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Science 31 October 1997:
Vol. 278. no. 5339, pp. 834 - 838
DOI: 10.1126/science.278.5339.834
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Reports

Three-Dimensional Dynamic Simulation of the 1992 Landers Earthquake

K. B. Olsen, * R. Madariaga, R. J. Archuleta

The 1992 Landers, California, earthquake (magnitude 7.3) was modeled as the propagation of a spontaneous rupture controlled by a realistic prestress distribution with the use of a three-dimensional finite-difference method. The dynamic rupture reproduces the general slip pattern used to compute the initial stress distribution and generates near-fault ground motions at the surface similar to observations. The simulated rupture propagates on the fault along a complex path with highly variable speed and rise time, changing the magnitude and pattern of the stress significantly. The method provides the framework to estimate earthquake rupture parameters from recorded seismic and geodetic data.

K. B. Olsen and R. J. Archuleta, Institute for Crustal Studies, University of California, Santa Barbara, CA 93106-1100, USA.
R. Madariaga, Laboratoire de Géologie, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France.
*   To whom correspondence should be addressed.

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