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Power laws, precursors and predictability during failure

De, Rumi and Ananthakrishna, G (2004) Power laws, precursors and predictability during failure. In: Europhysics Letters, 66 (5). pp. 715-721.

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Official URL: http://iopscience.iop.org/0295-5075/66/5/715/


We investigate the dynamics of a modi.ed Burridge-Knopo. model by introducing a dissipative term to mimic the bursts of acoustic emission (AE) from rock samples. The model explains many features of the statistics of AE signals observed in experiments such as the crossover in the exponent value from relatively small-amplitude AE signals to a larger regime, and their dependence on the pulling speed. Signi.cantly, we .nd that the cumulative energy dissipated identi.ed with acoustic emission can be used to predict a major slip event. We also .nd a data collapse of the acoustic activity for several major slip events describable by a universal stretched exponential with corrections in terms of time to failure.

Item Type: Journal Article
Publication: Europhysics Letters
Publisher: EDP Sciences
Additional Information: Copyright of this article belongs to EDP Sciences.
Keywords: self-organized criticality;earthquake fault model;acoustic-emission
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 01 Dec 2004
Last Modified: 17 Jan 2012 06:53
URI: http://eprints.iisc.ac.in/id/eprint/2221

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