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Earth Surface & Interior

Numerical simulation using finite element models is a key method to study time-dependent tectonic deformation mechanisms. Geodetic data are essential for testing model results for accuracy and realism. California provides a rich test environment for simulating tectonic processes, as it has good existing regional geodetic coverage by continuous GPS networks recording crustal deformation and it includes a variety of tectonic regimes. We propose to conduct numerical simulations of crustal deformation processes in northern and southern California using the Geophysical Finite Element Simulation Tool (GeoFEST) and comparing results with available geodetic observations from the Bay Area Regional Deformation (BARD) network and the Southern California Integrated GPS Network (SCIGN). We will accomplish this by modeling (1) the strike-slip tectonic regime of the Bay Area, (2) the shortening and strain partitioning on faults in the Los Angeles Basin, (3) the stress transfer and loading of faults by recent earthquakes in the Ventura Basin region, and (4) studying the interaction of various faults in southern California and how stress transfer among these affects the earthquake cycle, and studying how space-borne observations relate to model results. This proposal falls under two of the three Earth Surface and Interior Thematic Areas: Land Surface Change and associated Natural Hazards and Space Geodesy and deals with two questions posed by the Earth Science Research Program dealing with variability and prediction. It also addresses of two of the questions posed by the SESWG report, Living on a Restless Planet, regarding the nature of deformation at plate boundaries and the implications for earthquake hazards the dynamics of the mantle and crust and the Earth's response. The proposal also addresses three of six observational strategies to address fundamental Solid Earth questions: surface deformation, high-resolution topography, and space geodetic networks.

Project PI: Gregory Lyzenga/Jet Propulsion Laboratory

Jet Propulsion Laboratory M/S 126-347 4800 Oak Grove Drive Pasadena, CA 91109

Phone: (818)354-6920

Fax: (818)393-6141

Email: Gregory.A.Lyzenga@jpl.nasa.gov

http://science.jpl.nasa.gov/people/Lyzenga/

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Started: Aug 09, 2010

Last Activity: Mar 17, 2011

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