Diagnosing Source Geometrical Complexity of Large Earthquakes
We investigated the possible frequency dependence of the moment tensor of large earthquakes by performing W phase inversions using teleseismic data and equally-spaced narrow, overlapping frequency bands. We investigated frequencies from 0.6 to 3.8 mHz. Our focus was on the variation with frequency o...
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ftcaltechauth:oai:authors.library.caltech.edu:52999 2023-05-15T17:09:57+02:00 Diagnosing Source Geometrical Complexity of Large Earthquakes Rivera, L. Kanamori, H. 2014-10 https://authors.library.caltech.edu/52999/ https://resolver.caltech.edu/CaltechAUTHORS:20141218-081401776 unknown Springer Rivera, L. and Kanamori, H. (2014) Diagnosing Source Geometrical Complexity of Large Earthquakes. Pure and Applied Geophysics, 171 (10). pp. 2819-2840. ISSN 0033-4553. doi:10.1007/s00024-013-0769-4. https://resolver.caltech.edu/CaltechAUTHORS:20141218-081401776 <https://resolver.caltech.edu/CaltechAUTHORS:20141218-081401776> Article PeerReviewed 2014 ftcaltechauth https://doi.org/10.1007/s00024-013-0769-4 2021-11-11T19:01:47Z We investigated the possible frequency dependence of the moment tensor of large earthquakes by performing W phase inversions using teleseismic data and equally-spaced narrow, overlapping frequency bands. We investigated frequencies from 0.6 to 3.8 mHz. Our focus was on the variation with frequency of the scalar moment, the amount of non-double-couple, and the focal mechanism. We applied this technique to 30 major events in the period 1994–2013 and used the results to detect source complexity. Based on the results, we classed them into three groups according to the variability of the source parameters with frequency: simple, complex and intermediate. Twelve of these events fell into the simple category: Bolivia-1994, Kuril-1994, Sanriku-1994, Antofagasta-1995, Andreanoff-1996, Peru-2001, Sumatra-2004, Sumatra-2005, Tonga-2006, Sumatra-2007, Japan-2011, and the recent Sea of Okhotsk-2013. Seven exhibited significant complexity: Balleny-1998, Sumatra-2000, Indian Ocean-2000, Macquarie Island-2004, Sichuan-2008, and Samoa-2009. The remaining 11 events showed a moderate degree of complexity. Here, we discuss the results of this study in light of independent observations of source complexity, made by various investigators. Article in Journal/Newspaper Macquarie Island Caltech Authors (California Institute of Technology) Indian Okhotsk Tonga ENVELOPE(7.990,7.990,63.065,63.065) Pure and Applied Geophysics 171 10 2819 2840 |
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Caltech Authors (California Institute of Technology) |
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We investigated the possible frequency dependence of the moment tensor of large earthquakes by performing W phase inversions using teleseismic data and equally-spaced narrow, overlapping frequency bands. We investigated frequencies from 0.6 to 3.8 mHz. Our focus was on the variation with frequency of the scalar moment, the amount of non-double-couple, and the focal mechanism. We applied this technique to 30 major events in the period 1994–2013 and used the results to detect source complexity. Based on the results, we classed them into three groups according to the variability of the source parameters with frequency: simple, complex and intermediate. Twelve of these events fell into the simple category: Bolivia-1994, Kuril-1994, Sanriku-1994, Antofagasta-1995, Andreanoff-1996, Peru-2001, Sumatra-2004, Sumatra-2005, Tonga-2006, Sumatra-2007, Japan-2011, and the recent Sea of Okhotsk-2013. Seven exhibited significant complexity: Balleny-1998, Sumatra-2000, Indian Ocean-2000, Macquarie Island-2004, Sichuan-2008, and Samoa-2009. The remaining 11 events showed a moderate degree of complexity. Here, we discuss the results of this study in light of independent observations of source complexity, made by various investigators. |
format |
Article in Journal/Newspaper |
author |
Rivera, L. Kanamori, H. |
spellingShingle |
Rivera, L. Kanamori, H. Diagnosing Source Geometrical Complexity of Large Earthquakes |
author_facet |
Rivera, L. Kanamori, H. |
author_sort |
Rivera, L. |
title |
Diagnosing Source Geometrical Complexity of Large Earthquakes |
title_short |
Diagnosing Source Geometrical Complexity of Large Earthquakes |
title_full |
Diagnosing Source Geometrical Complexity of Large Earthquakes |
title_fullStr |
Diagnosing Source Geometrical Complexity of Large Earthquakes |
title_full_unstemmed |
Diagnosing Source Geometrical Complexity of Large Earthquakes |
title_sort |
diagnosing source geometrical complexity of large earthquakes |
publisher |
Springer |
publishDate |
2014 |
url |
https://authors.library.caltech.edu/52999/ https://resolver.caltech.edu/CaltechAUTHORS:20141218-081401776 |
long_lat |
ENVELOPE(7.990,7.990,63.065,63.065) |
geographic |
Indian Okhotsk Tonga |
geographic_facet |
Indian Okhotsk Tonga |
genre |
Macquarie Island |
genre_facet |
Macquarie Island |
op_relation |
Rivera, L. and Kanamori, H. (2014) Diagnosing Source Geometrical Complexity of Large Earthquakes. Pure and Applied Geophysics, 171 (10). pp. 2819-2840. ISSN 0033-4553. doi:10.1007/s00024-013-0769-4. https://resolver.caltech.edu/CaltechAUTHORS:20141218-081401776 <https://resolver.caltech.edu/CaltechAUTHORS:20141218-081401776> |
op_doi |
https://doi.org/10.1007/s00024-013-0769-4 |
container_title |
Pure and Applied Geophysics |
container_volume |
171 |
container_issue |
10 |
container_start_page |
2819 |
op_container_end_page |
2840 |
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1766066339280060416 |