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Quasiperiodic events in an earthquake model

O. Ramos·E. Altshuler·K. J. Maloy
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Abstract

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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O. Ramos, E. Altshuler, K. J. Maloy. 2005-08-12. Quasiperiodic events in an earthquake model. https://doi.org/10.1103/physrevlett.96.098501

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