Excitation of mantle Love waves and definition of mantle wave magnitude
A study is made of the excitation of mantle Love waves of 100 seconds period as a function of magnitude. 153 measurements of Love wave spectral density for earthquakes since 1930 ranging in magnitude from 6.0 to 8.9 are used to determine an excitation curve. The observations were first corrected to...
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Seismological Society of America
1969
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ftcaltechauth:oai:authors.library.caltech.edu:47856 2023-05-15T16:59:12+02:00 Excitation of mantle Love waves and definition of mantle wave magnitude Brune, James N. Engen, Gladys R. 1969-04 application/pdf https://authors.library.caltech.edu/47856/ https://authors.library.caltech.edu/47856/1/923.full.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140801-162416402 unknown Seismological Society of America https://authors.library.caltech.edu/47856/1/923.full.pdf Brune, James N. and Engen, Gladys R. (1969) Excitation of mantle Love waves and definition of mantle wave magnitude. Bulletin of the Seismological Society of America, 59 (2). pp. 923-933. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140801-162416402 <https://resolver.caltech.edu/CaltechAUTHORS:20140801-162416402> Article PeerReviewed 1969 ftcaltechauth 2020-04-26T16:45:15Z A study is made of the excitation of mantle Love waves of 100 seconds period as a function of magnitude. 153 measurements of Love wave spectral density for earthquakes since 1930 ranging in magnitude from 6.0 to 8.9 are used to determine an excitation curve. The observations were first corrected to a standard distance of 90°. The excitation curve supports earlier results for mantle Rayleigh waves and, for strike-slip motion, an earlier curve for seismic moment versus mantle-wave magnitude. For dip-slip motion, the moments should be multiplied by a factor of about 2 1/2. A definition of mantle wave magnitude M_M, is set up, and the largest earthquake since 1930 found on this scale is the Alaskan earthquake of March 28, 1964 where M_M = 8.9. Other comparably large earthquakes, M_M = 8.8, were the Kamchatka earthquake of November 4, 1952 and the Chilean earthquake of May 22, 1960. It is suggested that mantle-wave magnitudes be used as a diagnostic aid in estimating the Tsunami potential of earthquakes. Article in Journal/Newspaper Kamchatka Caltech Authors (California Institute of Technology) |
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Caltech Authors (California Institute of Technology) |
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A study is made of the excitation of mantle Love waves of 100 seconds period as a function of magnitude. 153 measurements of Love wave spectral density for earthquakes since 1930 ranging in magnitude from 6.0 to 8.9 are used to determine an excitation curve. The observations were first corrected to a standard distance of 90°. The excitation curve supports earlier results for mantle Rayleigh waves and, for strike-slip motion, an earlier curve for seismic moment versus mantle-wave magnitude. For dip-slip motion, the moments should be multiplied by a factor of about 2 1/2. A definition of mantle wave magnitude M_M, is set up, and the largest earthquake since 1930 found on this scale is the Alaskan earthquake of March 28, 1964 where M_M = 8.9. Other comparably large earthquakes, M_M = 8.8, were the Kamchatka earthquake of November 4, 1952 and the Chilean earthquake of May 22, 1960. It is suggested that mantle-wave magnitudes be used as a diagnostic aid in estimating the Tsunami potential of earthquakes. |
format |
Article in Journal/Newspaper |
author |
Brune, James N. Engen, Gladys R. |
spellingShingle |
Brune, James N. Engen, Gladys R. Excitation of mantle Love waves and definition of mantle wave magnitude |
author_facet |
Brune, James N. Engen, Gladys R. |
author_sort |
Brune, James N. |
title |
Excitation of mantle Love waves and definition of mantle wave magnitude |
title_short |
Excitation of mantle Love waves and definition of mantle wave magnitude |
title_full |
Excitation of mantle Love waves and definition of mantle wave magnitude |
title_fullStr |
Excitation of mantle Love waves and definition of mantle wave magnitude |
title_full_unstemmed |
Excitation of mantle Love waves and definition of mantle wave magnitude |
title_sort |
excitation of mantle love waves and definition of mantle wave magnitude |
publisher |
Seismological Society of America |
publishDate |
1969 |
url |
https://authors.library.caltech.edu/47856/ https://authors.library.caltech.edu/47856/1/923.full.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140801-162416402 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
https://authors.library.caltech.edu/47856/1/923.full.pdf Brune, James N. and Engen, Gladys R. (1969) Excitation of mantle Love waves and definition of mantle wave magnitude. Bulletin of the Seismological Society of America, 59 (2). pp. 923-933. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140801-162416402 <https://resolver.caltech.edu/CaltechAUTHORS:20140801-162416402> |
_version_ |
1766051413914288128 |