HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Shear and normal load perturbations on a two-dimensional continuous fault: 2. Dynamic triggering

Abstract : We study the consequences of temporal stress perturbations on earthquake nucleation in a continuous fault model. Using a two-dimensional (2-D) quasi-dynamic model of a strike-slip fault governed by a rate-and-state friction law with depth variable properties, we show that dynamic triggering (due to stress pulses or wave packets), although allowed by our results, is an exception rather than a rule and should be limited to understressed areas such as areas of high pore pressures or to faults at the very end of their earthquake cycle. When periodic stress perturbations are sensitive, the response of the fault is frequency-independent for periods lower than a period T0 but strongly depends on the frequency for periods larger than T0. We demonstrate that the crossover period T0 is equal to the time left until the earthquake instability. According to our model, high frequencies are demonstrated to have a higher triggering potential than low ones, which makes tidal triggering very unlikely before the end of the cycle due to the very low amplitudes of the stress perturbations involved.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03607097
Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Sunday, March 13, 2022 - 2:39:32 PM
Last modification on : Thursday, March 17, 2022 - 10:08:29 AM

File

Journal of Geophysical Researc...
Publisher files allowed on an open archive

Licence


Copyright

Identifiers

Collections

Citation

H. Perfettini, J. Schmittbuhl, A. Cochard. Shear and normal load perturbations on a two-dimensional continuous fault: 2. Dynamic triggering. Journal of Geophysical Research : Solid Earth, American Geophysical Union, 2003, 108, ⟨10.1029/2002JB001805⟩. ⟨insu-03607097⟩

Share

Metrics

Record views

37

Files downloads

6