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Regional variation of the short-period (1 to 10 second) source spectrum

Zhuo, Yuru and Kanamori, Hiroo (1987) Regional variation of the short-period (1 to 10 second) source spectrum. Bulletin of the Seismological Society of America, 77 (2). pp. 517-529. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140813-084637775

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Abstract

We determined m^b, the body-wave magnitude calculated from the maximum amplitude of short-period P waves, of 38 large earthquakes in various tectonic provinces. The data are divided into three groups: group 1 (subduction-zone thrust events); group 2 (nonsubduction-zone dip-slip and oblique-slip events); and group 3 (strike-slip events). Groups 2 and 3 include intraplate earthquakes. Comparison of m^b values for these three groups of events suggests that the source spectral amplitudes of intraplate events at a period of about 1.4 sec is 2 to 5 times larger than those of subduction-zone events with the same M_w. We also determined the source spectra of 28 large earthquakes (M_w = 6.5 to 7.7) directly from Global Digital Seismographic Network (GDSN) data, over a period range from 1 to 10 sec. At periods from 1 to 2 sec, the source spectral amplitudes of intraplate earthquakes are 2 to 4 times larger than those of subduction-zone events with the same M_w. The difference decreases as the period increases to 10 sec.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://www.bssaonline.org/content/77/2/514.abstractPublisherArticle
ORCID:
AuthorORCID
Kanamori, Hiroo0000-0001-8219-9428
Additional Information:© 1987 Seismological Society of America. Manuscript received 19 August 1986. We thank Heidi Houston, Jack Boatwright, and Dave Boore for useful comments on the manuscript. This research has been supported by the U.S. Geological Survey Grants No. 14-08-0001-Gl171 and 14- 08-0001-Gl170. Contribution No. 4359, Division of Geological and Planetary Sciences.
Funders:
Funding AgencyGrant Number
USGS14-08-0001-G1171
USGS14-08-0001-G1170
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences4359
Issue or Number:2
Record Number:CaltechAUTHORS:20140813-084637775
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140813-084637775
Official Citation:Zhuo, Y., & Kanamori, H. (1987). Regional variation of the short-period (1 to 10 second) source spectrum. Bulletin of the Seismological Society of America, 77(2), 514-529.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48479
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:13 Aug 2014 20:04
Last Modified:09 Mar 2020 13:18

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