Postseismic Relaxation Along the San Andreas Fault at Parkfield from Continuous Seismological Observations
作者： F. Brenguier , M. Campillo , C. Hadziioannou , N. M. Shapiro , R. M. Nadeau
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摘要: Seismic velocity changes and nonvolcanic tremor activity in the Parkfield area California reveal that large earthquakes induce long-term perturbations of crustal properties San Andreas fault zone. The 2003 Simeon 2004 both reduced seismic velocities were measured from correlations ambient noise induced an increased along fault. After earthquake, reduction remained elevated for more than 3 years decayed over time, similarly to afterslip derived GPS (Global Positioning System) measurements. These observations suggest are related co-seismic damage shallow layers deep stress change postseismic relaxation within
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