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Longitudinal waves through the Earth's core

Denson, M. E., Jr. (1952) Longitudinal waves through the Earth's core. Bulletin of the Seismological Society of America, 42 (2). pp. 119-134. ISSN 0037-1106.

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Amplitudes, periods, and travel times of the longitudinal P′ or PKP core waves have been investigated. Results indicate that the epicentral distance of the main focal point and the travel time of P′ phases vary with the periods of the waves. This variation would seem reasonably explained in terms of dispersion. The point of reversal in the travel-time curve of the waves through the outer core is believed to lie near 157°. Data suggest a discontinuity between 120° and 125° rather than 110°. Anomalies existing in energy, period, and travel-time relationships of the P′ phases indicate that current concepts of velocity distribution and of propagation paths within the core are in need of modification.

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Additional Information:Copyright © 1952, by the Seismological Society of America. Manuscript received for publication June 28, 1950. The author wishes to acknowledge help received from Dr. B. Gutenberg and from Dr. C. F. Richter. Many others at the Seismological Laboratory contributed toward completion of this work. Financial aid provided by the Stanolind Oil and Gas Fellowship is gratefully acknowledged.
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Stanolind Oil and Gas CompanyUNSPECIFIED
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Caltech Division of Geological Sciences551
Issue or Number:2
Record Number:CaltechAUTHORS:20140806-110302549
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48069
Deposited By: George Porter
Deposited On:06 Aug 2014 18:14
Last Modified:03 Oct 2019 06:59

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