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Surface Wave Energy from Point Sources in Plane Layered Earth Models

Harkrider, David G. and Anderson, Don L. (1966) Surface Wave Energy from Point Sources in Plane Layered Earth Models. Journal of Geophysical Research, 71 (12). pp. 2967-2980. ISSN 0148-0227. http://resolver.caltech.edu/CaltechAUTHORS:20140507-144951811

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Abstract

The total energy contained in a surface wave can be computed from its propagation-corrected spectrum by integrating over the surface of the earth and over the depth of the wave guide. The former requires knowledge of the radiation pattern of the source. The latter requires only a knowledge of the variation of physical properties with depth. In this paper the depth integration is performed for a continental and an oceanic earth model for three Rayleigh modes and four Love modes. The results are presented in tables and graphs in such a way that it is convenient to convert an observed surface wave displacement or displacement spectrum to total energy density. If the surface radiation pattern is known, the surface integration then yields the total energy in the observed spectrum. The partioning of energy between surface wave modes is computed for several simple sources at the surface and at depth, making it possible to estimate the energy contained in frequency bands or modes which are inaccessible for direct analysis. The increasing importance of the higher modes in the total energy budget at short periods and for channel depth sources is demonstrated. The shapes of the spectrums are diagnostic of source orientation and depth.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/JZ071i012p02967DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/JZ071i012p02967/abstractPublisherArticle
Additional Information:© 1966 American Geophysical Union. Manuscript Received: 17 JAN 1966. Contribution 1386, Division of Geological Sciences, California Institute of Technology, Pasadena. This research was supported by the Advanced Research Projects Agency and was monitored by the Air Force Office of Scientific Research under contract AF-49(638)-1337.
Funders:
Funding AgencyGrant Number
Advanced Research Projects Agency (ARPA)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)AF-49(638)-1337
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Caltech Division of Geological Sciences1386
Record Number:CaltechAUTHORS:20140507-144951811
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140507-144951811
Official Citation:Harkrider, D. G., and D. L. Anderson (1966), Surface wave energy from point sources in plane layered Earth models, J. Geophys. Res., 71(12), 2967–2980, doi:10.1029/JZ071i012p02967.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45589
Collection:CaltechAUTHORS
Deposited By: Aucoeur Ngo
Deposited On:07 May 2014 22:50
Last Modified:13 Feb 2019 18:04

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