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Magnitudes of great shallow earthquakes from 1953 to 1977

Abe, Katsuyuki and Kanamori, Hiroo (1980) Magnitudes of great shallow earthquakes from 1953 to 1977. Tectonophysics, 62 (3-4). pp. 191-203. ISSN 0040-1951. https://resolver.caltech.edu/CaltechAUTHORS:20141217-082114576

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Abstract

The surface-wave magnitudes M_s are determined for 30 great shallow earthquakes that occurred during the period from 1953 to 1977. The determination is based on the amplitude and period data from all available station bulletins, and the same procedure as that employed in Gutenberg and Richter's “Seismicity of the Earth” is used. During this period, the Chilean earthquake of 1960 has the largest M_s, 8.5. The surface-wave magnitudes listed in “Earthquake Data Reports” are found to be higher than M_s on the average. By using the same method as that used by Gutenberg, the broad-band body-wave magnitudes m_B are determined for great shallow shocks for the period from 1953 to 1974. M_B is based on the amplitudes of P, PP and S waves which are measured on broadband instruments at periods of about 4–20 s. The 1-s body-wave magnitudes listed in “Bulletin of International Seismological Center” and “Earthquake Data Reports” are found to be much smaller than m_B on the average. Through the examination of Gutenberg and Richter's original worksheets, the relation between m_B and M_s is revised to m_B = 0.65 M_s + 2.5 which well satisfies the m_B and M_s data for M_s between 5.2 and 8.7.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0040-1951(80)90192-4 DOIArticle
http://www.sciencedirect.com/science/article/pii/0040195180901924PublisherArticle
ORCID:
AuthorORCID
Kanamori, Hiroo0000-0001-8219-9428
Additional Information:© 1980 Elsevier Scientific Publishing Company. Received October 1978; revised version accepted January 9, 1979. We thank Charles Richter and Markus Bath for several valuable suggestions. This research was supported by National Science Foundation Grant No. EAR77-13641. Contribution Number 3124, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125.
Funders:
Funding AgencyGrant Number
NSFEAR77-13641
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences3124
Issue or Number:3-4
Record Number:CaltechAUTHORS:20141217-082114576
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141217-082114576
Official Citation:Katsuyuki Abe, Hiroo Kanamori, Magnitudes of great shallow earthquakes from 1953 to 1977, Tectonophysics, Volume 62, Issues 3–4, 20 February 1980, Pages 191-203, ISSN 0040-1951, http://dx.doi.org/10.1016/0040-1951(80)90192-4. (http://www.sciencedirect.com/science/article/pii/0040195180901924)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52935
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:17 Dec 2014 17:04
Last Modified:09 Mar 2020 13:18

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