DIRDOP: a directivity approach to determining the seismic rupture velocity vector
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/3693 https://doi.org/10.1007/s10950-009-9183-x |
Resumo: | Directivity effects are a characteristic of seismic source finiteness and are a consequence of the rupture spread in preferential directions. These effects are manifested through seismic spectral deviations as a function of the observation location. The directivity by Doppler effect method permits estimation of the directions and rupture velocities, beginning from the duration of common pulses, which are identified in waveforms or relative source time functions. The general model of directivity that supports the method presented here is a Doppler analysis based on a kinematic source model of rupture (Haskell, Bull Seismol Soc Am 54:1811–1841, 1964) and a structural medium with spherical symmetry. To evaluate its performance, we subjected the method to a series of tests with synthetic data obtained from ten typical seismic ruptures. The experimental conditions studied correspond with scenarios of simple and complex, unilaterally and bilaterally extended ruptures with different mechanisms and datasets with different levels of azimuthal coverage. The obtained results generally agree with the expected values. We also present four real case studies, applying the method to the following earthquakes: Arequipa, Peru (Mw = 8.4, June 23, 2001); Denali, AK, USA (Mw = 7.8; November 3, 2002); Zemmouri– Boumerdes, Algeria (Mw = 6.8, May 21, 2003); and Sumatra, Indonesia (Mw = 9.3, December 26, 2004). The results obtained from the dataset of the four earthquakes agreed, in general, with the values presented by other authors using different methods and data. |
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DIRDOP: a directivity approach to determining the seismic rupture velocity vectorDirectivityDoppler effectSeismic sourceRupture parametersseismic body waves InversionDirectivity effects are a characteristic of seismic source finiteness and are a consequence of the rupture spread in preferential directions. These effects are manifested through seismic spectral deviations as a function of the observation location. The directivity by Doppler effect method permits estimation of the directions and rupture velocities, beginning from the duration of common pulses, which are identified in waveforms or relative source time functions. The general model of directivity that supports the method presented here is a Doppler analysis based on a kinematic source model of rupture (Haskell, Bull Seismol Soc Am 54:1811–1841, 1964) and a structural medium with spherical symmetry. To evaluate its performance, we subjected the method to a series of tests with synthetic data obtained from ten typical seismic ruptures. The experimental conditions studied correspond with scenarios of simple and complex, unilaterally and bilaterally extended ruptures with different mechanisms and datasets with different levels of azimuthal coverage. The obtained results generally agree with the expected values. We also present four real case studies, applying the method to the following earthquakes: Arequipa, Peru (Mw = 8.4, June 23, 2001); Denali, AK, USA (Mw = 7.8; November 3, 2002); Zemmouri– Boumerdes, Algeria (Mw = 6.8, May 21, 2003); and Sumatra, Indonesia (Mw = 9.3, December 26, 2004). The results obtained from the dataset of the four earthquakes agreed, in general, with the values presented by other authors using different methods and data.Springer2012-01-17T15:04:01Z2012-01-172010-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/3693http://hdl.handle.net/10174/3693https://doi.org/10.1007/s10950-009-9183-xengCaldeira, Bento; Bezzeghoud, Mourad; Borges, José F.DIRDOP: a directivity approach to determining the seismic rupture velocity vector, Journal of Seismology, 14, 3, 565-600, 2009.1383-4649FISbafcc@uevora.ptmourad@uevora.ptjborges@uevora.pt249Caldeira, BentoBezzeghoud, MouradBorges, José F.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:40:53Zoai:dspace.uevora.pt:10174/3693Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:59:01.642444Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
DIRDOP: a directivity approach to determining the seismic rupture velocity vector |
title |
DIRDOP: a directivity approach to determining the seismic rupture velocity vector |
spellingShingle |
DIRDOP: a directivity approach to determining the seismic rupture velocity vector Caldeira, Bento Directivity Doppler effect Seismic source Rupture parameters seismic body waves Inversion |
title_short |
DIRDOP: a directivity approach to determining the seismic rupture velocity vector |
title_full |
DIRDOP: a directivity approach to determining the seismic rupture velocity vector |
title_fullStr |
DIRDOP: a directivity approach to determining the seismic rupture velocity vector |
title_full_unstemmed |
DIRDOP: a directivity approach to determining the seismic rupture velocity vector |
title_sort |
DIRDOP: a directivity approach to determining the seismic rupture velocity vector |
author |
Caldeira, Bento |
author_facet |
Caldeira, Bento Bezzeghoud, Mourad Borges, José F. |
author_role |
author |
author2 |
Bezzeghoud, Mourad Borges, José F. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Caldeira, Bento Bezzeghoud, Mourad Borges, José F. |
dc.subject.por.fl_str_mv |
Directivity Doppler effect Seismic source Rupture parameters seismic body waves Inversion |
topic |
Directivity Doppler effect Seismic source Rupture parameters seismic body waves Inversion |
description |
Directivity effects are a characteristic of seismic source finiteness and are a consequence of the rupture spread in preferential directions. These effects are manifested through seismic spectral deviations as a function of the observation location. The directivity by Doppler effect method permits estimation of the directions and rupture velocities, beginning from the duration of common pulses, which are identified in waveforms or relative source time functions. The general model of directivity that supports the method presented here is a Doppler analysis based on a kinematic source model of rupture (Haskell, Bull Seismol Soc Am 54:1811–1841, 1964) and a structural medium with spherical symmetry. To evaluate its performance, we subjected the method to a series of tests with synthetic data obtained from ten typical seismic ruptures. The experimental conditions studied correspond with scenarios of simple and complex, unilaterally and bilaterally extended ruptures with different mechanisms and datasets with different levels of azimuthal coverage. The obtained results generally agree with the expected values. We also present four real case studies, applying the method to the following earthquakes: Arequipa, Peru (Mw = 8.4, June 23, 2001); Denali, AK, USA (Mw = 7.8; November 3, 2002); Zemmouri– Boumerdes, Algeria (Mw = 6.8, May 21, 2003); and Sumatra, Indonesia (Mw = 9.3, December 26, 2004). The results obtained from the dataset of the four earthquakes agreed, in general, with the values presented by other authors using different methods and data. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01-01T00:00:00Z 2012-01-17T15:04:01Z 2012-01-17 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/3693 http://hdl.handle.net/10174/3693 https://doi.org/10.1007/s10950-009-9183-x |
url |
http://hdl.handle.net/10174/3693 https://doi.org/10.1007/s10950-009-9183-x |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Caldeira, Bento; Bezzeghoud, Mourad; Borges, José F.DIRDOP: a directivity approach to determining the seismic rupture velocity vector, Journal of Seismology, 14, 3, 565-600, 2009. 1383-4649 FIS bafcc@uevora.pt mourad@uevora.pt jborges@uevora.pt 249 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799136473014861824 |