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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Detalhes bibliográficos
Autores: Sánchez Dulcet, Francisco, Rodríguez Bouza, Marta, Silva, H. G., Herraiz Sarachaga, Miguel, Bezzeghoud, M., Biagi, P. F.
Tipo de documento: artigo
Data de publicação:2015
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositório:Docta Complutense
Idioma:inglês
OAI Identifier:oai:docta.ucm.es:20.500.14352/35048
Acesso em linha:https://hdl.handle.net/20.500.14352/35048
Access Level:Acceso aberto
Palavra-chave:550.3
Lithosphere-atmosphere-ionosphere coupling
Earthquake precursors
Very-low-frequency radio transmissions
TEC anomaly
Geofísica
2507 Geofísica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/35048
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repository_id_str
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, MartaSilva, H. G.Herraiz Sarachaga, MiguelBezzeghoud, M.Biagi, P. F.550.3Lithosphere-atmosphere-ionosphere couplingEarthquake precursorsVery-low-frequency radio transmissionsTEC anomalyGeofísica2507 GeofísicaThe 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.ElsevierUniversidad Complutense de Madrid20152015-01-0120152015-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/35048reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/350482026-06-02T12:44:21Z
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
550.3
Lithosphere-atmosphere-ionosphere coupling
Earthquake precursors
Very-low-frequency radio transmissions
TEC anomaly
Geofísica
2507 Geofísica
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, Marta
Silva, H. G.
Herraiz Sarachaga, Miguel
Bezzeghoud, M.
Biagi, P. F.
author Sánchez Dulcet, Francisco
author_facet Sánchez Dulcet, Francisco
Rodríguez Bouza, Marta
Silva, H. G.
Herraiz Sarachaga, Miguel
Bezzeghoud, M.
Biagi, P. F.
author_role author
author2 Rodríguez Bouza, Marta
Silva, H. G.
Herraiz Sarachaga, Miguel
Bezzeghoud, M.
Biagi, P. F.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 550.3
Lithosphere-atmosphere-ionosphere coupling
Earthquake precursors
Very-low-frequency radio transmissions
TEC anomaly
Geofísica
2507 Geofísica
topic 550.3
Lithosphere-atmosphere-ionosphere coupling
Earthquake precursors
Very-low-frequency radio transmissions
TEC anomaly
Geofísica
2507 Geofísica
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
2015-01-01
2015
2015-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/35048
url https://hdl.handle.net/20.500.14352/35048
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869405124285169664
score 15,301603

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