Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/9371 |
Resumo: | On January 12th 2010 at 21:53, the Port-au-Prince – Haiti region was struck by an Mw7 earthquake, the second most deadly of the history. The last seismic significant events in the region occurred in November 1751 and June 1770 [1]. Geodetic and geological studies, previous to the 2010 earthquake [2] have warned to the potential of the destructive seismic events in that region and this event has confirmed those warnings. Some aspects of the source of this earthquake are nonconsensual. There is no agreement in the mechanism of rupture or correlation with the fault that should have it generated [3]. In order to better understand the complexity of this rupture, we combined several techniques and data of different nature. We used teleseismic body-wave and Synthetic Aperture Radar data (SAR) based on the following methodology: 1) analysis of the rupture process directivity [4] to determine the velocity and direction of rupture; 2) teleseismic body-wave inversion to obtain the spatiotemporal fault slip distribution and a detailed rupture model; 3) near field surface deformation modeling using the calculated seismic rupture model and compared with the measured deformation field using SAR data of sensor Advanced Land Observing Satellite - Phased Array L-band SAR (ALOS-PALSAR). The combined application of seismic and geodetic data reveals a complex rupture that spread during approximately 12s mainly from WNW to ESE with average velocity of 2,5km/s, on a north[U+2010]dipping fault plane. Two main asperities are obtained: the first (and largest) occurs within the first ∼ 5sec and extends for approximately 6km around the hypocenter; the second one, that happens in the remaining 6s, covers a near surface rectangular strip with about 12km long by 3km wide. The first asperity is compatible with a left lateral strike-slip motion with a small reverse component; the mechanism of second asperity is predominantly reverse. The obtained rupture process allows modeling a coseismic deformation which is in agreement with the deformation field measured by InSAR. [1] Bakun W, Flores C, Brink U, 2012 Significant Earthquakes on the Enriquillo Fault System, Hispaniola, 1500–2010: Implications for Seismic Hazard. Bul. Seis. Soc. of America, 102(1):18–30. [2] Dixon, T. et al., 1998. Relative motion between the Caribbean and North American plates and related boundary zone deformation based on a decade of GPS observations. J. Geophys. Res. 103, 15157-15182. [3] Mercier de Lépinay, B., Deschamps, A., Klingelhoefer, F., Mazabraud, Y., Delouis, B., Clouard, V., Hello Y., Crozon, J., Marcaillou, B., Graindorge, D., Vallée M., Perrot, J., Bouin, M., Saurel, J., Charvis, Philippe, C. and St-Louis, 2011. The 2010 Haiti earthquake: A complex fault pattern constrained by seismologic and tectonic observations, Geoph. Res. Let., 30, L22305 [4] Caldeira B, Bezzeghoud M, Borges JF., 2009 DIRDOP: a directivity approach to determining the seismic rupture velocity vector. J. of Seis.. 2009;14(3):565–600. |
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Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR datarupture processSAR dataHaiti Earthquaketeleseismic body-wave inversionOn January 12th 2010 at 21:53, the Port-au-Prince – Haiti region was struck by an Mw7 earthquake, the second most deadly of the history. The last seismic significant events in the region occurred in November 1751 and June 1770 [1]. Geodetic and geological studies, previous to the 2010 earthquake [2] have warned to the potential of the destructive seismic events in that region and this event has confirmed those warnings. Some aspects of the source of this earthquake are nonconsensual. There is no agreement in the mechanism of rupture or correlation with the fault that should have it generated [3]. In order to better understand the complexity of this rupture, we combined several techniques and data of different nature. We used teleseismic body-wave and Synthetic Aperture Radar data (SAR) based on the following methodology: 1) analysis of the rupture process directivity [4] to determine the velocity and direction of rupture; 2) teleseismic body-wave inversion to obtain the spatiotemporal fault slip distribution and a detailed rupture model; 3) near field surface deformation modeling using the calculated seismic rupture model and compared with the measured deformation field using SAR data of sensor Advanced Land Observing Satellite - Phased Array L-band SAR (ALOS-PALSAR). The combined application of seismic and geodetic data reveals a complex rupture that spread during approximately 12s mainly from WNW to ESE with average velocity of 2,5km/s, on a north[U+2010]dipping fault plane. Two main asperities are obtained: the first (and largest) occurs within the first ∼ 5sec and extends for approximately 6km around the hypocenter; the second one, that happens in the remaining 6s, covers a near surface rectangular strip with about 12km long by 3km wide. The first asperity is compatible with a left lateral strike-slip motion with a small reverse component; the mechanism of second asperity is predominantly reverse. The obtained rupture process allows modeling a coseismic deformation which is in agreement with the deformation field measured by InSAR. [1] Bakun W, Flores C, Brink U, 2012 Significant Earthquakes on the Enriquillo Fault System, Hispaniola, 1500–2010: Implications for Seismic Hazard. Bul. Seis. Soc. of America, 102(1):18–30. [2] Dixon, T. et al., 1998. Relative motion between the Caribbean and North American plates and related boundary zone deformation based on a decade of GPS observations. J. Geophys. Res. 103, 15157-15182. [3] Mercier de Lépinay, B., Deschamps, A., Klingelhoefer, F., Mazabraud, Y., Delouis, B., Clouard, V., Hello Y., Crozon, J., Marcaillou, B., Graindorge, D., Vallée M., Perrot, J., Bouin, M., Saurel, J., Charvis, Philippe, C. and St-Louis, 2011. The 2010 Haiti earthquake: A complex fault pattern constrained by seismologic and tectonic observations, Geoph. Res. Let., 30, L22305 [4] Caldeira B, Bezzeghoud M, Borges JF., 2009 DIRDOP: a directivity approach to determining the seismic rupture velocity vector. J. of Seis.. 2009;14(3):565–600.Copernicus2014-01-08T12:57:50Z2014-01-082013-04-07T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/9371http://hdl.handle.net/10174/9371engRúben Santos, Bento Caldeira, José Borges, and Mourad Bezzeghoud, 2013. Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data. Geophysical Research Abstracts,
Vol. 15, EGU2013-10729, 2013
, EGU General Assembly, Vienna, Austria, 7-12 April, 2013.Vienna, Austria1oralsimnaonaoDepartamento de Físicandbafcc@uevora.ptjborges@uevora.ptmourad@uevora.pt393Santos, R.Caldeira, B.Borges, J.F.Bezzeghoud, M.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:RCAAP2024-01-03T18:51:22Zoai:dspace.uevora.pt:10174/9371Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:03:29.499382Repositório 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 |
Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data |
title |
Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data |
spellingShingle |
Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data Santos, R. rupture process SAR data Haiti Earthquake teleseismic body-wave inversion |
title_short |
Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data |
title_full |
Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data |
title_fullStr |
Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data |
title_full_unstemmed |
Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data |
title_sort |
Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data |
author |
Santos, R. |
author_facet |
Santos, R. Caldeira, B. Borges, J.F. Bezzeghoud, M. |
author_role |
author |
author2 |
Caldeira, B. Borges, J.F. Bezzeghoud, M. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Santos, R. Caldeira, B. Borges, J.F. Bezzeghoud, M. |
dc.subject.por.fl_str_mv |
rupture process SAR data Haiti Earthquake teleseismic body-wave inversion |
topic |
rupture process SAR data Haiti Earthquake teleseismic body-wave inversion |
description |
On January 12th 2010 at 21:53, the Port-au-Prince – Haiti region was struck by an Mw7 earthquake, the second most deadly of the history. The last seismic significant events in the region occurred in November 1751 and June 1770 [1]. Geodetic and geological studies, previous to the 2010 earthquake [2] have warned to the potential of the destructive seismic events in that region and this event has confirmed those warnings. Some aspects of the source of this earthquake are nonconsensual. There is no agreement in the mechanism of rupture or correlation with the fault that should have it generated [3]. In order to better understand the complexity of this rupture, we combined several techniques and data of different nature. We used teleseismic body-wave and Synthetic Aperture Radar data (SAR) based on the following methodology: 1) analysis of the rupture process directivity [4] to determine the velocity and direction of rupture; 2) teleseismic body-wave inversion to obtain the spatiotemporal fault slip distribution and a detailed rupture model; 3) near field surface deformation modeling using the calculated seismic rupture model and compared with the measured deformation field using SAR data of sensor Advanced Land Observing Satellite - Phased Array L-band SAR (ALOS-PALSAR). The combined application of seismic and geodetic data reveals a complex rupture that spread during approximately 12s mainly from WNW to ESE with average velocity of 2,5km/s, on a north[U+2010]dipping fault plane. Two main asperities are obtained: the first (and largest) occurs within the first ∼ 5sec and extends for approximately 6km around the hypocenter; the second one, that happens in the remaining 6s, covers a near surface rectangular strip with about 12km long by 3km wide. The first asperity is compatible with a left lateral strike-slip motion with a small reverse component; the mechanism of second asperity is predominantly reverse. The obtained rupture process allows modeling a coseismic deformation which is in agreement with the deformation field measured by InSAR. [1] Bakun W, Flores C, Brink U, 2012 Significant Earthquakes on the Enriquillo Fault System, Hispaniola, 1500–2010: Implications for Seismic Hazard. Bul. Seis. Soc. of America, 102(1):18–30. [2] Dixon, T. et al., 1998. Relative motion between the Caribbean and North American plates and related boundary zone deformation based on a decade of GPS observations. J. Geophys. Res. 103, 15157-15182. [3] Mercier de Lépinay, B., Deschamps, A., Klingelhoefer, F., Mazabraud, Y., Delouis, B., Clouard, V., Hello Y., Crozon, J., Marcaillou, B., Graindorge, D., Vallée M., Perrot, J., Bouin, M., Saurel, J., Charvis, Philippe, C. and St-Louis, 2011. The 2010 Haiti earthquake: A complex fault pattern constrained by seismologic and tectonic observations, Geoph. Res. Let., 30, L22305 [4] Caldeira B, Bezzeghoud M, Borges JF., 2009 DIRDOP: a directivity approach to determining the seismic rupture velocity vector. J. of Seis.. 2009;14(3):565–600. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-04-07T00:00:00Z 2014-01-08T12:57:50Z 2014-01-08 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/conferenceObject |
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conferenceObject |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/9371 http://hdl.handle.net/10174/9371 |
url |
http://hdl.handle.net/10174/9371 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Rúben Santos, Bento Caldeira, José Borges, and Mourad Bezzeghoud, 2013. Seismic rupture process of the 2010 Haiti Earthquake (Mw7.0) inferred from seismic and SAR data. Geophysical Research Abstracts,
Vol. 15, EGU2013-10729, 2013
, EGU General Assembly, Vienna, Austria, 7-12 April, 2013. Vienna, Austria 1 oral sim nao nao Departamento de Física nd bafcc@uevora.pt jborges@uevora.pt mourad@uevora.pt 393 |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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Copernicus |
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Copernicus |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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