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Wave fields from an off-center explosion in an embedded solid sphere

Zhao, Lian-She and Harkrider, David G. (1992) Wave fields from an off-center explosion in an embedded solid sphere. Bulletin of the Seismological Society of America, 82 (4). pp. 1927-1955. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140314-103525409

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Abstract

This study investigates the effects of explosions in asymmetric source regions on the excitation of seismic body waves. We give an analytic formulation for determining the wave fields from an off-center explosion in an embedded solid sphere in an elastic whole-space. As expected, this geometry generates shear as well as compressional body waves. The calculated wave fields show that the degree of shear-wave generation is determined by the asymmetry of the source region. The results are compared with the known analytic solutions of an explosion in an elastic whole-space and at the center of an elastic sphere embedded in the whole-space. The radiation patterns at different periods for different parameters of the media suggest that the asymmetry of the source region has significant effects on shorter period but has only minor effects on long periods. The long-period P-to-S wave maximum amplitude results are in agreement with that for explosions in axisymmetric cavities.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://www.bssaonline.org/content/82/4/1927.abstractPublisherArticle
Additional Information:© 1992 Seismological Society of America. Manuscript received 20 March 1991. This research was supported by the Defense Advanced Research Projects Agency (DOD), Nuclear Monitoring Research Office, and was monitored by Air Force Geophysics Laboratory under Contract F19628-89-K-0028. Contribution No. 4993, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California.
Funders:
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Air Force Geophysics LaboratoryF19628-89-K-0028
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Caltech Division of Geological and Planetary Sciences 4993
Issue or Number:4
Record Number:CaltechAUTHORS:20140314-103525409
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140314-103525409
Official Citation: Lian-She Zhao and David G. Harkrider Wave fields from an off-center explosion in an embedded solid sphere Bulletin of the Seismological Society of America August 1992 82:1927-1955
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44314
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:14 Mar 2014 21:02
Last Modified:03 Oct 2019 06:16

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