Postseismic Relaxation Along the San Andreas Fault at Parkfield from Continuous Seismological Observations
Centre National de la Recherche Scientifique · Institut de physique du globe de Paris · +2 more institutions
Abstract
Seismic velocity changes and nonvolcanic tremor activity in the Parkfield area in California reveal that large earthquakes induce long-term perturbations of crustal properties in the San Andreas fault zone. The 2003 San Simeon and 2004 Parkfield earthquakes both reduced seismic velocities that were measured from correlations of the ambient seismic noise and induced an increased nonvolcanic tremor activity along the San Andreas fault. After the Parkfield earthquake, velocity reduction and nonvolcanic tremor activity remained elevated for more than 3 years and decayed over time, similarly to afterslip derived from GPS (Global Positioning System) measurements. These observations suggest that the seismic velocity…
Citation impact
- FWCI
- 25.24
- Percentile
- 100%
- References
- 24
Authors
6- FBFlorent BrenguierCorresponding
Centre National de la Recherche Scientifique, Institut de physique du globe de Paris, Université Joseph Fourier, University of California, Berkeley
- MCMichel Campillo
Centre National de la Recherche Scientifique, Institut de physique du globe de Paris, Université Joseph Fourier, University of California, Berkeley
- CHCéline Hadziioannou
Centre National de la Recherche Scientifique, Institut de physique du globe de Paris, Université Joseph Fourier, University of California, Berkeley
- НМН. М. Шапиро
Centre National de la Recherche Scientifique, Institut de physique du globe de Paris, Université Joseph Fourier, University of California, Berkeley
- RMR. M. Nadeau
Centre National de la Recherche Scientifique, Institut de physique du globe de Paris, Université Joseph Fourier, University of California, Berkeley
Topics & keywords
- San andreas fault
- Seismology
- Geology
- Seismic velocity
- Fault (geology)
- Seismic noise
- Elastic-rebound theory
- Sustainable cities and communities