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Authors: Bizzarri, A.*
Title: Pulse‐like dynamic earthquake rupture propagation under rate‐, state‐ and temperature‐dependent friction
Title of journal: Geophysical Research Letters
Series/Report no.: /37(2010)
Publisher: AGU
Issue Date: Sep-2010
DOI: 10.1029/2010GL044541
Keywords: Temperature
Numerical models
Abstract: Healing of faults is an important process in earthquake source physics since it accounts for a rapid restrengthening of the fault traction and for a consequent short slip duration, as indicated by slip inversions of seismic data. In this paper we show that a laboratory‐derived constitutive model, with an explicit dependence on the temperature developed by frictional heat, can provide a suitable explanation for the generation of self‐healing slip pulses. The model requires neither special modifications at low or high speeds nor the introduction of heterogeneities in the material properties, as previously proposed. We also demonstrate through numerical experiments of 3‐D ruptures that the temperature evolution can discriminate between crack‐like and slip pulses mode of propagation. In particular, we find that for a moderate level of strain localization (slipping zone width larger than 20 mm) ruptures behave as classical enlarging cracks.
Description: An edited version of this paper was published by AGU. Copyright (2010) American Geophysical Union.
Appears in Collections:04.06.03. Earthquake source and dynamics
Papers Published / Papers in press

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