Parallel 3-D Simulation of Ground Motion for the 1995 Kobe Earthquake: The Component Decomposition Approach

-A new approach to parallel pseudospectral simulation of 3-D seismic wave propagation is developed based on component decomposition of the wavefield. Field quantities and equations of motion are distributed over three processors according to their relationship to the x -, y - and z -coordinates, and...

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Bibliographic Details
Published in:Pure and applied geophysics 2000-12, Vol.157 (11-12), p.2047-2062
Main Authors: Furumura, T, Koketsu, K
Format: Article
Language:English
Subjects:
Computation
Computer simulation
Decomposition
Earthquakes
Equations of motion
Geophysics
Ground motion
Grounds
Plate tectonics
Processors
Propagation
Seismic activity
Seismic phenomena
Seismic waves
Seismology
Simulation
Three dimensional
Wave propagation
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Summary:-A new approach to parallel pseudospectral simulation of 3-D seismic wave propagation is developed based on component decomposition of the wavefield. Field quantities and equations of motion are distributed over three processors according to their relationship to the x -, y - and z -coordinates, and computation is carried out concurrently on each processor with inter-processor communications. The efficiency of this approach is evaluated by a theoretical estimate and actual benchmark computations. We then conduct a 3-D simulation of strong ground motion for the 1995 Kobe (Hyogo-ken Nanbu) earthquake in order to show the feasibility of the parallel pseudospectral method. The results of the simulation demonstrate that the complex 3-D structures of the subsurface medium and source fault greatly affect the strong ground motion on the surface.
ISSN:0033-4553
1420-9136
DOI:10.1007/PL00001074