A three-dimensional semianalytic viscoelastic model for time-dependent analyses of the earthquake cycle

Citation:
Smith, B, Sandwell D.  2004.  A three-dimensional semianalytic viscoelastic model for time-dependent analyses of the earthquake cycle. Journal of Geophysical Research-Solid Earth. 109

Date Published:

Dec

Keywords:

1992 landers earthquake, 3-D analytic deformation models, california, earthquake cycle, half-space, hector-mine-earthquake, lower crust, postseismic deformation, san-andreas fault, southern, stress changes, strike-slip-fault, tensile faults, viscoelastic deformation models

Abstract:

[ 1] Exploring the earthquake cycle for large, complex tectonic boundaries that deform over thousands of years requires the development of sophisticated and efficient models. In this paper we introduce a semianalytic three-dimensional (3-D) linear viscoelastic Maxwell model that is developed in the Fourier domain to exploit the computational advantages of the convolution theorem. A new aspect of this model is an analytic solution for the surface loading of an elastic plate overlying a viscoelastic half-space. When fully implemented, the model simulates ( 1) interseismic stress accumulation on the upper locked portion of faults, ( 2) repeated earthquakes on prescribed fault segments, and ( 3) the viscoelastic response of the asthenosphere beneath the plate following episodic ruptures. We verify both the analytic solution and computer code through a variety of 2-D and 3-D tests and examples. On the basis of the methodology presented here, it is now possible to explore thousands of years of the earthquake cycle along geometrically complex 3-D fault systems.

Notes:

n/a

Website

DOI:

10.1029/2004jb003185

Scripps Publication ID:

B12401