Viscoelastic Effects in Avalanche Dynamics: A Key to Earthquake Statistics

Abstract

In many complex systems a continuous input of energy over time can be suddenly relaxed in the form of avalanches. Conventional avalanche models disregard the possibility of internal dynamical effects in the inter-avalanche periods, and thus miss basic features observed in some real systems. We address this issue by studying a model with viscoelastic relaxation, showing how coherent oscillations of the stress field can emerge spontaneously. Remarkably, these oscillations generate avalanche patterns that are similar to those observed in seismic phenomena.

arXiv comment5 pages, 4 figures, plus Supplemental Material. Published 30 April 2014

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