Fracture surface energy of the Punchbowl fault, San Andreas system

Judith S. Chester (), Frederick M. Chester and Andreas K. Kronenberg
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Judith S. Chester: Texas A&M University
Frederick M. Chester: Texas A&M University
Andreas K. Kronenberg: Texas A&M University

Nature, 2005, vol. 437, issue 7055, 133-136

Abstract: The Devil's fault The energetics of earthquake rupture, slip-weakening and rupture surface formation are poorly understood. By measuring the energy associated with fracture damage along the Punchbowl fault in the Devil's Punchbowl Los Angeles County Park, part of the San Andreas system, Chester et al. show that the fracture surface energy for rupture along a mature fault of this type accounts for only a small fraction of the energy released during large earthquakes as determined by seismologists. This suggests that mechanisms such as melt lubrication and thermal pressurization are responsible for slip weakening.

Date: 2005
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DOI: 10.1038/nature03942

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