HR: 1340h
AN: G33A-0024    [Abstracts]
TI: Application of a Gravity Green's Function Method Using a Stress-evolution Earthquake Simulation of California
AU: * Hayes, T
EM: thayes@uwo.ca
AF: The University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7 Canada
AU: Tiampo, K
EM: ktiampo@uwo.ca
AF: The University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7 Canada
AU: Rundle, J B
EM: jbrundle@ucdavis.edu
AF: University of California, Davis, One Shields Avenue, Davis, CA 95616 United States
AB: Using a stress-evolution time-dependent model, simulated slip histories were created for the San Andreas Fault network in California. From the slip histories created, and through the use of gravity Green's functions, we generated a time-dependent model of the gravity evolution over the San Andreas Fault network. The model includes gravity effects from the underlying tectonic plate loading, as well as the gravity chnages from the sudden strain release during seismic events. Moreover, the method is general enough to include effects from faults with arbitrary dip and orientation in the fault network. The complex fault geometry contributes significantly to the spatial distribution of the various gravity signals observed while the signal magnitude is constrained by the amount slip modeled. The gravity signal over long periods exhibit highly complex signals; potentially highlighting directly observable regions of seismic susceptibilty prior to large earthquakes.
DE: 1209 Tectonic deformation (6924)
DE: 1217 Time variable gravity (7223, 7230)
DE: 1242 Seismic cycle related deformations (6924, 7209, 7223, 7230)
SC: Geodesy [G]
MN: Fall Meeting 2005