NDLI: Simulations of global seismic wave propagation for 3-D Earth model

Content Provider	IEEE Xplore Digital Library
Author	Tsuboi, S. Komatitsch, D. Ji, C. Tromp, J.
Copyright Year	2004
Description	Author affiliation: Inst. for Frontier Res. on Earth Evolution, JAMSTEC, Mutsu, Japan (Tsuboi, S.)
Abstract	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 compressional wave velocity, shear-wave velocity and density, attenuation, anisotropy, ellipticity, topography and bathymetry, and crystal 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.
Sponsorship	High Performance Comput. SIG Information Processing Soc. of Japan IEEE Comput. Soc. Japan Chapter
Starting Page	496
Ending Page	501
File Size	1361133
Page Count	6
File Format	PDF
ISBN	076952138X
DOI	10.1109/HPCASIA.2004.1324082
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-22
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Seismic waves Earth Earthquakes Equations Finite element methods Optimization methods Numerical simulation Attenuation Anisotropic magnetoresistance Surfaces
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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