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Amplitude of PcP, PcS, ScS, and ScP in deep-focus earthquakes

Ergin, Kazim (1953) Amplitude of PcP, PcS, ScS, and ScP in deep-focus earthquakes. Bulletin of the Seismological Society of America, 43 (1). pp. 63-83. ISSN 0037-1106. http://resolver.caltech.edu/CaltechAUTHORS:20140805-163354495

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Abstract

A systematic study has been made of the ratios of (displacement/period) of PcP, PcS, ScS, and ScP to that of the corresponding incident wave {e.g., (displacement/period)_PcP/(displacement/period)_P}, using intermediate and deep-focus earthquake seismograms. The results indicate that the observed ratios of the horizontal components of the waves that are reflected as P waves (i.e., PcP/P and ScP/S) and that of the vertical component of the waves that are reflected as S waves (i.e., ScS/S and PcS/P) at the mantle-core boundary are considerably larger than the theoretical ones, whereas the observed ratios of the vertical component of the first group and that of the horizontal component of the second group are in fairly good agreement with the theoretical values. Theoretical computations were based on the assumption that in the case of a longitudinal wave the vibration is in the direction of propagation and in the case of a transverse wave the vibration is perpendicular to the direction of propagation. It is further found that the behavior of the direct P and S waves is in accord with the theory, but the vibration of the ground is not in the direction of propagation for PcP and ScP and is not perpendicular to the direction of propagation for PcS and ScS.


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http://bssa.geoscienceworld.org/content/43/1/63.abstractPublisherArticle
Additional Information:Copyright © 1953, by the Seismological Society of America. Condensed from a Ph.D. dissertation at the California Institute of Technology. Manuscript received for publication July 5, 1950.
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Caltech Division of Geological Sciences549
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Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140805-163354495
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48027
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:06 Aug 2014 14:44
Last Modified:13 Feb 2019 18:02

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