Hybrid modeling of <i>P-SV</i> seismic motion at inhomogeneous viscoelastic topographic structures
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- Peter Moczo
- Geophysical Institute Slovak Academy of Sciences Dúbravská cesta 842 28 Bratislava , Slovak Republic
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- Erik Bystrický
- Geophysical Institute Slovak Academy of Sciences Dúbravská cesta 842 28 Bratislava , Slovak Republic
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- Jozef Kristek
- Geophysical Institute Slovak Academy of Sciences Dúbravská cesta 842 28 Bratislava , Slovak Republic
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- José M. Carcione
- Osservatorio Geofisico Sperimentale P.O. Box 2011 34016 Trieste , Italy
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- Michel Bouchon
- Laboratoire de Geóphysique Interne et Tectonophysique Université Joseph Fourier BP53X 38041 Grenoble Cedex , France
書誌事項
- 公開日
- 1997-10-01
- DOI
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- 10.1785/bssa0870051305
- 公開者
- Seismological Society of America (SSA)
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説明
<jats:title>Abstract</jats:title> <jats:p>A new hybrid two-step method for computation of P-SV seismic motion at inhomogeneous viscoelastic topographic structure is presented. The method is based on a combination of the discrete-wavenumber (DW), finite-difference (FD), and finite-element (FE) methods. In the first step, the DW method is used to calculate the source radiation and wave propagation in the background 1D medium. In the second step, the FD-FE algorithm is used to compute the wave propagation along the topographic structure.</jats:p> <jats:p>The accuracy of the method has been separately tested for inclusion of the attenuation and for inclusion of the free-surface topography through numerical comparisons with analytical and independent numerical methods.</jats:p> <jats:p>The method is a generalization of the hybrid DW-FD method of Zahradník and Moczo (1996) for localized structures with a flat free surface.</jats:p> <jats:p>Numerical computations for a ridge, sediment valley, and the ridge neighboring the sediment valley show that a ridge can considerably influence the response of the neighboring sediment valley. This means that the neighboring topographic feature should be taken into account even when we are only interested in the valley response.</jats:p>
収録刊行物
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- Bulletin of the Seismological Society of America
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Bulletin of the Seismological Society of America 87 (5), 1305-1323, 1997-10-01
Seismological Society of America (SSA)
