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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

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
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
why was trinet needed
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
network upgrades under trinet
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
trinet products
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
near real time notification
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
shakemap
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
trinet shakemap for tv
TriNet ShakeMap for TV
  • Currently Available
  • Very Simple Format
  • TV News Gave Input
  • Move Beyond Epicenter
  • Avoid Confusion Between Magnitude and Intensity
loss estimation outputs
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
trinet earthquake early warning
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
social scientific and public policy studies
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)
post trinet status
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
post trinet status of early warning
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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