Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence.
Autor(a) principal: | |
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Data de Publicação: | 2021 |
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/10174/29661 https://doi.org/Ines Hamak, Piedade Wachilala, José Borges, Nuno Dias, Inês Rio, and Mourad Bezzeghoud, 2021. Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. EGU21-8079, EGU General Assembly 2021, https://doi.org/10.5194/egusphere-egu21-8079 https://doi.org/10.5194/egusphere-egu21-8079 |
Resumo: | This work puts in light the several steps followed to obtain a 3D velocity model in Arraiolos, a region located in central Portugal. After the earthquake of January 2018 occurred, a set of stations were deployed around the main shock area and has recorded the aftershock sequence during a period of six months. The first stage of this study used a set of data recorded along the 1st month by 21 temporary seismological stations. 317 aftershocks were used to invert a 3D P and S velocity model, using LOTOS program, and showing an agglomeration of events in one local point leading to a poor resolution. Therefore, we added more stations and data to the second stage of study by integrating 437 aftershocks recorded during a period of 6 months by a set of 34 stations. The tomographic inversion of this extended aftershock sequence has shown a significant improvement of the 3D velocity model resolution and suggesting an alignment of the seismic events cluster. However, the imaged crustal volume was still too small and possessing low resolution on the edges of the area. To fix this issue, additional data and seismological stations were integrated to the study in order to increase the area of interest and cover it entirely in terms of ray density. The step which we are currently conducting concerns the location of new events followed by their integration to the tomographic study using IPMA and DOCTAR station network records. Since the later phases PmP and SmS has the potential to increase the ray coverage as similarly as the resolution of an area, we will hopefully obtain, after their integration, significant improvements in terms of accuracy and reliability of the crustal image. The main purpose of this new stage of study is to finally provide significant interpretations and figure out precisely the tectonic processes having generated the Arraiolos seismicity. Thanks are due to FCT for the financial support to the ICT project (UID/GEO/04683/2013) with the reference POCI-01- 0145-FEDER-007690, to the IDL project (UIDB/50019/2020 – IDL). |
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Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence.tomographic inversionArraiolos aftershock sequencethree-dimensional imageseismicityThis work puts in light the several steps followed to obtain a 3D velocity model in Arraiolos, a region located in central Portugal. After the earthquake of January 2018 occurred, a set of stations were deployed around the main shock area and has recorded the aftershock sequence during a period of six months. The first stage of this study used a set of data recorded along the 1st month by 21 temporary seismological stations. 317 aftershocks were used to invert a 3D P and S velocity model, using LOTOS program, and showing an agglomeration of events in one local point leading to a poor resolution. Therefore, we added more stations and data to the second stage of study by integrating 437 aftershocks recorded during a period of 6 months by a set of 34 stations. The tomographic inversion of this extended aftershock sequence has shown a significant improvement of the 3D velocity model resolution and suggesting an alignment of the seismic events cluster. However, the imaged crustal volume was still too small and possessing low resolution on the edges of the area. To fix this issue, additional data and seismological stations were integrated to the study in order to increase the area of interest and cover it entirely in terms of ray density. The step which we are currently conducting concerns the location of new events followed by their integration to the tomographic study using IPMA and DOCTAR station network records. Since the later phases PmP and SmS has the potential to increase the ray coverage as similarly as the resolution of an area, we will hopefully obtain, after their integration, significant improvements in terms of accuracy and reliability of the crustal image. The main purpose of this new stage of study is to finally provide significant interpretations and figure out precisely the tectonic processes having generated the Arraiolos seismicity. Thanks are due to FCT for the financial support to the ICT project (UID/GEO/04683/2013) with the reference POCI-01- 0145-FEDER-007690, to the IDL project (UIDB/50019/2020 – IDL).Copernicus2021-04-01T14:52:52Z2021-04-012021-03-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/29661https://doi.org/Ines Hamak, Piedade Wachilala, José Borges, Nuno Dias, Inês Rio, and Mourad Bezzeghoud, 2021. Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. EGU21-8079, EGU General Assembly 2021, https://doi.org/10.5194/egusphere-egu21-8079https://doi.org/10.5194/egusphere-egu21-8079http://hdl.handle.net/10174/29661https://doi.org/10.5194/egusphere-egu21-8079engEGU General Assembly 2021DFIShamak.ines@gmail.compiedadewachilala@gmail.comjborges@uevora.ptndndmourad@uevora.pt393Hamak, I.Wachilala, P.Borges, J. F.Dias, N. A.Rio, I.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:RCAAP2024-01-03T19:26:45Zoai:dspace.uevora.pt:10174/29661Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:19:12.193597Repositório 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 |
Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. |
title |
Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. |
spellingShingle |
Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. Hamak, I. tomographic inversion Arraiolos aftershock sequence three-dimensional image seismicity |
title_short |
Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. |
title_full |
Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. |
title_fullStr |
Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. |
title_full_unstemmed |
Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. |
title_sort |
Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. |
author |
Hamak, I. |
author_facet |
Hamak, I. Wachilala, P. Borges, J. F. Dias, N. A. Rio, I. Bezzeghoud, M. |
author_role |
author |
author2 |
Wachilala, P. Borges, J. F. Dias, N. A. Rio, I. Bezzeghoud, M. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Hamak, I. Wachilala, P. Borges, J. F. Dias, N. A. Rio, I. Bezzeghoud, M. |
dc.subject.por.fl_str_mv |
tomographic inversion Arraiolos aftershock sequence three-dimensional image seismicity |
topic |
tomographic inversion Arraiolos aftershock sequence three-dimensional image seismicity |
description |
This work puts in light the several steps followed to obtain a 3D velocity model in Arraiolos, a region located in central Portugal. After the earthquake of January 2018 occurred, a set of stations were deployed around the main shock area and has recorded the aftershock sequence during a period of six months. The first stage of this study used a set of data recorded along the 1st month by 21 temporary seismological stations. 317 aftershocks were used to invert a 3D P and S velocity model, using LOTOS program, and showing an agglomeration of events in one local point leading to a poor resolution. Therefore, we added more stations and data to the second stage of study by integrating 437 aftershocks recorded during a period of 6 months by a set of 34 stations. The tomographic inversion of this extended aftershock sequence has shown a significant improvement of the 3D velocity model resolution and suggesting an alignment of the seismic events cluster. However, the imaged crustal volume was still too small and possessing low resolution on the edges of the area. To fix this issue, additional data and seismological stations were integrated to the study in order to increase the area of interest and cover it entirely in terms of ray density. The step which we are currently conducting concerns the location of new events followed by their integration to the tomographic study using IPMA and DOCTAR station network records. Since the later phases PmP and SmS has the potential to increase the ray coverage as similarly as the resolution of an area, we will hopefully obtain, after their integration, significant improvements in terms of accuracy and reliability of the crustal image. The main purpose of this new stage of study is to finally provide significant interpretations and figure out precisely the tectonic processes having generated the Arraiolos seismicity. Thanks are due to FCT for the financial support to the ICT project (UID/GEO/04683/2013) with the reference POCI-01- 0145-FEDER-007690, to the IDL project (UIDB/50019/2020 – IDL). |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-04-01T14:52:52Z 2021-04-01 2021-03-01T00:00:00Z |
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/10174/29661 https://doi.org/Ines Hamak, Piedade Wachilala, José Borges, Nuno Dias, Inês Rio, and Mourad Bezzeghoud, 2021. Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. EGU21-8079, EGU General Assembly 2021, https://doi.org/10.5194/egusphere-egu21-8079 https://doi.org/10.5194/egusphere-egu21-8079 http://hdl.handle.net/10174/29661 https://doi.org/10.5194/egusphere-egu21-8079 |
url |
http://hdl.handle.net/10174/29661 https://doi.org/Ines Hamak, Piedade Wachilala, José Borges, Nuno Dias, Inês Rio, and Mourad Bezzeghoud, 2021. Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. EGU21-8079, EGU General Assembly 2021, https://doi.org/10.5194/egusphere-egu21-8079 https://doi.org/10.5194/egusphere-egu21-8079 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
EGU General Assembly 2021 DFIS hamak.ines@gmail.com piedadewachilala@gmail.com jborges@uevora.pt nd nd mourad@uevora.pt 393 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Copernicus |
publisher.none.fl_str_mv |
Copernicus |
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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1799136673182777344 |