Geomagnetic Field Disturbances in Coimbra (Portugal ) and the earthquake of February 28th in 1969
Autor(a) principal: | |
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Data de Publicação: | 2019 |
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/10174/25873 |
Resumo: | The earthquake of February 28 in 1969 occurred in the horseshoe plain located in the Atlantic Ocean to the NW of Sagres, having magnitude of 8. Surveys conducted in the days after the earthquake include descriptions of phenomena that could be associated with changes in the Earth's magnetic field. The work is based on data from the records obtained by the Magnetic Observatory of the University of Coimbra, located in Coimbra (Portugal). Published data of average values, calculated in time intervals of one hour, of the horizontal and vertical components of the field and magnetic declination are used. Data for February, March and April of 1969 are analysed, with special attention being given to the month of February, before and after the earthquake occurrence and March. The measured values are compared with the values provided with the model IGRF12 for the same region and date of occurrence. Basically major magnetic field disturbances are identified on days 3, 11 and 27 of February. The disturbances are observed in the horizontal component and in the vertical component of the magnetic field as well as in the values of the magnetic declination. |
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Geomagnetic Field Disturbances in Coimbra (Portugal ) and the earthquake of February 28th in 1969GeomagnetismMagnetic anomaliesSeismic eventsThe earthquake of February 28 in 1969 occurred in the horseshoe plain located in the Atlantic Ocean to the NW of Sagres, having magnitude of 8. Surveys conducted in the days after the earthquake include descriptions of phenomena that could be associated with changes in the Earth's magnetic field. The work is based on data from the records obtained by the Magnetic Observatory of the University of Coimbra, located in Coimbra (Portugal). Published data of average values, calculated in time intervals of one hour, of the horizontal and vertical components of the field and magnetic declination are used. Data for February, March and April of 1969 are analysed, with special attention being given to the month of February, before and after the earthquake occurrence and March. The measured values are compared with the values provided with the model IGRF12 for the same region and date of occurrence. Basically major magnetic field disturbances are identified on days 3, 11 and 27 of February. The disturbances are observed in the horizontal component and in the vertical component of the magnetic field as well as in the values of the magnetic declination.IUGG2019-09-19T14:47:56Z2019-09-192019-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/25873http://hdl.handle.net/10174/25873engDuque, M. R. (2019).Geomagnetic Field Disturbances in Coimbra (portugal ) and the earthquake of February 28th in 1969 presented in IUGG2019, 27th IUGG General Assembly, Simposium S15, p.n. S15poster 133, 8 a 18 de Julho de 2091, Montréal, Canada.naonaosimmrad@uevora.pt393Duque, Maria Rosainfo: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:RCAAP2024-01-03T19:20:04Zoai:dspace.uevora.pt:10174/25873Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:16:13.868740Repositório 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 |
Geomagnetic Field Disturbances in Coimbra (Portugal ) and the earthquake of February 28th in 1969 |
title |
Geomagnetic Field Disturbances in Coimbra (Portugal ) and the earthquake of February 28th in 1969 |
spellingShingle |
Geomagnetic Field Disturbances in Coimbra (Portugal ) and the earthquake of February 28th in 1969 Duque, Maria Rosa Geomagnetism Magnetic anomalies Seismic events |
title_short |
Geomagnetic Field Disturbances in Coimbra (Portugal ) and the earthquake of February 28th in 1969 |
title_full |
Geomagnetic Field Disturbances in Coimbra (Portugal ) and the earthquake of February 28th in 1969 |
title_fullStr |
Geomagnetic Field Disturbances in Coimbra (Portugal ) and the earthquake of February 28th in 1969 |
title_full_unstemmed |
Geomagnetic Field Disturbances in Coimbra (Portugal ) and the earthquake of February 28th in 1969 |
title_sort |
Geomagnetic Field Disturbances in Coimbra (Portugal ) and the earthquake of February 28th in 1969 |
author |
Duque, Maria Rosa |
author_facet |
Duque, Maria Rosa |
author_role |
author |
dc.contributor.author.fl_str_mv |
Duque, Maria Rosa |
dc.subject.por.fl_str_mv |
Geomagnetism Magnetic anomalies Seismic events |
topic |
Geomagnetism Magnetic anomalies Seismic events |
description |
The earthquake of February 28 in 1969 occurred in the horseshoe plain located in the Atlantic Ocean to the NW of Sagres, having magnitude of 8. Surveys conducted in the days after the earthquake include descriptions of phenomena that could be associated with changes in the Earth's magnetic field. The work is based on data from the records obtained by the Magnetic Observatory of the University of Coimbra, located in Coimbra (Portugal). Published data of average values, calculated in time intervals of one hour, of the horizontal and vertical components of the field and magnetic declination are used. Data for February, March and April of 1969 are analysed, with special attention being given to the month of February, before and after the earthquake occurrence and March. The measured values are compared with the values provided with the model IGRF12 for the same region and date of occurrence. Basically major magnetic field disturbances are identified on days 3, 11 and 27 of February. The disturbances are observed in the horizontal component and in the vertical component of the magnetic field as well as in the values of the magnetic declination. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09-19T14:47:56Z 2019-09-19 2019-07-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/25873 http://hdl.handle.net/10174/25873 |
url |
http://hdl.handle.net/10174/25873 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Duque, M. R. (2019).Geomagnetic Field Disturbances in Coimbra (portugal ) and the earthquake of February 28th in 1969 presented in IUGG2019, 27th IUGG General Assembly, Simposium S15, p.n. S15poster 133, 8 a 18 de Julho de 2091, Montréal, Canada. nao nao sim mrad@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 |
IUGG |
publisher.none.fl_str_mv |
IUGG |
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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1799136644323868672 |