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Seismic finite-difference modeling with spatially varying time steps

Ekkehart Tessmer
Seismic finite-difference modeling with spatially varying time steps
Geophysics (August 2000) 65 (4): 1290-1293

Abstract

Numerical seismic modeling by finite-difference methods usually works with a global time-step size. Because of stability considerations, the time-step size is determined essentially by the highest seismic velocity, i.e., the higher the highest velocity, the smaller the time step needs to be. Therefore, if large velocity contrasts exist within the numerical grid, domains of low velocity are oversampled temporally. Using different time-step sizes in different parts of the numerical grid can reduce computational costs considerably.


ISSN: 0016-8033
EISSN: 1942-2156
Coden: GPYSA7
Serial Title: Geophysics
Serial Volume: 65
Serial Issue: 4
Title: Seismic finite-difference modeling with spatially varying time steps
Author(s): Tessmer, Ekkehart
Affiliation: Universitaet Hamburg, Institut fuer Geophysik, Hamburg, Federal Republic of Germany
Pages: 1290-1293
Published: 200008
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 9
Accession Number: 2000-066326
Categories: Applied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200021
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