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GEOREF RECORD

Finite-difference calculation of traveltimes in three dimensions

John E. Vidale
Finite-difference calculation of traveltimes in three dimensions
Geophysics (May 1990) 55 (5): 521-526

Abstract

The traveltimes of first arriving seismic rays through most velocity structures can be computed rapidly on a three-dimensional numerical grid by finite-difference extrapolation. Head waves are properly treated and shadow zones are filled by the appropriate diffractions. Differences of less than 0.11 percent are found between the results of this technique and ray tracing for a complex but smooth model. This scheme has proven useful for earthquake location and shows promise as an inexpensive, well-behaved substitute for ray tracing in forward-modeling and Kirchhoff inversion applications.


ISSN: 0016-8033
EISSN: 1942-2156
Coden: GPYSA7
Serial Title: Geophysics
Serial Volume: 55
Serial Issue: 5
Title: Finite-difference calculation of traveltimes in three dimensions
Author(s): Vidale, John E.
Affiliation: Univ. Calif., C. F. Richter Seismol. Lab, Santa Cruz, CA, United States
Pages: 521-526
Published: 199005
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 18
Accession Number: 1990-031411
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. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 1990
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