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The TriNet Project: 1997-2001

The TriNet Project: 1997-2001. James D. Goltz Ph.D. Earthquake and Tsunami Program Governor’s Office of Emergency Services May 26, 2006. What was TriNet?. TriNet was a collaboration between Caltech, USGS and CDMG (now CGS)

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The TriNet Project: 1997-2001

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  1. The TriNet Project: 1997-2001 James D. Goltz Ph.D. Earthquake and Tsunami Program Governor’s Office of Emergency Services May 26, 2006

  2. What was TriNet? • TriNet was a collaboration between Caltech, USGS and CDMG (now CGS) • Build a state-of-the-art digital seismic network in southern California • Goals: • Improve our understanding of earthquakes • Improve building codes and structural design • Facilitate emergency response • CISN is an effort to extend TriNet statewide

  3. Why was TriNet Needed? • Southern California Seismic Network (SCSN) was in need of upgrading • The SCSN performed poorly during the Northridge earthquake of January 17, 1994 • There was pressure from those dependent on the network for response information • FEMA’s Hazard Mitigation Grant Program provided a potential vehicle for implementation

  4. Network Upgrades Under TriNet • Station installation (new installation or upgrade of 600 stations in Southern CA) • Data communications (real-time telemetry) • Software development • Information distribution & archiving • Knowledge and technology transfer (Outreach) • Consider feasibility of early alert system • Compile data useful for building codes

  5. TriNet Products • Accurate, Reliable and Rapidly Available Source Data (e.g. magnitude, location, depth, focal mechanism) • ShakeMap (mapped ground motion) • ShakeMap/HAZUS Interface • Groundwork for Earthquake Early Warning

  6. Near Real-Time Notification • New network made accurate, reliable and timely notifications possible for small and large EQs • Developed new software to replace CUBE/REDI technology • Under TriNet, groundwork established for “CISN” Display • CISN Display is an Internet based real-time EQ notification technology and gateway to other rapidly available EQ information

  7. CISN Display

  8. Product Links

  9. Earthquake Information via Pager

  10. ShakeMap • One of TriNet’s first products • First map produced 3-17-97 • Displays the distribution of ground shaking • Shows intensity, velocity, acceleration • Maps available on the Internet • Very rapid availability, within 5 minutes • Maps generated for events  M3.5 • Can be used to generate scenarios for exercises

  11. ShakeMap for Large Event: Hector Mine Earthquake of 10-16-99, M7.1

  12. ShakeMap for Small Event, Near Petrolia3-25-06, M4.6

  13. TriNet ShakeMap for TV • Currently Available • Very Simple Format • TV News Gave Input • Move Beyond Epicenter • Avoid Confusion Between Magnitude and Intensity

  14. HAZUS Multi-Hazard

  15. Loss Estimation Outputs • Shaking intensity by census tract or zip code • Casualties (Deaths and Injuries) • Displaced individuals or households • Building damage/losses • Lifeline damage/losses • Critical facility Impacts • Debris generated

  16. TriNet Earthquake Early Warning • One of TriNet’s Goals: develop a pilot earthquake early warning project in southern CA • New network was designed to facilitate incorporation of early warning • Studies carried out on two levels: • Scientific and engineering technical feasibility explored • Sociological and public policy implications examined • Progress made under TriNet but not pilot project originally envisioned

  17. Social Scientific and Public Policy Studies • Literature review for a comprehensive assessment of warning systems for natural hazards and behavioral response to warnings (DRC, University of Delaware) • Survey of organizations likely to become the users of an earthquake early warning system (SRC and School of Public Health, UCLA) • Policy study to consider costs and benefits, legal liabilities, organization and management of an early warning system (EQE International) • Outline of a pilot project to introduce early warning in southern California (EQE International)

  18. Post-TriNet Status • CISN succeeded TriNet with several objectives: • Maintain Dense “TriNet” Southern California Network • Expand Northern California/Bay Region Network • Expand Northern and Central California Rural Coverage • Provide Redundant Processing and Communication • Carry Out a Program of Outreach and Technology Transfer • Carry on Development of an Early Warning Capability • CISN operates with oversight from 5 participating institutions: CA OES, USGS, CGS, Caltech and UCB

  19. Post-TriNet Status of Early Warning • The pilot project envisioned under TriNet was not initiated: • Policy analysis revealed potential legal liabilities for involvement of Caltech (or other private sector entities) in providing warnings • There remained scientific and engineering work to be done in the rapid analysis of an evolving earthquake sequence • A consensus failed to emerge regarding the division of labor among agencies likely to be involved • Some but not all of these issues have been addressed since TriNet concluded

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