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ABSTRACT:
Conditions under which a single oscillator model coupled with Dieterich-Ruina's rate and state dependent friction exhibits chaotic dynamics is studied. Properties of spring-block models are discussed. The parameter values of the system are explored and the corresponding numerical solutions presented. Bifurcation analysis is performed to determine the bifurcations and stability of stationary solutions and we find that the system undergoes a Hopf bifurcation to a periodic orbit. This periodic orbit then undergoes a period doubling cascade into a strange attractor, recognized as broadband noise in the power spectrum. The implications for earthquakes are discussed.

SUGGESTED CITATION:
Brittany Erickson, Bjorn Birnir, and Daniel Lavallée, "A Model for Aperiodicity in Earthquakes" (August 18, 2007). Center for Complex and Nonlinear Science. Paper Seismo1.
http://repositories.cdlib.org/cnls/Seismo1