The dependence of traction evolution on the earthquake source time function adopted in kinematic rupture models

Details The dependence of traction evolution on the earthquake source time function adopted in kinematic rupture models The dependence of traction evolution on the earthquake source time function adopted in kinematic rupture models

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3104609p&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 4, CiteID L04609

Physics

11

Seismology: Earthquake Dynamics And Mechanics, Seismology: Earthquake Parameters, Seismology: Theory And Modeling, Tectonophysics: Dynamics, Seismotectonics

Scientific paper

We compute the temporal evolution of traction by solving the elasto-dynamic equation and by using the slip velocity history as a boundary condition on the fault plane. We use different source time functions to derive a suite of kinematic source models to image the spatial distribution of dynamic and breakdown stress drop, strength excess and critical slip weakening distance (Dc). Our results show that the source time functions, adopted in kinematic source models, affect the inferred dynamic parameters. The critical slip weakening distance, characterizing the constitutive relation, ranges between 30% and 80% of the total slip. The ratio between Dc and total slip depends on the adopted source time functions and, in these applications, is nearly constant over the fault. We propose that source time functions compatible with earthquake dynamics should be used to infer the traction time history.

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