Nonlinear dynamics, granular media and dynamic earthquake triggering

Paul A. Johnson () and Xiaoping Jia
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Paul A. Johnson: Los Alamos National Laboratory of the University of California
Xiaoping Jia: Université de Marne-la-Vallée, CNRS UMR 8108, Cité Descartes

Nature, 2005, vol. 437, issue 7060, 871-874

Abstract: Trigger action The Landers earthquake of 1992 triggered a series of earthquakes in other parts of California, focusing attention on the mechanism of remote triggering. Laboratory experiments on granular material under pressure suggest that triggering is a result of seismic waves impinging on a fault and inducing elastic nonlinear behaviour of the fault core, accompanied by instantaneous weakening and failure. The resulting ‘softening-to-weakening’ model fits in well with field observations of real earthquakes.

Date: 2005
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DOI: 10.1038/nature04015

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