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Caustics Produced by Waves Through the Earth's Core

Gutenberg, B. (1958) Caustics Produced by Waves Through the Earth's Core. Geophysical Journal of the Royal Astronomical Society, 1 (3). pp. 238-248. ISSN 0016-8009. doi:10.1111/j.1365-246X.1958.tb00057.x.

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Caustics produced by SKP, PKS, PKP and other phases through the Earth's core are investigated. No impulses from diffracted waves with periods of two seconds or more have been found beyond five degrees from caustics. Short waves preceding the main PKIKP-phase at distances between 125° and 140° probably have their deepest point in or near a transition zone between the liquid outer and the probably solid inner core and it is unlikely that they are related to the caustic of PKP near 145° although their travel-time curves end near this caustic. The observed range of long-period waves diffracted beyond the caustics of several phases is smaller than the maximum range calculated by Jeffreys.

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Additional Information:Copyright © 1958 The Royal Astronomical Society. (Received 1958 June 23). Contribution No. 890 from the Division of the Geological Sciences, California Institute of Technology.
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Caltech Division of Geological Sciences890
Issue or Number:3
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51859
Deposited By: George Porter
Deposited On:17 Nov 2014 22:32
Last Modified:10 Nov 2021 19:16

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