Department of Geology and Geophysics
University of Hawaii at Manoa
Honolulu, HI 96822
David SandwellScripps Institution of Oceanography
Institute of Geophysics and Planetary Physics
University of California, San Diego
La Jolla, CA 92093-0225
Long-term tectonic loading, instantaneous fault rupture, and transient postseismic rebound are key components of the earthquake cycle that expose important spatial and temporal chaaracteristics of crustal deformation. In order to better understand such behavior, we have developed semi-analytic elastic and viscoelastic (static and time-dependent) models for 3-D displacement and stress caused by a body-force dislocation. All solutions of the model are derived (and computed) in the Fourier domain to exploit the speed of the convolution theorem and thus horizontal complexity of a model fault system has no effect on the speed of the computation. A single-depth computation consisting of a horizontal grid of 2048x2048 elements, for example, requires less than 40 seconds of CPU time on a Mac G5.