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Bulletin of the Seismological Society of America; February 1974; v. 64; no. 1; p. 25-32
© 1974 Seismological Society of America
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The "shadow" from a velocity reversal

M. HRON and C. H. CHAPMAN

INSTITUTE OF EARTH AND PLANETARY PHYSICS THE UNIVERSITY OF ALBERTA, EDMONTON 7, ALBERTA

Abstract

The "shadow" from an Epstein "sech2" profile is caused by exponential decay of amplitude. The decay constant, which is independent of frequency, is identical with that obtained from the classical ray theory. The spectral amplitudes and theoretical seismograms evaluated numerically show the effect of the reversal on the acoustic wave propagation.




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R. BULAND and C. H. CHAPMAN
The computation of seismic travel times
Bulletin of the Seismological Society of America, October 1, 1983; 73(5): 1271 - 1302.
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