Dynamic rupture along bimaterial interfaces in 3D

Details Dynamic rupture along bimaterial interfaces in 3D Dynamic rupture along bimaterial interfaces in 3D

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3411305b&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 11, CiteID L11305

Statistics

Computation

8

Seismology: Earthquake Dynamics (1242), Seismology: Computational Seismology

Scientific paper

We perform numerical simulations of dynamic rupture propagation on a plane in a model consisting of two different elastic half spaces connected via a planar frictional interface governed by regularized Coulomb friction. Therefore, ruptures in this study are purely driven by the presence of a material contrast. Ruptures are nucleated on the fault using a circular symmetric expanding increase of pore-pressure in a limited source region. We show how a wrinkle-like rupture pulse can mature also in the 3D case where we have a mixing of in-plane and anti-plane modes, the instability specific of a bimaterial interface acting only for the in-plane mode. The pulse develops inside a cone-shaped region with its axis aligned with the direction of displacement in the softer material, its tip being at the nucleation region.

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