3D parallel elastodynamic modeling of large subduction earthquakes

Authors:
Eduardo Cabrera;Mario Chavez;Raúl Madariaga;Narciso Perea;Marco Frisenda
Affiliations:
Supercomputing Dept., UNAM, Mexico DF, Mexico;Institute of Engineering, UNAM, Mexico DF, Mexico and Laboratoire de Géologie, CNRS-ENS, Paris, France;Laboratoire de Géologie, CNRS-ENS, Paris, France;Institute of Engineering, UNAM, Mexico DF, Mexico;Laboratoire de Géologie, CNRS-ENS, Paris, France
Venue:
PVM/MPI'07 Proceedings of the 14th European conference on Recent Advances in Parallel Virtual Machine and Message Passing Interface
Year:
2007

Citing 2
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Abstract

The 3D finite difference modeling of the wave propagation of M8 earthquakes in subduction zones in a realistic-size earth is very computationally intensive task. We use a parallel finite difference code that uses second order operators in time and fourth order differences in space on a staggered grid. We develop an efficient parallel program using message passing interface (MPI) and a kinematic earthquake rupture process. We achieve an efficiency of 94% with 128 (and 85% extrapolating to 1,024) processors on a dual core platform. Satisfactory results for a large subduction earthquake that occurred in Mexico in 1985 are given.