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INSTITUTE OF TECHNOLOGY SAINT LOUIS UNIVERSITY, SAINT LOUIS, MISSOURI
Abstract
The radiation patterns of P and S waves from a spherical cavity, in an infinite elastic medium on which the stress similar to a single couple force acts, were obtained by J. G. J. Scholte and A. R. Ritsema (1962). In this paper the solution for their model is presented in the case when a step function is assumed as the time variation of the stress.
As a result, it is found that the wave form of S waves depends on
in spherical coordinates (r,
, ø). Generally speaking, the orbit of the particle motion of S waves is not linear. Also the radiation pattern of S waves is similar to that for Type II rather than for Type I force system.
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T. HIRASAWA and W. STAUDER Spectral analysis of body waves from the earthquake of February 18, 1956 Bulletin of the Seismological Society of America, December 1, 1964; 54(6A): 2017 - 2035. [Abstract] [PDF] |
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