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Near-field waveforms from an arbitrarily expanding, transparent spherical cavity in a prestressed medium

Minster, J. B. (1979) Near-field waveforms from an arbitrarily expanding, transparent spherical cavity in a prestressed medium. Geophysical Journal of the Royal Astronomical Society, 56 (1). pp. 81-96. ISSN 0016-8009. http://resolver.caltech.edu/CaltechAUTHORS:20141111-152853495

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Abstract

A simple, approximate (‘transparent’) solution is derived for the near-field radiation emitted by a spherical cavity expanding in an initial pure shear prestress field. Near-field terms, their propagation and decay are discussed for a variety of growth histories, and are shown to be rather insensitive to the detailed variations of rupture velocity. The transparency approximation is shown to be adequate in the near field as well as in the far field; the main effect is a slight narrowing of far-field pulses. Time domain moment estimators at close range are more reliable for the S wave than for the P wave since transverse pulses are not as strongly contaminated by near-field effects.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1111/j.1365-246X.1979.tb04769.xDOIArticle
http://gji.oxfordjournals.org/content/56/1/81.abstractPublisherArticle
Additional Information:Copyright © 1979 The Royal Astronomical Society. Received 1978 June 28; in original form 1978 January 1. This research was supported by the Advanced Research Projects Agency of the Department of Defense, and was monitored by the Air Force Office of Scientific Research under Contract No. F49620-77-C-0022. Contribution No. 3021, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA.
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Funding AgencyGrant Number
Advanced Research Projects Agency (ARPA)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)F49620-77-C-0022
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Caltech Division of Geological and Planetary Sciences3021
Record Number:CaltechAUTHORS:20141111-152853495
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141111-152853495
Official Citation:J. B. Minster Near-field waveforms from an arbitrarily expanding, transparent spherical cavity in a prestressed medium Geophys. J. Int. (1979) 56 (1): 81-96 doi:10.1111/j.1365-246X.1979.tb04769.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51608
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:11 Nov 2014 23:37
Last Modified:13 Feb 2019 18:06

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