TY - GEN
T1 - Simulations of global seismic wave propagation for 3-D earth model
AU - Tsuboi, Seiji
AU - Komatitsch, Dimitri
AU - Ji, Chen
AU - Tromp, Jeroen
PY - 2004
Y1 - 2004
N2 - We use a Spectral-Element Method implemented on the Earth Simulator in Japan to simulate broadband seismic waves generated by various earthquakes. The spectral-element method is based on a weak formulation of the equations of motion and has both the flexibility of a finite-element method and the accuracy of a pseudospectral method. The method has been developed on a large PC cluster and optimized on the Earth Simulator. We perform numerical simulation of seismic wave propagation for a three-dimensional Earth model, which incorporates 3D variations in compressionsl wave velocity, shear-wave velocity and density, attenuation, anisotropy, ellipticity, topography and bathymetry, and crustal thickness. The simulations are performed on 4056 processors, which require 507 out of 640 nodes of the Earth Simulator. We use a mesh with 206 million spectral-elements, for a total of 13.8 billion global integration grid points (i.e., almost 37 billion degrees of freedom). We show examples of simulations for several large earthquakes and discuss future applications in seismological studies.
AB - We use a Spectral-Element Method implemented on the Earth Simulator in Japan to simulate broadband seismic waves generated by various earthquakes. The spectral-element method is based on a weak formulation of the equations of motion and has both the flexibility of a finite-element method and the accuracy of a pseudospectral method. The method has been developed on a large PC cluster and optimized on the Earth Simulator. We perform numerical simulation of seismic wave propagation for a three-dimensional Earth model, which incorporates 3D variations in compressionsl wave velocity, shear-wave velocity and density, attenuation, anisotropy, ellipticity, topography and bathymetry, and crustal thickness. The simulations are performed on 4056 processors, which require 507 out of 640 nodes of the Earth Simulator. We use a mesh with 206 million spectral-elements, for a total of 13.8 billion global integration grid points (i.e., almost 37 billion degrees of freedom). We show examples of simulations for several large earthquakes and discuss future applications in seismological studies.
KW - 3-D Earth models
KW - Seismic wave propagation
KW - Spectral-element method
UR - http://www.scopus.com/inward/record.url?scp=11244256566&partnerID=8YFLogxK
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U2 - 10.1109/HPCASIA.2004.1324082
DO - 10.1109/HPCASIA.2004.1324082
M3 - Conference contribution
AN - SCOPUS:11244256566
SN - 076952138X
SN - 9780769521381
T3 - Proceedings - Seventh International Conference on High Performance Computing and Grid in Asia Pacific Region, HPCAsia 2004
SP - 496
EP - 501
BT - Proceedings - Seventh International Conference on High Performance Computing and Grid in Asia Pacific Region, HPCAsia 2004
T2 - Proceedings - Seventh International Conference on High Performance Computing and Grid in Asia Pacific Region, HPCAsia 2004
Y2 - 20 July 2004 through 22 July 2004
ER -