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Bulletin of the Seismological Society of America; April 1963; v. 53; no. 3; p. 539-548
© 1963 Seismological Society of America
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On detecting soft layers in the mantle with Rayleigh waves

D. G. HARKRIDER, A. L. HALES and F. PRESS

SEISMOLOGICAL LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA, CALIFORNIA
BERNARD PRICE INST. OF GEOPHYSICAL RESEARCH UNIVERSITY OF WITWATERSRAND, JOHANNESBURG, South Africa
DIVISION OF GEOLOGICAL SCIENCES CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA, CALIFORNIA

Abstract

The feasibility of an experiment to detect soft or molten zones in the mantle using Rayleigh wave phase velocities is examined. It is found that when the anomalous zone has large lateral extent the phase velocity curves are so affected as to make it easily detectable. A discussion of dispersion curves and displacement with depth is presented. A pseudo-flexural mode of oscillation is found to be possible for the layers above a molten zone.




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