Computations of global seismic wave propagation in three dimensional earth model

Seiji Tsuboi, Dimitri Komatitsch, Chen Ji, Jeroen Tromp

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

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 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.

Original languageEnglish (US)
Title of host publicationHigh-Performance Computing - 6th International Symposium, ISHPC 2005 and First International Workshop on Advanced Low Power Systems, ALPS 2006, Revised Selected Papers
Pages434-443
Number of pages10
StatePublished - Feb 1 2008
Event6th International Symposium on High Performance Computing, ISHPC 2005 and 1st International Workshop on Advanced Low Power Systems, ALPS 2006 - Nara, Japan
Duration: Sep 7 2005Sep 9 2005

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4759 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Other

Other6th International Symposium on High Performance Computing, ISHPC 2005 and 1st International Workshop on Advanced Low Power Systems, ALPS 2006
CountryJapan
CityNara
Period9/7/059/9/05

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Computer Science(all)

Keywords

  • 3-D earth models
  • Seismic wave propagation
  • Spectral-element method

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  • Cite this

    Tsuboi, S., Komatitsch, D., Ji, C., & Tromp, J. (2008). Computations of global seismic wave propagation in three dimensional earth model. In High-Performance Computing - 6th International Symposium, ISHPC 2005 and First International Workshop on Advanced Low Power Systems, ALPS 2006, Revised Selected Papers (pp. 434-443). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 4759 LNCS).