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The rupture and asperity distribution of three great earthquakes from long-period diffracted P-waves

Ruff, Larry and Kanamori, Hiroo (1983) The rupture and asperity distribution of three great earthquakes from long-period diffracted P-waves. Physics of the Earth and Planetary Interiors, 31 (3). pp. 202-230. ISSN 0031-9201. https://resolver.caltech.edu/CaltechAUTHORS:20141105-090721939

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Abstract

Moment tensor source mechanisms for the largest twenty-nine shallow earthquakes from 1981 (M_s ≥ 6.5) have been determined using long-period Rayleigh-wave spectra and P-wave first-motions, recorded by the International Deployment of Accelerograms (IDA), Global Digital Seismic Network (GDSN), and World-Wide Standardised Seismic Network (WWSSN). These are compared with the centroid moment tensor mechanisms presented by Dziewonski and Woodhouse, which were obtained in a contrasting manner. In most cases, the source is well represented by a single double-couple mechanisms, with good agreement of scalar moment and orientation between the two studies. Apparent mismatches for other cases may be interpreted in terms of source complexity. We emphasise the objectivity of comparing moment tensor elements; apparent discrepancies in the moment and orientation of double-couple fault plane solutions are usually due to differences in the Mxz and Myz moment tensor elements, which are poorly constrained by long-period data.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0031-9201(83)90099-7DOIArticle
http://www.sciencedirect.com/science/article/pii/0031920183900997PublisherArticle
ORCID:
AuthorORCID
Kanamori, Hiroo0000-0001-8219-9428
Additional Information:© 1983 Published by Elsevier B. V. Received May 13, 1982; revision accepted August 25, 1982. This research was supported by the Division of Earth Sciences, National Science Foundation Grant No. 11973, the National Aeronautic and Space Administration Grant NSG-7610, and Exxon Production Research Agreement No. PR-7373. Contribution No. 3732, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125.
Funders:
Funding AgencyGrant Number
NSF11973
NASANSG-7610
Exxon Production ResearchPR-7373
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences3732
Issue or Number:3
Record Number:CaltechAUTHORS:20141105-090721939
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141105-090721939
Official Citation:Ruff, L., & Kanamori, H. (1983). The rupture process and asperity distribution of three great earthquakes from long-period diffracted P-waves. Physics of the Earth and Planetary Interiors, 31(3), 202-230. doi: http://dx.doi.org/10.1016/0031-9201(83)90099-7
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51275
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:05 Nov 2014 19:15
Last Modified:09 Mar 2020 13:18

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