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Transmission of explosive sound through a fluid layer over an infinitely deep elastic bottom

SHELL DEVELOPMENT COMPANY EXPLORATION AND PRODUCTION RESEARCH DIVISION, HOUSTON, TEXAS

Abstract

The transmission of explosive sound through a thin fluid layer above an infinitely deep elastic bottom is described by means of an asymptotic theory. Special attention is paid to early oscillatory arrivals at large horizontal distances for the case of a high-velocity bottom, and it is found that these arrivals do not decay exponentially with horizontal distance. When the shear wave velocity in the bottom is low, the over-all response is very similar to the case of a fluid bottom, except for the Rayleigh mode, which becomes an important feature of the late signal. The response at long times may involve standing waves of finite horizontal wavelengths.

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