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Long-period surface waves of four western United States earthquakes recorded by the Pasadena strainmeter

Doser, Diane I. and Kanamori, Hiroo (1987) Long-period surface waves of four western United States earthquakes recorded by the Pasadena strainmeter. Bulletin of the Seismological Society of America, 77 (1). pp. 236-243. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140814-081752683

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Abstract

Long-period surface waves recorded on the north-south Pasadena strainmeter are used to determine the seismic moments and fault parameters of the 19 May 1940 Imperial Valley, California, the 16 December 1954 Dixie Valley and Fairview Peak, Nevada, and the 18 August 1959 Hebgen Lake, Montana, earthquakes. Synthetic strain seismograms are matched with the observed strainmeter seismograms. Source parameters from the strainmeter modeling are more consistent with source parameters estimated from geodetic and geologic information than parameters estimated from short-period (<15 sec) body wave data. Long-period surface wave moment estimates agree well with geodetic estimates of moment, but are 1.5 to 5 times greater than moments obtained from modeling of teleseismic body waves or geologic information. The Imperial Valley earthquake is best modeled as consisting of 5 point sources along a fault 87.5 km in length with a strike, rake, and dip of 326°, 180°, and 90°. The moment for the earthquake was 4.8 × 10^(19) N-m. The synthetic seismogram that best models the Fairview Peak and Dixie Valley earthquakes assumes that the Fairview Peak earthquake was twice the size of the Dixie Valley event. Moments of 5.9 to 13 × 10^(19) and 3 to 6.5 × 10^(19) N-m are obtained for these events. A moment of 1.5 × 10^(20) N-m is obtained for the Hebgen Lake earthquake. Love waves of this earthquake are best modeled by a fault striking 102°, although surface faulting produced during the earthquake strikes 130°.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://bssa.geoscienceworld.org/content/77/1/236.abstractPublisherArticle
ORCID:
AuthorORCID
Kanamori, Hiroo0000-0001-8219-9428
Additional Information:© 1987, by the Seismological Society of America. Manuscript received 8 January 1986. This research was supported by U.S. Geological Survey Contract 14-08-0001-Gl171. D. Doser was also supported by a Caltech Bantrell postdoctoral fellowship. Contribution no. 4294, Division of Geological and Planetary Science, California Institute of Technology, Pasadena, California 91125.
Funders:
Funding AgencyGrant Number
USGS14-08-0001-G1171
Caltech Bantrell postdoctoral fellowshipUNSPECIFIED
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Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Science4294
Issue or Number:1
Record Number:CaltechAUTHORS:20140814-081752683
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140814-081752683
Official Citation:Diane I. Doser and Hiroo Kanamori Long-period surface waves of four western United States earthquakes recorded by the Pasadena strainmeter Bulletin of the Seismological Society of America, February 1987, v. 77, p. 236-243
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48539
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:14 Aug 2014 21:20
Last Modified:09 Mar 2020 13:18

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