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Detailed Reference Information |
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. |
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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. |
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Abstract |
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Keywords
Geodesy and Gravity, Time variable gravity (7223, 7230), Seismology, Earthquake dynamics, Computational Geophysics, Cellular automata, Nonlinear Geophysics, Complex systems |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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