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Reflected and minor phases in records of near-by earthquakes in southern California

Gutenberg, B. (1944) Reflected and minor phases in records of near-by earthquakes in southern California. Bulletin of the Seismological Society of America, 34 (3). pp. 137-160. ISSN 0037-1106. doi:10.1785/BSSA0340030137.

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The present paper is a direct continuation of a recent paper (Gutenberg, 1944a) in which the author has discussed travel times of the major P and S phases recorded at near-by stations for fifty southern California earthquakes. To facilitate the present investigation of phases complicated by refraction and reflection, thorough consideration was given to the partition of energy into the various reflected and refracted waves at discontinuities and to the ratio of ground displacements to the incident amplitudes at the surface of the earth (Gutenberg, 1944b). This seems desirable since the number of theoretically possible phases to be expected is very large, considering the four layers in the earth's crust; consequently, any calculated curve can be "verified" by using small impulses to be found on most seismograms. Therefore, clearly recognizable phases should be used in such investigations, and only calculated travel times for waves with amplitudes theoretically large enough to be conspicuous.

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Additional Information:Copyright © 1944 by the Seismological Society of America. Manuscript received for publication September 3, 1943.
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Balch Graduate School of the Geological Sciences360
Issue or Number:3
Record Number:CaltechAUTHORS:20140731-143502939
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47729
Deposited By: George Porter
Deposited On:31 Jul 2014 21:48
Last Modified:10 Nov 2021 17:49

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