Modeling 3-D wave propagation and finite slip for the 1998 Balleny Islands earthquake
We simulate surface waves in a 3-D Earth model using a spectral element method for existing kinematic source models of the M_W 8.1, 25 March 1998 Balleny Islands earthquake. The 3-D model incorporates lateral variations in the crust and mantle on the basis of models Crust2.0 and S20RTS. Our objectiv...
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American Geophysical Union
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ftcaltechauth:oai:authors.library.caltech.edu:a5p5e-10j30 2024-06-23T07:51:35+00:00 Modeling 3-D wave propagation and finite slip for the 1998 Balleny Islands earthquake Hjörleifsdόttir, V. Kanamori, Hiroo Tromp, Jeroen 2009-03-04 https://doi.org/10.1029/2008JB005975 unknown American Geophysical Union https://doi.org/10.1029/2008JB005975 oai:authors.library.caltech.edu:a5p5e-10j30 eprintid:15500 resolverid:CaltechAUTHORS:20090831-145009485 info:eu-repo/semantics/openAccess Other Journal of Geophysical Research B, 114(b3), B03301, (2009-03-04) Balleny Islands source modeling info:eu-repo/semantics/article 2009 ftcaltechauth https://doi.org/10.1029/2008JB005975 2024-06-12T03:45:52Z We simulate surface waves in a 3-D Earth model using a spectral element method for existing kinematic source models of the M_W 8.1, 25 March 1998 Balleny Islands earthquake. The 3-D model incorporates lateral variations in the crust and mantle on the basis of models Crust2.0 and S20RTS. Our objective is to investigate the fit of the observed and simulated long-period surface waves in the hope of improving on the existing source models. We modify a body wave model determined by Henry et al. (2000) to improve the fit of long-period surface waveforms. We demonstrate that adding a smooth component of slip extending over a fault that connects the two subevents determined by Henry et al. (2000), without invoking slip on multiple fault planes or on unconnected fault patches, provides reasonable fits to long-period surface waves as well as body waves. © 2009 by the American Geophysical Union. Received 31 July 2008; revised 22 November 2008; accepted 11 December 2008; published 4 March 2009. We acknowledge support by the National Science Foundation under grant EAR-0711177. This is Seismolab contribution 10013. The numerical simulations for this research were performed on Caltech's Division of Geological and Planetary Sciences Dell cluster.We thank Göran Ekström for helpful suggestions. The comments of Keiko Kuge and an anonymous reviewer improved the manuscript. Index Terms: 7215 Seismology: Earthquake source observations (1240); 7290 Seismology: Computational seismology; 7230 Seismology: Seismicity and tectonics (1207, 1217, 1240, 1242); 7255 Seismology: Surface waves and free oscillations. Published - Hjoerleifsdottir2009p61510.10292008JB005975.pdf Article in Journal/Newspaper Balleny Islands Caltech Authors (California Institute of Technology) Balleny Islands Journal of Geophysical Research: Solid Earth 114 B3 |
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Caltech Authors (California Institute of Technology) |
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topic |
Balleny Islands source modeling |
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Balleny Islands source modeling Hjörleifsdόttir, V. Kanamori, Hiroo Tromp, Jeroen Modeling 3-D wave propagation and finite slip for the 1998 Balleny Islands earthquake |
topic_facet |
Balleny Islands source modeling |
description |
We simulate surface waves in a 3-D Earth model using a spectral element method for existing kinematic source models of the M_W 8.1, 25 March 1998 Balleny Islands earthquake. The 3-D model incorporates lateral variations in the crust and mantle on the basis of models Crust2.0 and S20RTS. Our objective is to investigate the fit of the observed and simulated long-period surface waves in the hope of improving on the existing source models. We modify a body wave model determined by Henry et al. (2000) to improve the fit of long-period surface waveforms. We demonstrate that adding a smooth component of slip extending over a fault that connects the two subevents determined by Henry et al. (2000), without invoking slip on multiple fault planes or on unconnected fault patches, provides reasonable fits to long-period surface waves as well as body waves. © 2009 by the American Geophysical Union. Received 31 July 2008; revised 22 November 2008; accepted 11 December 2008; published 4 March 2009. We acknowledge support by the National Science Foundation under grant EAR-0711177. This is Seismolab contribution 10013. The numerical simulations for this research were performed on Caltech's Division of Geological and Planetary Sciences Dell cluster.We thank Göran Ekström for helpful suggestions. The comments of Keiko Kuge and an anonymous reviewer improved the manuscript. Index Terms: 7215 Seismology: Earthquake source observations (1240); 7290 Seismology: Computational seismology; 7230 Seismology: Seismicity and tectonics (1207, 1217, 1240, 1242); 7255 Seismology: Surface waves and free oscillations. Published - Hjoerleifsdottir2009p61510.10292008JB005975.pdf |
format |
Article in Journal/Newspaper |
author |
Hjörleifsdόttir, V. Kanamori, Hiroo Tromp, Jeroen |
author_facet |
Hjörleifsdόttir, V. Kanamori, Hiroo Tromp, Jeroen |
author_sort |
Hjörleifsdόttir, V. |
title |
Modeling 3-D wave propagation and finite slip for the 1998 Balleny Islands earthquake |
title_short |
Modeling 3-D wave propagation and finite slip for the 1998 Balleny Islands earthquake |
title_full |
Modeling 3-D wave propagation and finite slip for the 1998 Balleny Islands earthquake |
title_fullStr |
Modeling 3-D wave propagation and finite slip for the 1998 Balleny Islands earthquake |
title_full_unstemmed |
Modeling 3-D wave propagation and finite slip for the 1998 Balleny Islands earthquake |
title_sort |
modeling 3-d wave propagation and finite slip for the 1998 balleny islands earthquake |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
https://doi.org/10.1029/2008JB005975 |
geographic |
Balleny Islands |
geographic_facet |
Balleny Islands |
genre |
Balleny Islands |
genre_facet |
Balleny Islands |
op_source |
Journal of Geophysical Research B, 114(b3), B03301, (2009-03-04) |
op_relation |
https://doi.org/10.1029/2008JB005975 oai:authors.library.caltech.edu:a5p5e-10j30 eprintid:15500 resolverid:CaltechAUTHORS:20090831-145009485 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.1029/2008JB005975 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
114 |
container_issue |
B3 |
_version_ |
1802642710424715264 |