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Detailed Reference Information
Hayes et al. 2006
Hayes, T.J., Tiampo, K.F., Rundle, J.B. and Fernández, J. (2006). Gravity changes from a stress evolution earthquake simulation of California. Journal of Geophysical Research 111: doi: 10.1029/2005JB004092. issn: 0148-0227.

The gravity signal contains information regarding changes in density at all depths and can be used as a proxy for the strain accumulation in fault networks. A stress evolution time-dependent model was used to create simulated slip histories over the San Andreas Fault network in California. Using a linear sum of the gravity signals from each fault segment in the model, via coseismic gravity Green's functions, a time-dependent gravity model was created. The steady state gravity from the long-term plate motion generates a signal over 5 years with magnitudes of ¿~2 ¿Gal; the current limit of portable instrument observations. Moderate to large events generate signal magnitudes in the range of ~10 to ~80 ¿Gal, well within the range of ground-based observations. The complex fault network geometry of California significantly affects the spatial extent of the gravity signal from the three events studied.

BACKGROUND DATA FILES

Abstract

Keywords
Geodesy and Gravity, Time variable gravity (7223, 7230), Seismology, Earthquake dynamics, Computational Geophysics, Cellular automata, Nonlinear Geophysics, Complex systems
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
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