Study of directivity effect on electromagnetic emissions in the HF band as earthquake precursors

dc.contributor.author	Σταύρακας, Ηλίας	el
dc.contributor.author	Clarke, Malcolm P.	en
dc.contributor.author	Κουλουράς, Γρηγόριος Η.	el
dc.contributor.author	Σταυρακάκης, Γεώργιος Ν.	el
dc.contributor.author	Νομικός, Κωνσταντίνος Δ.	el
dc.date.accessioned	2015-06-07T09:45:34Z
dc.date.available	2015-06-07T09:45:34Z
dc.date.issued	2015-06-07
dc.identifier.uri	http://hdl.handle.net/11400/15436
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://www.elsevier.com/	en
dc.subject	Earthquake associated electromagnetic emissions
dc.subject	Earthquakes
dc.subject	HF earthquake precursors
dc.subject	Σεισμός σχετιζόμενος με ηλεκτρομαγνητικές εκπομπές
dc.subject	Σεισμοί
dc.title	Study of directivity effect on electromagnetic emissions in the HF band as earthquake precursors	en
heal.type	journalArticle
heal.secondaryTitle	preliminary results on field observations	en
heal.classification	Technology
heal.classification	Electrical engineering
heal.classification	Τεχνολογία
heal.classification	Ηλεκτρολογία Μηχανολογία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85133147
heal.classificationURI	http://zbw.eu/stw/descriptor/18426-4
heal.classificationURI	N/A-Τεχνολογία
heal.classificationURI	N/A-Ηλεκτρολογία Μηχανολογία
heal.identifier.secondary	DOI: 10.1016/j.tecto.2006.05.037
heal.language	en
heal.access	campus
heal.publicationDate	2007-02-20
heal.bibliographicCitation	STAVRAKAS, I., CLARKE, M.P., KOULOURAS, G.H., STAVRAKAKIS, G.N. & NOMICOS, C.D. (2007). Study of directivity effect on electromagnetic emissions in the HF band as earthquake precursors: preliminary results on field observations. Tectonophysics. [online] 431 (1-4). p. 263-271. Available from: http://www.elsevier.com/[Accessed 20/11/2006]	en
heal.abstract	This work focuses on the use of electromagnetic emissions (EM) in the HF band as a warning event for earthquakes. EM at HF components 41 MHz and 46 MHz were monitored and recorded from eight field stations in Greece and correlated with seismological events. Directivity effect raised since EM emissions at specific station locations were correlated to earthquake events from prescribed regions. EM recordings during 1999 were used and by visual inspection were associated to most of the earthquake events greater than 5R. Using these observations a novel algorithm based on the ratio of short term to long term signal average, together with a prediction rules set derived from 1999's EM emissions study were developed to combine results from several field stations. Performance of the system was promising, but was dependent on the geographic area of interest. Overall performance for earthquakes events of magnitude greater than 5.7 R was 75% of seismic events were correctly predicted by EM activity, while 25% were not predicted.	en
heal.publisher	Elsevier	en
heal.journalName	Tectonophysics	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true