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Seismic Monitoring in the Utah Region — Status and Needs

Seismic Monitoring in the Utah Region — Status and Needs . Walter Arabasz. August 14, 2006. First. How We Got Where We Are. 1971 — Small state line-item appropriation secured 1983-88 — NEHRP focus on Wasatch Front area, but no funds for modernizing seismic network

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Seismic Monitoring in the Utah Region — Status and Needs

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  1. Seismic Monitoring in the Utah Region — Status and Needs Walter Arabasz August 14, 2006

  2. First... How We Got Where We Are • 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 (more)

  3. How We Got Where We Are (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

  4. What’s in Place...

  5. UUSS Regional/Urban Seismic Network Regional short-period/broadband net Urban strong-motion network 221 stations 534 channels

  6. Example UUSS Stations Urban station, small building Regional station, rock site Urban station, open ground

  7. Numbers 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

  8. Thanks to Kris Pankow! ShakeMap in Utah Region • ShakeMaps in Wasatch Front Area in 2001 • ShakeCast for rapid integration into HAZUS implemented in 2005 • ShakeMap capability expanded to entire Utah region in 2005  • 18 ShakeMap scenarios online Co-operative project: ANSS, NSMP, UUSS, Utah Geol. Survey, Utah OES

  9. 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

  10. Prioritized Needs • Software development and support from ANSS • More BB stations in seismically active parts of Utah with poor seismographic coverage • 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 through an initiative to the Utah Legislature (handout) (more)

  11. Prioritized Needs (cont’d) • Upgraded computer hardware to ensure reliable data recording, given increased number of stations/channels recorded • Partial re-engineering of telemetry (including links to NEIC) to guarantee continuity of data recording/processing in event of a large Wasatch Front EQ • More SM stations in the Wasatch Front urban corridor

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