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Bulletin of the Seismological Society of America; June 1980; v. 70; no. 3; p. 659-670
© 1980 Seismological Society of America
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Slipping interfaces: A possible source of S radiation from explosive sources

CARLOS SALVADO* and J. BERNARD MINSTER

SEISMOLOGICAL LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA, CALIFORNIA 91125

Abstract

We consider the problem of reflection and refraction of purely compressional waves incident on an interface separating identical solid half-spaces in which the condition of continuity of shear displacement at the boundary is generalized to one that allows slippage. The problem is solved using the Cagniard-de Hoop technique. It is found that the generation of reflected P and S waves, as well as transmitted S waves, is most effective in the case of perfectly unbounded half-spaces. We discuss the implications of this model for the generation of S waves by block movement in the vicinity of an underground explosion.

Footnotes

* Present address: Sierra Geophysics, Inc., 150 N. Santa Anita Blvd., Suite 880, Arcadia, California 91006.




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