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Título

Gravity changes from a stress evolution earthquake simulation of California

AutorHayes, T. J.; Tiampo, Kristy F.; Rundle, J. B.; Fernández Torres, José
Palabras claveGeodesy
Geodesia
Gravity
Gravedad
Earthquakes
Terremotos
Simulations
Simulaciones
California
Seismology
Computational geophysics
Nonlinear geophysics
Fecha de publicaciónsep-2006
EditorAmerican Geophysical Union
CitaciónJournal of Geophysical Research, 111, B09408 (2006)
ResumenThe 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 μGal; the current limit of portable instrument observations. Moderate to large events generate signal magnitudes in the range of ~10 to ~80 μGal, 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.
Versión del editorhttp://dx.doi.org/10.1029/2005JB004092
URIhttp://hdl.handle.net/10261/25968
DOI10.1029/2005JB004092
ISSN0148-0227
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