Reanalysis of the 1761 transatlantic tsunami
Autor(a) principal: | |
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Data de Publicação: | 2019 |
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/10400.21/9946 |
Resumo: | The segment of the Africa-Eurasia plate boundary between the Gloria Fault and the Strait of Gibraltar has been the setting of significant tsunamigenic earthquakes. However, their precise location and rupture mechanism remain poorly understood. The investigation of each event contributes to a better understanding of the structure of this diffuse plate boundary and ultimately leads to a better evaluation of the seismic and tsunami hazard. The 31 March 1761 event is one of the few known transatlantic tsunamis. Macroseismic data and tsunami travel times were used in previous studies to assess its source area. However, no one discussed the geological source of this event. In this study, we present a reappraisal of tsunami data to show that the observations data set is compatible with a geological source close to Coral Patch and Ampere seamounts. We constrain the rupture mechanism with plate kinematics and the tectonic setting of the area. This study favours the hypothesis that the 1761 event occurred in the southwest of the likely location of the 1 November 1755 earthquake in a slow deforming compressive regime driven by the dextral transpressive collision between Africa and Eurasia. |
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Reanalysis of the 1761 transatlantic tsunamiReappraisal of tsunami dataGeological sourceRupture mechanismPlate kinematicsTectonic settingThe segment of the Africa-Eurasia plate boundary between the Gloria Fault and the Strait of Gibraltar has been the setting of significant tsunamigenic earthquakes. However, their precise location and rupture mechanism remain poorly understood. The investigation of each event contributes to a better understanding of the structure of this diffuse plate boundary and ultimately leads to a better evaluation of the seismic and tsunami hazard. The 31 March 1761 event is one of the few known transatlantic tsunamis. Macroseismic data and tsunami travel times were used in previous studies to assess its source area. However, no one discussed the geological source of this event. In this study, we present a reappraisal of tsunami data to show that the observations data set is compatible with a geological source close to Coral Patch and Ampere seamounts. We constrain the rupture mechanism with plate kinematics and the tectonic setting of the area. This study favours the hypothesis that the 1761 event occurred in the southwest of the likely location of the 1 November 1755 earthquake in a slow deforming compressive regime driven by the dextral transpressive collision between Africa and Eurasia.Copernicus PublicationsRCIPLWronna, MartinBaptista, Maria Ana Carvalho VianaMIRANDA, JORGE MIGUEL2019-05-07T11:14:20Z2019-02-132019-02-13T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/9946engWRONNA, Martin; BAPTISTA, Maria Ana; MIRANDA, Jorge Miguel – Reanalysis of the 1761 transatlantic tsunami. Natural Hazards and Earth System Sciences. ISSN 1561-8633. Vol. 19, N.º 2 (2019), pp. 337-3521561-863310.5194/nhess-19-337-2019metadata only accessinfo: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:RCAAP2023-08-03T09:59:18Zoai:repositorio.ipl.pt:10400.21/9946Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:18:27.681262Repositório 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 |
Reanalysis of the 1761 transatlantic tsunami |
title |
Reanalysis of the 1761 transatlantic tsunami |
spellingShingle |
Reanalysis of the 1761 transatlantic tsunami Wronna, Martin Reappraisal of tsunami data Geological source Rupture mechanism Plate kinematics Tectonic setting |
title_short |
Reanalysis of the 1761 transatlantic tsunami |
title_full |
Reanalysis of the 1761 transatlantic tsunami |
title_fullStr |
Reanalysis of the 1761 transatlantic tsunami |
title_full_unstemmed |
Reanalysis of the 1761 transatlantic tsunami |
title_sort |
Reanalysis of the 1761 transatlantic tsunami |
author |
Wronna, Martin |
author_facet |
Wronna, Martin Baptista, Maria Ana Carvalho Viana MIRANDA, JORGE MIGUEL |
author_role |
author |
author2 |
Baptista, Maria Ana Carvalho Viana MIRANDA, JORGE MIGUEL |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Wronna, Martin Baptista, Maria Ana Carvalho Viana MIRANDA, JORGE MIGUEL |
dc.subject.por.fl_str_mv |
Reappraisal of tsunami data Geological source Rupture mechanism Plate kinematics Tectonic setting |
topic |
Reappraisal of tsunami data Geological source Rupture mechanism Plate kinematics Tectonic setting |
description |
The segment of the Africa-Eurasia plate boundary between the Gloria Fault and the Strait of Gibraltar has been the setting of significant tsunamigenic earthquakes. However, their precise location and rupture mechanism remain poorly understood. The investigation of each event contributes to a better understanding of the structure of this diffuse plate boundary and ultimately leads to a better evaluation of the seismic and tsunami hazard. The 31 March 1761 event is one of the few known transatlantic tsunamis. Macroseismic data and tsunami travel times were used in previous studies to assess its source area. However, no one discussed the geological source of this event. In this study, we present a reappraisal of tsunami data to show that the observations data set is compatible with a geological source close to Coral Patch and Ampere seamounts. We constrain the rupture mechanism with plate kinematics and the tectonic setting of the area. This study favours the hypothesis that the 1761 event occurred in the southwest of the likely location of the 1 November 1755 earthquake in a slow deforming compressive regime driven by the dextral transpressive collision between Africa and Eurasia. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-05-07T11:14:20Z 2019-02-13 2019-02-13T00:00:00Z |
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/10400.21/9946 |
url |
http://hdl.handle.net/10400.21/9946 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
WRONNA, Martin; BAPTISTA, Maria Ana; MIRANDA, Jorge Miguel – Reanalysis of the 1761 transatlantic tsunami. Natural Hazards and Earth System Sciences. ISSN 1561-8633. Vol. 19, N.º 2 (2019), pp. 337-352 1561-8633 10.5194/nhess-19-337-2019 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Copernicus Publications |
publisher.none.fl_str_mv |
Copernicus Publications |
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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1799133448938455040 |