Analysis of observations backing up the existence of VLF and ionospheric TEC anomalies before the Mw6.1 earthquake in Greece, January 26, 2014

The present work integrates ground-based ionosphere measurements using very-low-frequency radio transmissions with satellite measurements of the total electron content to draw common conclusions about the possible impact that the Mw6.1 earthquake that took place in Greece on January 26, 2014, had on...

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Autores: Sánchez-Dulcet, Francisco, Rodríguez-Bouza, M., Silva, H. G., Herraiz Sarachaga, Miguel, Bezzeghoud, M., Biagi, P. F.
Tipo de documento: artigo
Estado:Versión aceptada para publicación
Data de publicação:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/121850
Acesso em linha:http://hdl.handle.net/10261/121850
Access Level:Acceso aberto
Palavra-chave:Lithosphere–atmosphere–ionosphere coupling
Earthquake precursors
Very-low-frequency radio transmissions
TEC anomaly
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spelling Analysis of observations backing up the existence of VLF and ionospheric TEC anomalies before the Mw6.1 earthquake in Greece, January 26, 2014Sánchez-Dulcet, FranciscoRodríguez-Bouza, M.Silva, H. G.Herraiz Sarachaga, MiguelBezzeghoud, M.Biagi, P. F.Lithosphere–atmosphere–ionosphere couplingEarthquake precursorsVery-low-frequency radio transmissionsTEC anomalyThe present work integrates ground-based ionosphere measurements using very-low-frequency radio transmissions with satellite measurements of the total electron content to draw common conclusions about the possible impact that the Mw6.1 earthquake that took place in Greece on January 26, 2014, had on the ionosphere. Very-low-frequency radio signals reveal the existence of an ∼4-day anomaly in the wavelet spectra of the signals received inside the earthquake preparation zone and a significant increase in the normalized variance of the signals prior to the earthquake (approximately 1 day before). Through total electron content analysis, it was possible to identify a clear anomaly from 15:00 until 20:00 UT on the day before the earthquake that appears again on the day of the earthquake between 07:00 UT and 08:00 UT. The anomalous values reach TEC∗Sigma ∼4.36 and 3.11, respectively. Their spatial and temporal distributions give grounds to assume a possible link with the earthquake preparation. The geomagnetic, solar and weather conditions during the considered period are presented and taken into account. This work is an initial and original step towards a multi-parameter approach to the problem of the possible earthquake-related effects on the ionosphere joining observations made from both ground stations and satellites. A well-founded knowledge of these phenomena is clearly necessary before dealing with their application to earthquake prediction purposes.Portuguese Science and Technology Foundation (FCT) through the project Pest/OE/CTE/UI0078/2014 and the FCT/FEDER-COMPETE project EAC (PTDC/GEO-FIQ/4178/2012) FCOMP-01-0124-FEDER-029197. The Spanish team acknowledges the support of the Spanish Ministry of Economy and Competitiveness through the project CGL2014-62113-EXP.Peer reviewedElsevierMinisterio de Economía y Competitividad (España)Fundação para a Ciência e a Tecnologia (Portugal)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201520152015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/121850reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.pce.2015.07.002Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1218502026-05-22T06:33:51Z
dc.title.none.fl_str_mv Analysis of observations backing up the existence of VLF and ionospheric TEC anomalies before the Mw6.1 earthquake in Greece, January 26, 2014
title Analysis of observations backing up the existence of VLF and ionospheric TEC anomalies before the Mw6.1 earthquake in Greece, January 26, 2014
spellingShingle Analysis of observations backing up the existence of VLF and ionospheric TEC anomalies before the Mw6.1 earthquake in Greece, January 26, 2014
Sánchez-Dulcet, Francisco
Lithosphere–atmosphere–ionosphere coupling
Earthquake precursors
Very-low-frequency radio transmissions
TEC anomaly
title_short Analysis of observations backing up the existence of VLF and ionospheric TEC anomalies before the Mw6.1 earthquake in Greece, January 26, 2014
title_full Analysis of observations backing up the existence of VLF and ionospheric TEC anomalies before the Mw6.1 earthquake in Greece, January 26, 2014
title_fullStr Analysis of observations backing up the existence of VLF and ionospheric TEC anomalies before the Mw6.1 earthquake in Greece, January 26, 2014
title_full_unstemmed Analysis of observations backing up the existence of VLF and ionospheric TEC anomalies before the Mw6.1 earthquake in Greece, January 26, 2014
title_sort Analysis of observations backing up the existence of VLF and ionospheric TEC anomalies before the Mw6.1 earthquake in Greece, January 26, 2014
dc.creator.none.fl_str_mv Sánchez-Dulcet, Francisco
Rodríguez-Bouza, M.
Silva, H. G.
Herraiz Sarachaga, Miguel
Bezzeghoud, M.
Biagi, P. F.
author Sánchez-Dulcet, Francisco
author_facet Sánchez-Dulcet, Francisco
Rodríguez-Bouza, M.
Silva, H. G.
Herraiz Sarachaga, Miguel
Bezzeghoud, M.
Biagi, P. F.
author_role author
author2 Rodríguez-Bouza, M.
Silva, H. G.
Herraiz Sarachaga, Miguel
Bezzeghoud, M.
Biagi, P. F.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Fundação para a Ciência e a Tecnologia (Portugal)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Lithosphere–atmosphere–ionosphere coupling
Earthquake precursors
Very-low-frequency radio transmissions
TEC anomaly
topic Lithosphere–atmosphere–ionosphere coupling
Earthquake precursors
Very-low-frequency radio transmissions
TEC anomaly
description The present work integrates ground-based ionosphere measurements using very-low-frequency radio transmissions with satellite measurements of the total electron content to draw common conclusions about the possible impact that the Mw6.1 earthquake that took place in Greece on January 26, 2014, had on the ionosphere. Very-low-frequency radio signals reveal the existence of an ∼4-day anomaly in the wavelet spectra of the signals received inside the earthquake preparation zone and a significant increase in the normalized variance of the signals prior to the earthquake (approximately 1 day before). Through total electron content analysis, it was possible to identify a clear anomaly from 15:00 until 20:00 UT on the day before the earthquake that appears again on the day of the earthquake between 07:00 UT and 08:00 UT. The anomalous values reach TEC∗Sigma ∼4.36 and 3.11, respectively. Their spatial and temporal distributions give grounds to assume a possible link with the earthquake preparation. The geomagnetic, solar and weather conditions during the considered period are presented and taken into account. This work is an initial and original step towards a multi-parameter approach to the problem of the possible earthquake-related effects on the ionosphere joining observations made from both ground stations and satellites. A well-founded knowledge of these phenomena is clearly necessary before dealing with their application to earthquake prediction purposes.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/121850
url http://hdl.handle.net/10261/121850
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.pce.2015.07.002
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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