August 14, 2006

Seismic Monitoring Seismic Monitoring in the Utah Region in the Utah Region

— Status and Needs — Status and Needs

Walter ArabaszWalter Arabasz

How We Got Where We How We Got Where We AreAre

1971 — Small state line-item appropriation secured

1983-88 — NEHRP focus on Wasatch Front area, but no funds for modernizing seismic network

1989 — Legislative blue-ribbon panel convened: “What EQ instrumentation is needed in Utah?” $2.7 million recommended

1990-94 — After four tries , gained only $75K/yr increase in state line-item from legislature

Turned to national arena to plan, fund & build ANSS

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First...First...

How We Got Where We How We Got Where We Are Are (cont’d)(cont’d) FY2000 — Language in President’s budget asking for $800K for

EQ instrumentation in San Francisco; $400K, Seattle, $400K, Salt Lake City . . . Funding gained with help of Utah Senator Bennett

FY2001-02 — Added ANSS funds gained to build urban SM network and basic, end-to-end real-time EQ info system in Wasatch Front urban corridor before 2002 Winter Olympics (automated alarms, locations, ShakeMaps, with dual Earthworm systems)

Since mid 1970’s, state-federal partnership for seismic monitoring in Utah with ~ 40% annual state contribution

What’s in Place...What’s in Place...

UUSS Regional/Urban Seismic NetworkUUSS Regional/Urban Seismic NetworkRegional short-period/broadband net

221 stations534 channels

Urban

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etwork

Example UUSS StationsExample UUSS Stations

Regional station, rock site

Urban station, open ground

Urban station, small building

Numbers for Utah RegionNumbers for Utah Region

160 stations (424 channels)

85 SM, 58 SP, 17 BB

70 urban SM stations plus 5 BB/SM stations in the Wasatch Front area

10 urban SM stations outside WFA

ShakeMap ShakeMap ininUtah RegionUtah Region

ShakeMaps in Wasatch ShakeMaps in Wasatch Front Area in 2001Front Area in 2001

ShakeCast for rapid ShakeCast for rapid integration into HAZUS integration into HAZUS implemented in 2005implemented in 2005

ShakeMap capability ShakeMap capability expanded to entire Utah expanded to entire Utah region in 2005 region in 2005

18 ShakeMap scenarios 18 ShakeMap scenarios onlineonline

Thanks to Kris Pankow!

Co-operative project:ANSS, NSMP, UUSS, Utah Geol. Survey,Utah OES

What Else is in Place?What Else is in Place?

Uncommonly strong state earthquake program (solid partnership between UU Seismograph Stations, Utah Geological Survey, and Utah Office of Emergency Services)

Strong support from Utah Seismic Safety Commission, created in 1994 by state legislature

State-level, 12-member ANSS advisory committee for urban strong-motion monitoring

Prioritized NeedsPrioritized Needs

1. Software development and support from ANSS

2. More BB stations in seismically active parts of Utah with poor seismographic coverage

3. More stations (both regional and urban SM) in dramatically growing St. George-Cedar City area in SW Utah and in other seismically active parts of rural Utah) Currently pursuing Currently pursuing through an initiative to the Utah through an initiative to the Utah Legislature (handout)Legislature (handout)

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Prioritized Needs (cont’d)Prioritized Needs (cont’d)

4. Upgraded computer hardware to ensure reliable data recording, given increased number of stations/channels recorded

5. Partial re-engineering of telemetry (including links to NEIC) to guarantee continuity of data recording/processing in event of a large Wasatch Front EQ

6. More SM stations in the Wasatch Front urban corridor