Date post: | 23-Dec-2015 |
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San Andreas fault 35 mm/yr slip rate;
>70% of plate motion 1685, 1857 eq’s
SoCal is now well ‘wired’
Likely source of most future ‘Big Ones’
Fault physics experiment GPS/INS in near-field ALSM & DG scan ‘net’
Great place to test EEW
Build “zipper” arrays Cholame - Simmler Coachella Valley
Lone Juniper Ranch and Frazier Park High School
First prototype GPS fault slip sensor; up to 10 Hz (Hudnut et al., 2002)
Spans the San Andreas fault near Gorman, California
San Andreas - place two betsboth ~120 km from Los Angeles (LA)
Coachella Valleysegment is ~60 kmto San Bernardino
•Satellite
•Telemetry
•Internet
SENSOR PACKAGE
-Accelerometer-Tiltmeter-GPS sensor
REAL-TIME DAMAGE ASSESSMENT
Courtesy ofErdal Safak (USGS)
Another technological advancefor rapid earthquake
information message delivery
Cell phones with GPS open possibility of ‘smart’ SMS real-time warning targeted to at-risk mobile users (outdoors) or mobile platforms (e.g., while in their cars)
[currently not feasible due to power requirements, if GPS is on all the time]
Maps2MEFutureRoads
Summary Slip sensor concept is to augment regional seismic coverage - one part of an
overall EEW system that is primarily using a very different approach
Measure slip directly - don’t need to know anything else - ‘quick & easy’
High risk deployment strategy tuned to rare pay-off in extreme events
Robust earthquake early warning system design obtain more accurate displacement observations new instrumentation for dynamic and static displacement address
deficiencies due to double-integration of accelerometer records
Same R&D effort as for DamageMap instrumentation - now under way with USGS Venture Capital and ANSS start-up funds, but major funding and long-term support for implementation has not yet been identified