couple Mo-1 .2 * 10*«18NP1 :Str ike-268 Dip-20 Slip- 87NP2: 91 70 91

12 07 01 59.88 5.609S 148.095E 157km 5.7mb ( 65 abs.) NEW BRITAIN REGION, P.N.G. FAULT PLANE SOLUTION: P-Waves NP1 :Str ike-105 Dip-55 Slip- -90 NP2. 285 35 -90

P r i nc i pa I Axes:T Pig-10 Azm«!95 P 80 15

Comment: The focal mechanism is poorly controlled and corresponds to normal faulting. The preferred fault plane is not determined.

RADIATED ENERGYNo. of sta 10 Focal mech F Energy 2.3±0 7*10**12 Nm

CENTROID, MOMENT TENSOR (HRV) Dota Used GDSN L P.B : 35S. 57C Centroid Loca t i on.Origin Time 07 02 4505 Lot 5 56S 0.0+ Lon 148.33E 0.04 Dep 162 7 1 3 Half-duration 1.7 P r i nc i pa I Axes:

ScoIe 10« 17 NmT Vol= 3 84 Plg=10 Azm-222N 074 12 129P -4 58 74 351

Best Double Couple Mo-4.2*10»* 17NP1.Strike=326 D i p=36 SI ip= -69NP2. 121 56 -105

12 11 15 07.47 13 250N 87 528W 218km5.4mb ( 98 obs )HONDURASCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B : 47S , **CCentroid Loca t i an:Origin T ime 11:15:12.70.2Lot 13.26N 0.01 Lon 87.60W 0.02Dep 208.3 0.7 Ha I f-durotion 2.1P r i nc i pa I Axes'

Seale 10* * 17 NmT Val- 7.23 Pig-58 Azm- 63 N -0.59 8 319 P -6.64 31 224

Best Double Coup Ie.Mo-6.9*10** 17 NP1:Strike-289 Dip-16 Slip- 59 NP2 141 76 99

12 18 26 42.22 4.375S 135.118E 10km5 8mb ( 42 abs.) 6.1Msz ( 56 abs.)IRIAN JAYA REGION. INDONESIAFAULT PLANE SOLUTION p-wavesNP1.Strike-170 Dip-72 Slip- 167 NP2: 264 78 18


Comment: The focal mechanism is moderately well controlled and corresponds to strike slip faulting with a mode rate reverse component. The preferred fault plane is not de te rm i ned

RADIATED ENERGYNo af sta: 17 Focal mech. F Energy 3.8±0 9*10««13 Nm

MOMENT TENSOR SOLUTIONDep 16 Na of s ta 19 Pr i nc i pa I Axes

ScoIe 10**18 NmT Val- 1 69 Pig-15 Azm-129 N -0 13 72 347 P -1 57 11 222

Best Double Coup Ie.Ma-1 .6*10** 18 NP1 Strike=266 Dip-72 Slip- 3 NP2 175 87 162

CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B 48S, **C M W.: 42S, 59CCen t ro i d Laca tion:Origin Time 18 26:46.4 0.2Lot 4 31S 0.01 Lan 135.11E 0 01Dep 15.0 FIX Half-duration 2.5Pr i nc i pa I Axes.

Sea Ie 10«*18 NmT Val- 1.52 Pig-23 Azm-123 N 0 09 61 343 P -1 61 17 220

Best Double Coup Ie:Ma-1 .6*10** 18 NP1:Strike-263 Dip-61 Slip- 5 NP2: 170 86 151

12 20 33 25.70 51.259N 157.692E 44km 5.9mb (171 obs.) 6.0Msz ( 61 obs.) NEAR EAST COAST OF KAMCHATKA FAULT PLANE SOLUTION: P-Waves NPl:Strike- 20 Dip-63 Slip- 80 NP2: 221 29 109

Principal Axes:T Pig-70 Azm-269 P 17 117

Comment. The focal mechanism is moderately well controlled and corresponds to reverse faulting with a smoII s t r i ke- slip component. The preferred fault pi one is NP2.

RADIATED ENERGYNo. of sta: 34 Facal mech. M Energy 9. 1±1 .2*10** 12 Nm

MOMENT TENSOR SOLUTION Dep 40 No. af sta: 24 Pr i nc i poI Axes:

Sea Ie 10**18 NmT Val- 2 90 Pig-63 Azm-224N -0 39 25 21P -2 50 9 115

Best Double Coup Ie.Mo-2.7*10*« 1 8NP1 Strike-232 Dip=42 Slip- 129NP2 5 59 61

CENTROID, MOMENT TENSOR (HRV)Data Used. GDSNL P B. 52S, **C M W : 33S. 53C Centroid Loca t i an:Or i gin T,me 20:33:31 .8 0.1 Lot 51 02N 0 01 Lon 158.21E 0.01 Dep 55 0 BDY Half-duration 3.2 P r incipa I Axes'

Sea Ie 10**18 NmT Val- 2 63 Pig-77 Azm-297N 0.03 1 32P -2.66 13 123

Best Double Coup Ie:Ma-2.6*10** 18NP1 Strike-214 Dip-32 Slip- 92NP2: 31 58 89

13 00 39 10.47 6.3B0S 155.476E 194km5.5mb ( 68 obs.)SOLOMON ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 25S, 36CCentraid Laca t i an:Origin Time 00:39:12.3 0 5Lot 6.42S 0.06 Lan 155.50E 0.08Dep 188.8 1.3 Half-duration 1.6Principal Axes:

Sea Ie 10**17 NmT Val- 2 18 Pig- 9 Azm=138 N 0.69 2 48 P -2 87 80 305

Best Double Coup Ie:Ma-2.5*10** 17 NP1.Strike-231 Dip-36 Slip- -86 NP2 46 54 -93

13 13 35 36.34 11.162S 163.113E 39km 5.2mb ( 37 obs ) 5.0Msz ( 10 abs.) SOLOMON ISLANDSCENTROID. MOMENT TENSOR (HRV) Data Used: GDSN L.P B 42S, 81C Centroid Laca tian:

PAGE 25 JUN 1993

Or i gi n T ime 13:35:37.9 6 3 Lot 11.06S 0 63 ton 163.13E 6.63 Dep 15.6 FIX Half-durotion 1.2 Principal Axes:

Sea Ie 10**17 NmT Val- 1.95 Pig-63 Azm-330N -6.25 8 77P -1.71 25 171

Best Double Couple Mo-1 .8*1e** 17NP1.Strike-280 Dip-21 Slip- 114NP2: 74 71 81

13 23 26 46.44 39 363N 26.495E 26km 5 3mb ( 96 obs.) 4 9Msz ( 5 obs.) GREECE-ALBANIA BORDER REGION CENTROID. MOMENT TENSOR (HRV) Data Used GDSN L P . B . : 18S, 34C Centroid Location:Origin Time 23:26:42.7 6.5 Lot 39.03N 6.67 Lan 26.14E 6.66 Dep 15.6 BDY Half-duration 1.1 P r i nc i pa I Axes:

Sea Ie 10** 1 7 NmT Val- 1.08 Pig-78 Azm-311N -6.05 12 139P -1.03 2 49

Best Double Coup Ie.Ma-1 .0*10* 17NP1:Strike-127 Dip-45 Slip- 73NP2: 330 48 106

13 23 30 22.97 1 1 .209S 163.173E 35km5.0mb ( 14 obs.) 4.9Msz ( 5 obs.)SOLOMON ISLANDSCENTROID, MOMENT TENSOR (HRV)Dato Used: GDSNL.P . B . : 19S, 27CCentraid Location:Origin Time 23:30:28.8 0 6Lot 10.J58S 0.09 Lon 163.32E 0.09Dep 15.0 FIX Half-duration 1 0P r inc i pa I A xes

Sea Ie 10**16 NmT Vol- 12.38 Pig-64 Azm-33B N -3.71 2 72 P -8 67 26 163

Best Double Couple Mo-1 . 1«10** 17 NP1:Strike-258 Dip-19 Slip- 97 NP2: 71 71 88

15 04 42 57.39 34 868N 141 683E 47km 5 4mb ( 93 obs.) 5.3Msz ( 32 obs.) OFF EAST COAST OF HONSHU, JAPAN CENTROID, MOMENT TENSOR (HRV) Data Used GDSN L.P.B. : 23S, 31C Centroid Location.Origin Time 04:42:57.7 0 6 Lot 34.31N 0.06 Lon 142.21E 0.06 Dep 15.0 FIX Half-duration 1.2 P rinc i poI Axes:

Scol e 10**16 NmT Vol- 6.87 Pig-67 Azm-228N 2 32 23 36P -9.19 4 128

Best Double Couple Mo-8.0*10** 16NP1 Strike-240 Dip-45 Slip- 123NP2. 18 53 61

15 13 86 34 28 4 991S 145 459E 227km5 5mb ( 61 obs.)NEAR N COAST OF NEW GUINEA, PNG.CENTROID, MOMENT TENSOR (HRV)Doto Used GDSNL P B 48S, **CCentroid Loco tionOr .gin T ime 130639.601Lot 5 19S 0 01 Lon I45.48E 0.01Dep 227.& 0 8 Ho I f-durot ion 2.8P rinc i poI Axes:

Scol e 10* 18 NmT Vol- 1 76 Pig- 9 Azm- 28 N 0 26 63 135 P -2 02 25 294

Best Double Couple Mo-1 9«10**18 NP1 Strike- 73 Dip-66 Slip 168 NP2 338 79 -24

15 23 12 24 83 35 629N 77.788E 33km 4 9mb ( 43 obs.) EASTERN KASHMIRCENTROID, MOMENT TENSOR (HRV) Data Used. GDSN

L P B.: 9S. 12CCentroid Location:Or igin Time 23:12:23.2 2.3Lot 35.19N 0.25 Lon 77.53E 0.14Dep 15.0 FIX Half-duration 1.0P r i nc i pa I Axes:

Scale 10**16 NmT Val- 4.50 Pig- 3 Azm-321 N -0.69 69 224 P -3.82 20 52

Best Double Coup Ie:Ma-4.2*10** 16 NP1.Strike- 95 Dip-74 Slip- -13 NP2: 188 78 -163

16 05 44 49.17 14.735N 92.695W 57km5 0mb ( 69 abs.)NEAR COAST OF CHIAPAS, MEXICOCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL P.B : 31S, 44CCentroid Location:Origin Time 05:44:48.1 0.4Lot 14.25N 0.05 Lon 93.12W 0.05Dep 53.9 4.5 Half-duration 1.1P r i nc i pa I Axes:

Scale 10**16 NmT Val- 8.18 Pig-29 Azm- 42 N 1 65 13 305 P -9.83 58 194

Best Double Coup Ie.Mo-9.0*10** 16 NP1.Strike-164 Dip-19 Slip- -49 NP2 302 76 -103

16 06 59 20.57 21.779S 173.768W 35km5 6mb ( 54 obs.) 4 9Msz ( 26 obs.)TONGA ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 36S, 59CCentroid Location:Origin Time 06:59:25.3 0.3Lot 21.94S 0.04 Lan 173.44W 0.03Dep 60.5 2.1 Half-duration 1.9P r i nc i poI Axes:


Best Double Coup Ie:Mo-1 .2*10** 17 NP1.Strike-159 Dip-37 Slip- 58 NP2 18 59 112

16 21 08 38.75 1.413N 90.919W 22km 4.7mb ( 11 obs ) 5.0Msz ( 1 obs ) GALAPAGOS ISLANDS REGION CENTROID, MOMENT TENSOR (HRV) Goto Used: GDSN L P.B.: 27S, 42C Cen t ro i d Loca t i an:Or i g i n T ime 21 :08:42. 1 0.4 Lot 1.60N 0.04 Lon 90.67W 0 04 Dep 15.0 FIX Ha I f-durotion 1.3 Pr i ncipoI Axes:

Scale 10**16 NmT Val- 9.34 Plg« 0 Azm-219N -1.44 90 180P -7.89 0 129

Best Double Coup Ie.Mo-8.6*10** 16NP1 : St r i ke-264 Dip-90 Slip 180NP2: 354 90 0

18 08 45 19.44 28.444S 176.991W 33km 5.1mb ( 21 abs.) 5.3Msz ( 30 obs.) KERMADEC ISLANDS REGION CENTROID, MOMENT TENSOR (HRV) Dato Used: GDSN L P.B.: 40S, 77C Cen t ro i d Lacat i an:Origin Time 08:45:22.8 0.3 Lot 28 59S 0.04 Lon 176.34W 0.02 Dep 15.0 FIX Half-duration 1.5 P r i ncipoI Axes:


Best Double Coup Ie:Mo-2.4 10«* 17NP1 . Strike-197 Dip-26 Slip- 97NP2: 9 65 87

18 11 52 51.68 29.853S 176 753W 16km6 2mb ( 9 obs ) 6.7Msz ( 21 obs ) KERMADEC ISLANDS REGION

FAULT PLANE SOLUTION: P-Waves NP1:Strike-190 Dip-22 Slip- 90 NP2: 10 68 90

P rinc i poI Axes:T Pig-67 Azm-280 P 23 100

Comment: The focal mechanism is poorly controlled and corresponds to reverse faulting. The preferred fault plane is NP2.

RADIATED ENERGYNa. of sta' 16 Facal mech. M Energy 2.7t0.4*10** 13 Nm

MOMENT TENSOR SOLUTION Dep 5 No. of s ta: 8 P r i nc i pa I Axes:

Scale 10**18 NmT Val- 7 28 Pig-56 Azm-232N 0.62 22 359P -7.90 25 100


CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 48S. **C M.W.: 46S, 90C Centraid Location: Origin Time 11:52:57.6 0.1 Lot 28.50S 0.01 Lan 176.40W 0.01 Dep 15.0 FIX Half-duration 4.6 P r i nc i pa I Axes:


Best Double CaupIe:Mo-8.8*10** 1 8NP1 :Strike-188 Dip-21 Slip- 81NP2: 17 69 93

18 17 38 30.33 28.772S 176.881W 33km 5.4mb ( 34 obs.) 6.1Msz ( 14 abs.) KERMADEC ISLANDS REGION CENTROID. MOMENT TENSOR (HRV) Doto Used: GDSN L P.B 29S, 50C Cen t ro i d Loco tion Origin T ime 1 7:38:35. 1 0.3 Lot 28.71S 0 06 Lon 176.40W 0.04 Dep 17 0 BDY Half-duration 3.3 P rinc i pa I Axes


Best Double Coup Ie:Mo-7.1 * 10**17NP1:Strike-191 Dip-21 Slip- 87NP2: 14 69 91

18 17'57 46.61 28.678S 176.893W 11km 5.9mb ( 69 obs.) 6.7Msz ( 53 obs.) kERMADEC ISLANDS REGIONRADIATED ENERGYNo of sta: 10 Focal mech. C Energy 2.7t0.4*10* 13 Nm

MOMENT TENSOR SOLUTION Dep 28 No. af sta: 10 P r i nc i pa I Axes:



CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 52S, **C Centroid Location: Origin Time 17:57:57.5 0.1 Lot 28.37S 0.02 Lon 176.27W 0.02 Dep 15.0 FIX Half-duration 5.9 P r i nc i pa I Axes:

Sea Ie 10**18 NmT Val- 6.45 Pig-67 Azm-283N 1.12 0 14P -7 57 23 104

Best Double Coup Ie:Mo-7.0*10** 18NP1 :Str ike-195 Dip-22 Slip- 91NP2: 14 68 90

19 10 02 05.50 2.242S 137 922E 33km 5.2mb ( 40 obs.) 4.7Msz ( 5 obs.)

JUN 1993 PAGE 26

IRIAN JAVA, INDONESIACENTROID, MOMENT TENSOR (HRV)Dota Used: GDSNL.P.B. 17S, 22CCentroid Location:Origin Time 10:02: 9 4 1.5Lat 1.99S 0.10 Lon 138.28E 0 09Dep 31.7 4.9 Ho I f-doration 1.0P r i nc i poI Axes:

Scale 10*«16 NmT Val- 9.81 Pig-50 Azm-351 N 0.40 27 119 P -10.20 27 224

Best Double Couple.Mo-1 0*10**17 NP1.Strike-359 Dip-31 Slip- 154 NP2- 112 77 62

19 12 23 30.60 10.175N 103 627W 10km 5 2mb ( 57 obs.) 5.3Msz ( 25 obs ) OFF COAST OF MEXICO CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 425, 86C Cent raid Locot i on:Origin T ime 12:23:35.1 0.2 Lat 10.43N 0.02 Lon 103.57W 0.02 Dep 15.0 FIX Half-duration 4.0 Pr i nc i pa I Axes:

Sea Ie 10« «17 NmT Vol- 4.63 Pig-14 Azm-308N 0.66 72 86P -5.28 11 215

Best Double Coup Ie:Mo-5.0«10«* 17NP1:Strike-351 Dip-72 Slip- 178NP2: 82 88 18

19 15 33 00 24 28.299S 176 643W 33km 5 5mb ( 34 obs.) 5.7Msz ( 52 obs.) KERMADEC ISLANDS REGION CENTROID, MOMENT TENSOR (HRV) Data Used GDSN L.P.B. 42S, 88C Cen t ra i d Loca t i on Origin T ime 15:33: 4.50.2 Lot 28 11S 0 03 Lon 176.05W 0.02 Dep 15 0 BDr Half-duration 1.7 Pr i nc ipa I Axes:

Sea I e ie«*17 NmT Val- 4 23 Pig-66 Azm-288N 0.84 1 195P -5.07 24 104

Best Double Couple Mo-4.7«10«* 17NP1 Strike-191 Dip-21 Slip- 87NP2. 15 69 91

20 02 22 52.14 28.562S 176.356W 33km 5 5mb ( 28 obs.) 5.5Msz ( 44 obs.) KERMADEC ISLANDS REGION CENTROID, MOMENT TENSOR (HRV) Dota Used: GDSN L.P.B.: 20S, 31C Cen t ro i d Loca t i on:Origin Time 02:22:51.6 0.5 Lot 28.41S 0.09 Lon 175.63W e.06 Dep 15.0 FIX Hoif-duration 1.2 Pr i nc i pa I Axes:

Scole 10««16 NmT Val- 13.67 Pig-61 Azm-322N 2.12 13 206P -15.79 25 110

Best Double Coup Ie:Mo-1 .5«10««17NP1.Strike-173 Dip-24 Slip- 54NP2. 31 71 104

20 07 44 38 58 5 649S 153 195E 33km5.1mb ( 34 obs.) 4.4M s z ( 1 obs.)NEW IRELAND REGION, PNG.CENTROID, MOMENT TENSOR (HRV)Dota Used: GDSNL P.B . 19S, 24CCen t r o i d Laca t i on:Origin Time 07.4445.808Lot 5 575 0.10 Lon 153 32E 0 11Dep 28.3 5.8 Ho I f-duration 1.0Principal Axes:

Scole 10t»16 NmT Val- 4.84 Pig-23 Azm-109 N 1 22 14 13 P -6.06 62 255

Best Double Couple.Mo-5 4*10»«16 NP1:Strike-225 Dip-25 Slip- -55 NP2: 8 76 -105

20 17 26 30.68 6.946S 155.776E 38km5 5mb ( 60 obs.) 5.6Msz ( 48 obs.)SOLOMON ISLANDSCENTROID, MOMENT TENSOR (HRV)Doto Used: GDSNL.P.B.: 41S, 92CCen t ro i d Loca t i on:Or i gi n T ime 1 7 : 26:36.6 0 . 1Lat 7.13S 0.02 Lon 155.70E 0.02Dep 41.0 BDY Ha If-durotion 1.9Pr i nc i poI Axes:

Sea Ie 10**17 NmT Vol- 5.59 Pig-75 Azm-117 N 0.21 14 316 P -5.80 5 225

Best Double CaupIe:Ma-5.7*10««17 NP1 : Strike-300 Dip-42 Slip- 69 NP2: 148 51 108

21 16 54 48.55 49.182N 150.423E 348km5.2mb (134 obs.)NORTHWEST OF KURIL ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 12S. 14CCen t r o i d Loco t i onOrigin T ime 16.54 53.8 2.0Lat 49.73N 0.14 Lon 150 05E 0 18Dep 343.7 9 5 Ho I f-duration 1.0Pr i nc i poI Axes:

ScoIe 10*«16 NmT Val- 4.46 Pig-25 Azm- 59 N 0.65 45 176 P -5.11 35 310

Best Double Couple Mo-4.8«10«* 16 NPl.Strike- 98 Dip-46 Slip 171 NP2: 2 84 -44

22 12 33 45 04 64 624N 17.543W 5km5.1mb ( 76 obs.) 4 8Msz ( 26 obs.)ICELANDCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B. : 30S, 49CCen t ra i d Loca t i on:Origin T ime 12:33:53.8 0.4Lot 64.73N 0.04 Lon 17.56W 0 10Dep 15.0 BDY Half-duration 1.1Principal Axes:

Scole 10«*16 NmT Val- 13.11 Pig-65 Azm=284 N -6 29 21 139 P -6.82 13 44

Best Double Cauple:Mo-1 0*10**17 NP1 :Str ike-109 Dip-37 Slip- 53 NP2: 331 61 114

22 15 01 43.48 6.499S 130.167E 147km5.4mb ( 44 obs. )BANDA SEACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P B.: 305, 41CCen t r o i d Loca tion:Or i g i n T ime 1 5 01 :47 4 0 . 5Lat 6.48S 0.05 Lon 130.13E 0.06Dep 158.2 1 4 Ha I f-durotion 1.1Pr i nc i poI Axes:

Seale 10**16 NmT Val- 11.95 Pig-46 Azm-247 N -2.83 12 144 P -9.12 41 43

Best Double Coup Ie:Mo-1.1«10««17 NP1:Strike- 66 Dip-13 Slip- 12 NP2: 324 87 102

22 16 32 43.73 30.149N 50.814E 33km5.5mb (121 obs.) 4.8Msz ( 27 abs.)NORTHERN IRANCENTROID, MOMENT TENSOR (HRV)Dato Used: GDSNL P B : 22S, 34CCentroid Location:Or i gin T ime 1 6 : 32 : 46.3 0.4Lat 30 01N 0.07 Lon 50.40E 0 08Dep 15.0 8DY Half-duration 1.1P r i ncipoI Axes

Scole 10»«17 NmT Val- 1.45 Pig-65 Azm-179 N -0.37 5 279 P -1.08 24 12

Best Double Couple Mo-1 3*10**17 NP1 :Str i ke-112 Dip-21 Slip- 104

NP2 . 278 70 85

23 11 29 19.35 60.549S 56.376W 10km6.2mb ( 19 obs ) 5.4Msz ( 29 obs.)SOUTH SHETLAND ISLANDSCENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 34S, 69CCentroid Location:Or ig i n T ime 11 :29:24 2 0.2Lot 60.59S 0.02 Lon 56 76W 0.05Dep 15.0 FIX Half-duration 1.8Pr i nc i poI Axes:

Scole 10«*17 NmT Vol- 4.49 Pig- 6 Azm-351 N 1.00 79 226 P -5.49 9 82

Best Double CaupIe.Mo-5.0*10** 17 NP1:Strike-126 Dip-79 Slip- -2 NP2: 216 88 -169

24 12 45 29.58 6.430S 147.396E 73km5.1mb ( 28 obs.)EASTERN NEW GUINEA REG., P.N.G.CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 36S, 61CCentroid Location:Or igi n T ime 12 : 45:31.7 0.5Lat 6.70S 0.04 Lon 147.44E 0.05Dep 60.0 2.9 Half-duration 1.0Pr i nc i pa I Axes:

Scale 10««16 NmT Val- 6.34 Pig-63 Azm- 82 N 0.49 26 278 P -6.84 7 185

Best Double Coup Ie:Mo-6.6«10»«16 NP1:Strike-249 Dip-45 Slip- 52 NP2: 117 57 121

25 07 23 17.05 28.673S 176.447W 60km 5.3mb ( 35 abs.) 5.1Msz ( 10 obs.) KERMADEC ISLANDS REGION CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.. 15S, 22C Centraid Location:Origin T ime 07:23: 17 . 1 1.4 Lat 28.52S 0.13 Lon 176.19W 0.11 Dep 28.7 5.8 Ho I f-durat ian 1.2 Pr i nc i pa I Axes:

ScoIe 10**16 NmT Val- 9.74 Pig-33 Azm-110N 0.49 4 17P -10.22 56 281

Best Double Coup Ie.Mo-1 .0*10*«17NP1:Strike-217 Dip-12 Slip- -70NP2 16 78 -94

25 07 44 10.87 28 8355 176.419W 70km 5 0mb ( 14 obs.) 5.4Msz ( 24 obs.) KERMADEC ISLANDS REGION CENTROID, MOMENT TENSOR (HRV) Dota Used: GDSN L P.B.. 31S, 49C Centroid Location:Origin T ime 07:44:11 .2 0.5 Lot 28.46S 0.05 Lon 176.14W 0.05 Dep 15.0 FIX Half-duration 1.4 Pr i nc i poI Axes:


Best Double Coup Ie.Mo-2.0*10** 17NP1:Strike-220 Dip-20 Slip- 126NP2: 3 74 78

27 11 56 11.04 51.246N 158.914E 41km 5.6mb (123 obs.) 4.8Msz ( 31 obs.) NEAR EAST COAST OF KAMCHATKA CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B. 27S, 41C Cen t r o i d Loca t i on:Origin Time 1 1 .56: 1 2.0 0 . 5 Lat 51.08N 0.06 Lon 159.44E 0.07 Dep 20 0 2.9 Half-durotion 1.0 Pr i nc i poI Axes:

Seal e 10«*16 NmT Val- 8.79 Pig-60 Azm-350 N 0.15 18 226 P -8.94 23 128

PAGE 27 JUN 1993

Best Double Couple Mo«8.9*10»»16 NP1:Strike-186 Dip-27 Slip- 47 NP2. 52 70 109

27 15 32 59.02 9.177S 115 873E 88km5.2mb ( 24 obs.)SOUTH OF BALI. INDONESIACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 20S, 25CCentroid Location:Or i gi n T ime 15:33: 6.2 1.0Lot 9.24S 0.09 Lon 115.82E 0.10Dep 98.5 6.3 Ha If-duratian 1.4Pr i nc i pa I Axes:

Scale 10««16 NmT Vol- 6.16 Pig-41 Azm-176 N -1.16 35 303 P -5.00 29 56

Best Double Couple Mo-5 6*10**16 NP1:Strike-198 Dip-36 Slip- 168 NP2: 298 83 55

28 07 39 53.96 28.787S 176.620W 51km 4.9mb ( 17 obs ) 5 3Msz ( 9 obs.) KERMADEC ISLANDS REGION CENTROID. MOMENT TENSOR (HRV) Doto Used: GDSN L.P.B.: 34S. 69C Centroid Location:Origin Time 07:39:58.0 0.3Lat 28.57S 0.04 Lon 176.34W 0.04Dep 16.0 2.3 Ho If-duration 1.8Pr i nc i pa I Axes:

Scale 10*.17 NmT Val- 1.81 Pig-62 Azm-258N 0.25 8 3P -2.06 27 97

Best Double Coup Ie:Mo-1 .9*10*»17NP1:Strike-205 Dip-20 Slip- 113NP2: 0 72 82

28 23 33 52.90 62 922S 159 578W 10km 5.1mb ( 6 obs.) 5 4Msz ( 2 obs )PACIFIC-ANTARCTIC RIDGE CENTROID, MOMENT TENSOR (HRV)Dato Used GDSN L.P B.. 26S, 41C

Centroid Location:Or igi n T ime 23:33:55 3 0.3Lat 62.80S 0.05 Lon 160.57W 0.12Dep 15.0 FIX Half-duration 1.3Pr i nc i pa I Axes.

Seale 10»»17 NmT Val- 1.80 Pig-19 Azm-348N -0 03 52 232P -1.77 31 90

Best Double Coup Ie:Mo-1 .8«10** 17NP1:Strike-126 Dip-53 Slip- -10NP2: 221 82 -143

29 03 46 10.00 11 026S 118.385E 40km5.5mb ( 37 obs )SOUTH OF SUMBAWA, INDONESIACENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 31S, 53CCent ro i d Loco tionOrigin Time 03.46: 9 4 0.3Lat 11.34S 0.02 Lon 118 59E 0.04Dep 27.9 2.0 Ha I f-durotion 1.2Pr i nc i pa I Axes.

Scale 10» » 1 7 Nm T Val- 1.12 Pig- 0 Azm-184 N -0.10 0 94 P -1.03 90 180

Best Double Coup Ie:Mo-1 . 1 « 1 0«* 17 NP1:Strike-274 Dip-45 Slip- -90 NP2: 94 45 -90

29 07 07 11.58 60.437S 152.775E 10km 4.8mb ( 10 obs.) 5.8Msz ( 28 obs ) WEST OF MACOUARIE ISLAND CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B . 48S, »«C Cen t ro i d Loco t ionOrigin Time 07.07:24.8 0.1 Lot 60 92S 0 01 Lon 153 61E 0 03 Dep 15.0 FIX Ho I f-durotion 3.8 Principal A xes

ScoIe 10« »18 NmT Vol- 4 35 Pig-11 Azm- 19 N -0 40 64 267 P -3 95 23 114

Best Double Couple Mo-4.2»i0< 18

NP1:Strike-155 Dip-66 Slip- -9 NP2: 249 81 -156

30 23 47 33.94 20.836S 172.957E 13km 5.9mb ( 55 obs ) 6.7Msz ( 46 obs.) VANUATU ISLANDS REGION FAULT PLANE SOLUTION: P-Waves NP1:Strike- 70 Dip-83 Slip- 10 NP2: 339 80 173

P r i nc i pa I Axes:T Pig-12 Azm-295 P 2 20+

Comment: The focal mechanism is moderately well controlled and corresponds to strike slip faulting with a small reverse component. The preferred fault plone is not determined.

RADIATED ENERGYNo. of sta: 10 Focal mech. F Energy 7.7±2.0«10» 1 4 Nm

MOMENT TENSOR SOLUTION Dep 13 No. of sto: 23 Princ i pa I Axes:

Scole 10*«19 NmT Vol- 1 29 PIg- 8 Azm-287N -0 05 81 94P -1.24 2 197

Best Double Coup Ie.Mo-1.3*10»« 19NP1:Strike-332 Dip-83 Slip- 175NP2: 62 85 7

CENTROID, MOMENT TENSOR (HRV)Data Used: GDSNL.P.B.: 46S, **C M.W.: 39S, 88C Cent ra i d Loca t i on:Origin Time 23:47:42.5 0.1Lot 20.72S 0.01 Lon 173.05E 0.01Dep 15.0 FIX Half-duration 5.9Pr i nc i pa I Axes:

Scole 10*»19 NmT Vol- 1.32 Pig-12 Azm-103N -0.13 75 317P -1.20 8 195

Best Double Coup Ie:Mo-1.3»10»* 19NP1 Strike-239 Dip-76 Slip- 3NP2. 148 87 166

Corrected Entry to the May 1992 Monthly Listing

The event of Moy 19, 1992 ot 15:31-08 6 UTC has been recomputed ond should read:

REGION, CONTRIBUTED MAGNITUDES AND COMMENTSy DAY OR IGIN TIMEE UTCr HR MN SEC

19


LAT LONG

15 30 42 6? 19.47 N 176.32

DEPTH MAGNITUDES SD NO.GS STA

MB Msz USED

282 ? 4.6 0.8 32 FIJI ISLANDS REGION

Compiled by Pingsheng Chang, Will is S. Jacobs, Stuart K. Koyanogi, Christina K. Lavonne, John H. Minsch, Russell E Needhom, Woverly J. Person, Bruce W. Presgrove ond William H. Schmieder.

04 June 1993 10:49:33 65 North of Halmahera, Indonesia

SSE (LHZ)P x5

TATO (LHZ)P x2

ENH (LHZ)P x5

LZH (LHZ)P x7

QIZ (LHZ)F xl

KMI (LHZ)P x3

CHTO (BHZ)P x2

LSA (LHZ)P x4

HIA (LHZ)P xlO

WMQ (BHZ) y

M and B0 1 2

Time (min)

NWAO (LHZ)P x2

MDJ (LHZ)P xll

MAJO (LHZ)P x8

(LHZ)

GUMO (LHZ)P xl

COL (BHZ)P x2

KIP (LHZ)P x4

SNZO (LHZ)P x4

CTAO (LHZ)P x2

TAU (LHZ)P x3

01234

Time (min)

06 June 1993 13:23:20.86 Mariana Islands

MAJO (LHZ)P

MDJ (LHZ)P x2

SSE (LHZ)P x2

XAN (LHZ)P x2

LSA (LHZ)P x2

QIZ (BHZ)Fxl

CHTO (LHZ)P x2 V '

PAB (LHZ)Pdiff x33

NWAO (LHZ)P x2

YSS (LHZ)P x3

20M and B KONO (LHZ)

Pdiff xlO0 1 2

Time (min)

20

COL (LHZ)

GOL (LHZ)P xlO

~^/\|\A/WW USC (LHZ)

KIP (LHZ)P x6 V

Vl/^WW BDF (LHZ)

RAR (LHZ)P x6

TAU (LHZ)P x3

CTAO (LHZ)P x3 V '

01234

Time (min)

PAGE 29

08 June 1993 13:03:36.48 Near East Coast of Kamchatka

HRV (LHZ)P x8

TBT (LHZ)Pdiff x!8

PAB (LHZ)P x6

CHTO (LHZ)P x4

XAN (LHZ)P x4

MDJ (LHZ)P xl

NWAO (LHZ)P xl4

MAJO (LHZ)P XI

GUMO (LHZ)P x!4

CCM (LHZ)P xlO

COL (BHZ)P x6

ANMO (LHZ)P x8

WDC (BHZ)P x6 '

TUC (BHZ)P x8

PFO (LHZ)P x8

KIP (LHZ)P x6

0 1 2

Time (min)

RAR (LHZ)P x!4

PMSA (LHZ)PKPdf xlD

0 J Z 3 4 Time (min)

08 June 1993 23:17:41.44 San Juan Province, Argentina

SJG (BHZ)P xl

HRV (LHZ)P

CCM (LHZ)

WMOK (BHZ)P xl '

TUC (LHZ)P x4 V

GSC (LHZ)P x4

PFO (LHZ)P x4

USC (LHZ)

RPV (LHZ)P x4

JOM and B

0 1 2

Time (min)

SNZO (LHZ)P x3

10

YSS (LHZ)PKPdf x3

TBT (LHZ)P x3 v

(LHZ)LZH (BHZ)PKPdf xl

BOSA (LHZ)P x4

BOSA (BHZ)P xl

CHTO (BHZ)PKPdf x£

PMSA (LHZ)P xl

01234Time (min)

PAGE 36

12 June 1993 05:45:21.21 Solomon Islands

YSS (BHZ)P x2

(LHZ)MAJO (BHZ)P x3

GUMO (LHZ)P x3

MDJ (LHZ)P x6

SSE (LHZ)P x6

TATO (LHZ)P x5

KMI (LHZ)P x9

CTAO (LHZ)P xl

RSSD (LHZ)Pdiff x26

ENH (LHZ)P x8

CMB (LHZ)P x6

PAB (LHZ)PKPdf x4

TBT (LHZ)PKPdf x9

SNZO (LHZ)P x2

LZH (LHZ)P x9

M and B0 1 2

Time (min)

LSA (LHZ)P xlO

01234

Time (min)

12 June 1993 20:33:25.70 Near East Coast of Kamchatka

LSA (LHZ)P x7

H1A (BHZ)P x2

HIA (LHZ)P x3

LZH (LHZ)P xlO

MDJ (LHZ)P x2

YSS (LHZ)Pn xl

XAN (LHZ)P x9

0 1 2

Time (min)

KMI (LHZ)P x?

KONO (LHZ)P xl2

COL (LHZ)P x!3 '

JFWS (BHZ)P x6

WDC (BHZ)P x6 V

ENH (BHZ)P

ENH (LHZ)P x8

CTAO (LHZ)P x!4

01234

Time (min)

PAGE 31

18 June 1993 17:57:46.61 Kermadec Islands Region

KONO (LHZ)PKPdf

MAJO (BHZ)P x5 '

HIA (LHZ)Pdiff xl6

SSE (BHZ)P x4

XAN (LHZ)P x9

LZH (LHZ)Pdiff x

KMI (BHZ)P xlO

50-

3. 0-

PAB (LHZ)PKPdf

M and Bo i z

Time (min)

COL (LHZ)Pdiff xS3

TUC (LHZ)P x!4

50

COR (LHZ)P xl?

CMB (LHZ)P xl6

ISA (LHZ)P x!4

RAR (LHZ)P xl

SBC (LHZ)P x9

PAS (LHZ)P x9

RPV (LHZ)P xll

NEE (LHZ)P x?

PFO (LHZ)P x!3 V '

0 1 Z 3 4

Time (min)

30 June 1993 23:47:33.94 Vanuatu Islands Region

MAJO (LHZ)P xl4

ENH (LHZ)P x!9

QIZ (LHZ)P x8

KMI (LHZ) __A/\/\A^P xl6 \J \J ^^

CHTOP x?

CTAO (LHZ)P x2

NWAO (LHZ)

TAU (LHZ)P x5

M and B0 1 Z

Time (min)

SNZO (LHZ)P xl

(BHZ)

(LHZ)

GOGA (LHZ)Pdiff x]62

LZH (LHZ)P x30

LSA (LHZ)P x29

SPA (LHZ)P x6 V '

30

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Earthquake epicenters in A

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