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Modeling of seismic wave propagation at the scale of the Earth on a large Beowulf

Komatitsch, Dimitri and Tromp, Jeroen (2001) Modeling of seismic wave propagation at the scale of the Earth on a large Beowulf. In: SC '01 Proceedings of the 2001 ACM/IEEE conference on Supercomputing. ACM , New York, NY. ISBN 1-58113-293-X.

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We use a parallel spectral-element method to simulate the propagation of seismic waves generated by earthquakes in the entire 3-D Earth. The method is implemented using MPI on a large PC cluster (Beowulf) with 151 processors and 76 Gb of RAM. It is based upon a weak formulation of the equations of motion and combines the flexibility of a finite-element method with the accuracy of a pseudospectral method. The finite-element mesh honors all discontinuities in the Earth velocity model. To maintain a relatively constant number of grid points per seismic wavelength, the size of the elements is increased with depth in a conforming fashion, thus retaining a diagonal mass matrix. The effects of attenuation and anisotropy are incorporated. We benchmark spectral-element synthetic seismograms against a normalmode reference solution for a spherically symmetric Earth velocity model. The two methods are in excellent agreement for all waves with periods greater than 20 seconds.

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Tromp, Jeroen0000-0002-2742-8299
Additional Information:© 2001 ACM. The authors thank Luis Rivera, Philip and Rachel Abercrombie, Roland Martin, Tom Sterling, Emmanuel Chaljub, Yann Capdeville, Jan Lindheim, Ewing Lusk, Hans-Peter Bunge and Paul F. Fischer for fruitful discussions and comments. This material is based in part upon work supported by the National Science Foundation under Grant No. 0003716. This is Caltech GPS contribution No. 8823.
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Caltech Division of Geological and Planetary Sciences8823
Record Number:CaltechAUTHORS:20161117-135233066
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Official Citation:Dimitri Komatitsch and Jeroen Tromp. 2001. Modeling of seismic wave propagation at the scale of the Earth on a large Beowulf. In Proceedings of the 2001 ACM/IEEE conference on Supercomputing (SC '01). ACM, New York, NY, USA, 42-42. DOI=
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72139
Deposited By: Kristin Buxton
Deposited On:17 Nov 2016 22:26
Last Modified:11 Nov 2021 04:56

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