Site Classification of Newly Deployed Strong Motion Stations in the Eastern Mediterranean

A New Strong-Motion Network in the Eastern MediterraneanAsst. Prof. M.Tolga YlmazAsst. Prof. Zehra CagnanMiddle East Technical UniversityORFEUS Observatory Coordination Workshop12-14 November 2012 stanbul, TURKEY

Main Tectonic Structures in the Eastern Mediterranean

2Seismic Hazard Assessment for Cyprus and Neighbouring Regions ProjectDevelop the first strong motion network for North Cyprus comprised of 13 instrumentsDevelop regional ground motion attenuation relationships and carry probabilistic seismic hazard assessment

CEN (2007) National Annex to Eurocode 8 3Site Selection for the Network

Distribution of 2511 M>4.0 events that took place between 2150 BC and 2009.4Site Selection for the NetworkSurface Geology Map of Cyprus (Geological Survey Department of Cyprus,1995)

SRTM90m based slope data5Site Selection for the Network

6Final Network Sites

7Shallow Seismic and Geotechnical Surveys at KT006

8S-wave Velocity Surveys near KT006 by MASW

9Diagram for the Seismic Recording System24-channelGeode 1recording unit24-channelGeode 2recording unit47-m receiver cable1244848 4.5-Hz vertical geophones at 1-m intervalsA1A2B1B2C1C2batterybattery

.*Record 1 shot point*Record 2 shot pointRecord 3 shot pointLaptop2510Shot Records for KT006

11S-wave Velocity Profile of upper 30 m for KT006

12Geotechnical Surveys near KT006

13Comparison of Velocity Profile and Penetration Resistance at KT006

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Site Classification according to Vs30KT001 NEHRP C KT005 NEHRP C KT006 NEHRP C KT007 NEHRP C KT008 NEHRP D KT009 NEHRP C KT010 NEHRP C KT012 NEHRP D KT004 NEHRP C KT002KT003KT011KT01315

Types of the Instruments: GuralpCMG-5TCDECMG-5TCDECMG-5TCDE CMG-5TCDE CMG-5TCDE CMG-5TDCMG-5TCDE CMG-5TCDE CMG-5TCDE CMG-5TDCMG-5TDCMG-5TDCMG-5TCDE16Housing of the Instruments

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Communication with the InstrumentsADSLEDGEEDGEEDGEEDGEEDGEADSL ADSL EDGE ADSLADSLADSLEDGEMETU-NCC18First Record: 26.09.2012 EarthquakeTime: 01:28:28 GMT (KOERI) Magnitude: 4.6 Mw (USGS) Depth: 12.4 km (KOERI)

19Record Processing(Akkar and Bommer, 2006; Akkar et al., 2011)

20Comparisons

NEHRP CNEHRP D

26 Sep. 2012Other eventsFaults26.09.2012 Data26.09.2012 DataPGA(gal)Epicentral Distance (km)Epicentral Distance (km)PGA(gal)21

26.09.2012 Data26.09.2012 Data26.09.2012 Data26.09.2012 Data26.09.2012 Data26.09.2012 DataPGAPGASA 0.2snSA 0.2snSA 1.0snSA 1.0sn22

Thanks for your attention