Quasiperiodic events in an earthquake model

Details Quasiperiodic events in an earthquake model Quasiperiodic events in an earthquake model

2005-08-12

arxiv.org/abs/cond-mat/0508316v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, RevTex4, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.96.098501

We introduce a modification of the OFC earthquake model [Phys. Rev. Lett. 68, 1244 (1992)] in order to improve resemblance with the Burridge and Knopoff mechanical model and with possible laboratory experiments. A constant force continually drives the system, and thresholds are distributed randomly following a narrow distribution. We find quasiperiodic behavior in the avalanche time series with a period proportional to the degree of dissipation of the system. Periodicity is not as robust as criticality when the threshold force distribution widens; and foreshocks and aftershocks are connected to the observed periodicity.

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