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Bulletin of the Seismological Society of America; February 1971; v. 61; no. 1; p. 27-53
© 1971 Seismological Society of America
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Methods for computing ray paths in complex geological structures

G. G. SORRELLS*, J. B. CROWLEY and K. F. VEITH

TELEDYNE GEOTECH, 3401 SHILOH ROAD, GARLAND, TEXAS 75040

Abstract

The mathematics for computing three-dimensional ray paths are developed for the case where medium consists of a series of constant-velocity layers separated by planes or spherical interfaces. These relations are used to investigate the cause of the LONGSHOT travel-time anomaly. The results of the investigation suggest that the anomaly could be caused by the presence of a thick slab of high-velocity material which dips steeply beneath the Aleutian arc and terminates at a depth of 300 km.

Footnotes

* Present address: Dallas Geophysical Laboratory, Southern Methodist University, Dallas, Texas 75222




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