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Authors: Piatanesi, A.* 
Tinti, E.* 
Cocco, M.* 
Fukuyama, E.* 
Title: The dependence of traction evolution on the earthquake source time function adopted in kinematic rupture models
Journal: Geophysical Research Letters 
Series/Report no.: / 31 (2004)
Publisher: American Geophysical Union
Issue Date: 2004
DOI: 10.1029/2003GL019225
Keywords: Earthquake dynamics and mechanics
Earthquake parameters
Theory and modeling
Subject Classification04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics 
Abstract: 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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