NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORES
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/6339 |
Resumo: | The development of seismogenic source models is one of the first steps in seismic hazard assessment. In seismic hazard terminology, seismic source zones (SSZ) are polygons (or volumes) that delineate areas with homogeneous characteristics of seismicity. The importance of using knowledge on geology, seismicity and tectonics in the definition of source zones has been recognized for a long time [1]. However, the definition of SSZ tends to be subjective and controversial. Using SSZ based on broad geology, by spreading the seismicity clusters throughout the areal extent of a zone, provides a way to account for possible long-term non-stationary seismicity behavior [2,3]. This approach effectively increases seismicity rates in regions with no significant historical or instrumental seismicity, while decreasing seismicity rates in regions that display higher rates of seismicity. In contrast, the use of SSZ based on concentrations of seismicity or spatial smoothing results in stationary behavior [4]. In the FP7 Project SHARE (Seismic Hazard Harmonization in Europe), seismic hazard will be assessed with a logic tree approach that allows for three types of branches for seismicity models: a) smoothed seismicity, b) SSZ, c) SSZ and faults. In this context, a large-scale zonation model for use in the smoothed seismicity branch, and a new consensus SSZ model for Portugal and Azores have been developed. The new models were achieved with the participation of regional experts by combining and adapting existing models and incorporating new regional knowledge of the earthquake potential. The main criteria used for delineating the SSZ include distribution of seismicity, broad geological architecture, crustal characteristics (oceanic versus continental, tectonically active versus stable, etc.), historical catalogue completeness, and the characteristics of active or potentially-active faults. This model will be integrated into an Iberian model of SSZ to be used in the Project SHARE seismic hazard assessment. |
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NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORESSeismogenic sourceSeismic HazardSHAREFaultThe development of seismogenic source models is one of the first steps in seismic hazard assessment. In seismic hazard terminology, seismic source zones (SSZ) are polygons (or volumes) that delineate areas with homogeneous characteristics of seismicity. The importance of using knowledge on geology, seismicity and tectonics in the definition of source zones has been recognized for a long time [1]. However, the definition of SSZ tends to be subjective and controversial. Using SSZ based on broad geology, by spreading the seismicity clusters throughout the areal extent of a zone, provides a way to account for possible long-term non-stationary seismicity behavior [2,3]. This approach effectively increases seismicity rates in regions with no significant historical or instrumental seismicity, while decreasing seismicity rates in regions that display higher rates of seismicity. In contrast, the use of SSZ based on concentrations of seismicity or spatial smoothing results in stationary behavior [4]. In the FP7 Project SHARE (Seismic Hazard Harmonization in Europe), seismic hazard will be assessed with a logic tree approach that allows for three types of branches for seismicity models: a) smoothed seismicity, b) SSZ, c) SSZ and faults. In this context, a large-scale zonation model for use in the smoothed seismicity branch, and a new consensus SSZ model for Portugal and Azores have been developed. The new models were achieved with the participation of regional experts by combining and adapting existing models and incorporating new regional knowledge of the earthquake potential. The main criteria used for delineating the SSZ include distribution of seismicity, broad geological architecture, crustal characteristics (oceanic versus continental, tectonically active versus stable, etc.), historical catalogue completeness, and the characteristics of active or potentially-active faults. This model will be integrated into an Iberian model of SSZ to be used in the Project SHARE seismic hazard assessment.2012-12-04T15:10:03Z2012-12-042010-10-20T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/6339http://hdl.handle.net/10174/6339porNemser E.S., J. Cabral, P. Terrinha, S. Vilanova, G.M. Besana-Ostman, M. Bezzeghoud, J.F. Borges, A. Brum Da Silveira, J. Carvalho, R.P. Dias, P.M. Figueiredo, J.F.B.D. Fonseca, F.C. Lopes, J. Madeira, L. Matias, H. Perea, S. Silva, I.G. Wong, 2010. Compilation of active fault data in Portugal for use in seismic hazard analysis, Eds: Oliveira C.S., Costa A., Vrum H. SÍSMICA 2010 – 8o Congresso de Sismologia e Engenharia Sísmica, Aveiro, September 2010.978-989-95695-4-6Centro de Geofísica de Évora e Departamento de Física da Universidade de Évorandndndndndndndndmourad@uevora.ptjborges@uevora.ptndndndndndndndSÍSMICA 2010 – 8o Congresso de Sismologia e Engenharia Sísmica393Vilanova, S.P.Oliveira, C.S.Brum da Silveira, A.Madeira, J.Nemser, E.S.Fonseca, J.Arvidsson, R.Besana-Ostman, G.M.Bezzeghoud, M.Borges, J.F.Cabral, J.Carvalho, J.Cunha, P.P.Dias, R.P.Lopes, F.C.Perea, H.Wong, L.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:RCAAP2023-08-08T03:55:33ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORES |
title |
NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORES |
spellingShingle |
NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORES Vilanova, S.P. Seismogenic source Seismic Hazard SHARE Fault |
title_short |
NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORES |
title_full |
NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORES |
title_fullStr |
NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORES |
title_full_unstemmed |
NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORES |
title_sort |
NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORES |
author |
Vilanova, S.P. |
author_facet |
Vilanova, S.P. Oliveira, C.S. Brum da Silveira, A. Madeira, J. Nemser, E.S. Fonseca, J. Arvidsson, R. Besana-Ostman, G.M. Bezzeghoud, M. Borges, J.F. Cabral, J. Carvalho, J. Cunha, P.P. Dias, R.P. Lopes, F.C. Perea, H. Wong, L. |
author_role |
author |
author2 |
Oliveira, C.S. Brum da Silveira, A. Madeira, J. Nemser, E.S. Fonseca, J. Arvidsson, R. Besana-Ostman, G.M. Bezzeghoud, M. Borges, J.F. Cabral, J. Carvalho, J. Cunha, P.P. Dias, R.P. Lopes, F.C. Perea, H. Wong, L. |
author2_role |
author author author author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Vilanova, S.P. Oliveira, C.S. Brum da Silveira, A. Madeira, J. Nemser, E.S. Fonseca, J. Arvidsson, R. Besana-Ostman, G.M. Bezzeghoud, M. Borges, J.F. Cabral, J. Carvalho, J. Cunha, P.P. Dias, R.P. Lopes, F.C. Perea, H. Wong, L. |
dc.subject.por.fl_str_mv |
Seismogenic source Seismic Hazard SHARE Fault |
topic |
Seismogenic source Seismic Hazard SHARE Fault |
description |
The development of seismogenic source models is one of the first steps in seismic hazard assessment. In seismic hazard terminology, seismic source zones (SSZ) are polygons (or volumes) that delineate areas with homogeneous characteristics of seismicity. The importance of using knowledge on geology, seismicity and tectonics in the definition of source zones has been recognized for a long time [1]. However, the definition of SSZ tends to be subjective and controversial. Using SSZ based on broad geology, by spreading the seismicity clusters throughout the areal extent of a zone, provides a way to account for possible long-term non-stationary seismicity behavior [2,3]. This approach effectively increases seismicity rates in regions with no significant historical or instrumental seismicity, while decreasing seismicity rates in regions that display higher rates of seismicity. In contrast, the use of SSZ based on concentrations of seismicity or spatial smoothing results in stationary behavior [4]. In the FP7 Project SHARE (Seismic Hazard Harmonization in Europe), seismic hazard will be assessed with a logic tree approach that allows for three types of branches for seismicity models: a) smoothed seismicity, b) SSZ, c) SSZ and faults. In this context, a large-scale zonation model for use in the smoothed seismicity branch, and a new consensus SSZ model for Portugal and Azores have been developed. The new models were achieved with the participation of regional experts by combining and adapting existing models and incorporating new regional knowledge of the earthquake potential. The main criteria used for delineating the SSZ include distribution of seismicity, broad geological architecture, crustal characteristics (oceanic versus continental, tectonically active versus stable, etc.), historical catalogue completeness, and the characteristics of active or potentially-active faults. This model will be integrated into an Iberian model of SSZ to be used in the Project SHARE seismic hazard assessment. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-10-20T00:00:00Z 2012-12-04T15:10:03Z 2012-12-04 |
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/10174/6339 http://hdl.handle.net/10174/6339 |
url |
http://hdl.handle.net/10174/6339 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Nemser E.S., J. Cabral, P. Terrinha, S. Vilanova, G.M. Besana-Ostman, M. Bezzeghoud, J.F. Borges, A. Brum Da Silveira, J. Carvalho, R.P. Dias, P.M. Figueiredo, J.F.B.D. Fonseca, F.C. Lopes, J. Madeira, L. Matias, H. Perea, S. Silva, I.G. Wong, 2010. Compilation of active fault data in Portugal for use in seismic hazard analysis, Eds: Oliveira C.S., Costa A., Vrum H. SÍSMICA 2010 – 8o Congresso de Sismologia e Engenharia Sísmica, Aveiro, September 2010. 978-989-95695-4-6 Centro de Geofísica de Évora e Departamento de Física da Universidade de Évora nd nd nd nd nd nd nd nd mourad@uevora.pt jborges@uevora.pt nd nd nd nd nd nd nd SÍSMICA 2010 – 8o Congresso de Sismologia e Engenharia Sísmica 393 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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