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Surface-wave constraints on the August 1, 1975, Oroville earthquake

Hart, Robert S. and Butler, Rhett and Kanamori, Hiroo (1977) Surface-wave constraints on the August 1, 1975, Oroville earthquake. Bulletin of the Seismological Society of America, 67 (1). pp. 1-7. ISSN 0037-1106. http://resolver.caltech.edu/CaltechAUTHORS:20140811-165112826

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Abstract

Observations of Love and Rayleigh waves on WWSSN and Canadian Network seismograms have been used to place constraints upon the source parameters of the August 1, 1975, Oroville earthquake. The 20-sec surface-wave magnitude is 5.6. The surface-wave radiation pattern is consistent with the fault geometry determined by the body-wave study of Langston and Butler (1976). The seismic moment of this event was determined to be 1.9 × 10^(25) dyne-cm by both time-domain and long-period (T ≥ 50 sec) spectral amplitude determinations. This moment value is significantly greater than that determined by short-period studies. This difference, together with the low seismic efficiency of this earthquake, indicates that the character of the source is intrinsically different at long periods from those aspects which dominate the shorter-period spectrum.


Item Type:Article
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http://bssa.geoscienceworld.org/content/67/1/1.abstractPublisherArticle
Additional Information:Copyright © 1977, by the Seismological Society of America. Manuscript received August 19, 1976. We would like to thank all the WWSSN stations who were kind enough to send us seismograms for this event. Rhett Butler and Robert S. Hart were supported, respectively, by a Fannie and John Hertz Foundation Fellowship and a National Science Foundation Graduate Fellowship. This research was supported by NSF Contract EAR 76-14262 and by Advanced Research Projects Agency of the Department of Defense and was monitored by the Air Force Office of Scientific Research under Contract F44620-72-C-0078.
Funders:
Funding AgencyGrant Number
Fannie and John Hertz FoundationUNSPECIFIED
NSF Graduate FellowshipUNSPECIFIED
NSFEAR 76-14262
Advanced Research Projects Agency (ARPA)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)F44620-72-C-0078
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Caltech Division of Geological and Planetary Sciences2792
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Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140811-165112826
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ID Code:48361
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:12 Aug 2014 18:10
Last Modified:13 Feb 2019 18:06

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