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.
https://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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| 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. |
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| Funders: | | Funding Agency | Grant Number |
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| Fannie and John Hertz Foundation | UNSPECIFIED | | NSF Graduate Fellowship | UNSPECIFIED | | NSF | EAR 76-14262 | | Advanced Research Projects Agency (ARPA) | UNSPECIFIED | | Air Force Office of Scientific Research (AFOSR) | F44620-72-C-0078 |
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| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
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| Caltech Division of Geological and Planetary Sciences | 2792 |
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| Issue or Number: | 1 |
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| Record Number: | CaltechAUTHORS:20140811-165112826 |
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| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140811-165112826 |
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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| ID Code: | 48361 |
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| Collection: | CaltechAUTHORS |
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| Deposited By: |
George Porter
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| Deposited On: | 12 Aug 2014 18:10 |
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| Last Modified: | 09 Mar 2020 13:18 |
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