HR: 09:15h
AN: G41A-06    [Abstracts]
TI: GPS Seismology and Earthquake Early Warning along the Southern San Andreas Fault System
AU: Bock, Y
EM: ybock@ucsd.edu
AF: Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093-0225, United States
AU: * Jackson, M E
EM: jackson@unavco.org
AF: UNAVCO, Inc., 6350 Nautilus Drive, Boulder, CO 80301, United States
AB: We are in the process of upgrading CGPS stations in southern California to high-rate (1-10 Hz) real-time (latency < 1 s) operations. Currently we have about 60 upgraded SCIGN and PBO stations that straddle the San Andreas Fault System south of the Big Bend in southern California and cover the three major faults (San Andreas, San Jacinto and Elsinore). Our next major upgrade will include 12 PBO stations in the Imperial Valley straddling the Imperial and Cerro Prieto faults, the region of highest strain rate in southern California and the narrowest part of the North America-Pacific plate boundary. South of the Big Bend, the zero velocity contour (the "boundary") between the North America and Pacific plates does not follow the SAF segment, but rather is located just east of the San Jacinto Fault (SJF) segment and then follows the Imperial and Cerro Prieto faults. The primary purpose of the real-time network is to serve as an early warning system for a large earthquake along the southern San Andreas Fault System by quickly measuring coseismic displacements, and also for GPS seismology to rapidly measure the associated dynamic displacements. The network, called the California Real Time Network (CRTN), also supplies data for real GPS surveys within the region and will provide rapid displacement waveforms to the SCEC data archive at Caltech in the event of a medium to large earthquake. Although the real-time data flow is currently at 1 Hz, the PBO stations have an internal buffer that records GPS data at a 10 Hz rate.
UR: http:sopac.ucsd.edu/projects/realtime/
DE: 6924 Interferometry (1207, 1209, 1242)
DE: 7223 Earthquake interaction, forecasting, and prediction (1217, 1242)
DE: 7230 Seismicity and tectonics (1207, 1217, 1240, 1242)
DE: 7294 Seismic instruments and networks (0935, 3025)
SC: Geodesy [G]
MN: 2007 Joint Assembly