A multidisciplinary analysis for traces of the last state of earthquake generation in preseismic electromagnetic emissions

dc.contributor.author	Ποτηράκης, Στέλιος Μ.	el
dc.contributor.author	Μηναδάκης, Γιώργος	el
dc.contributor.author	Νομικός, Κωνσταντίνος Δ.	el
dc.contributor.author	Ευταξίας, Κωνσταντίνος Α.	el
dc.date.accessioned	2015-06-09T18:17:39Z
dc.date.available	2015-06-09T18:17:39Z
dc.date.issued	2015-06-09
dc.identifier.uri	http://hdl.handle.net/11400/15612
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://publications.copernicus.org/	en
dc.subject	Earthquake damage
dc.subject	electromagnetic field
dc.subject	seismicity
dc.subject	ηλεκτρομαγνητικό πεδίο
dc.subject	ζημιές από σεισμό
dc.subject	σεισμικότητα
dc.title	A multidisciplinary analysis for traces of the last state of earthquake generation in preseismic electromagnetic emissions	en
heal.type	journalArticle
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.keywordURI	http://id.loc.gov/authorities/subjects/sh2006020106
heal.identifier.secondary	DOI: 10.5194/nhess-11-2859-2011
heal.language	en
heal.access	campus
heal.publicationDate	2011
heal.bibliographicCitation	POTIRAKIS, S.M., MINADAKIS, G., NOMICOS, C.D. & EFTAXIAS, K.A. (2011). A multidisciplinary analysis for traces of the last state of earthquake generation in preseismic electromagnetic emissions. Natural Hazards and Earth System Sciences. [online] 11 (10). p. 2859-2879. Available from: http://publications.copernicus.org/[Accessed 26/10/2011]	en
heal.abstract	Many questions about earthquake (EQ) generation remain standing. Fracture induced electromagnetic (EM) fields allow real-time monitoring of damage evolution in materials during mechanical loading. An improved understanding of the EM precursors has direct implications for the study of EQ generation processes. An important challenge in this direction is to identify an observed anomaly in a recorded EM time series as a pre-seismic one and correspond this to a distinct stage of EQ generation. In previous papers (Kapiris et al., 2004; Contoyiannis et al., 2005; Papadimitriou et al., 2008), we have shown that the last kHz part of the emerged precursory EM activity is rooted in the fracture of the backbone of asperities distributed along the activated fault, sustaining the system. The crucial character of this suggestion requires further support. In this work we focus on this effort. Tools of information theory (Fisher Information) and concepts of entropy (Shannon and Tsallis entropies) are employed. The analysis indicates that the launch of the EM precursor is combined with the appearance of a significantly higher level of organization, which is an imprint of a corresponding higher level of organization of the local seismicity preceding the EQ occurrence. We argue that the temporal evolution of the detected EM precursor is in harmony with the Intermittent Criticality approach of fracture by means of energy release, correlation length, Hurst exponent and a power-law exponent obtained from frequency-size distributions of seismic/electromagnetic avalanche events. The candidate precursory EM activity is also consistent with other precursors from other disciplines. Thus, accumulated evidence, including laboratory experiments, strengthen the consideration that the emergence of the kHz EM precursor is sourced in the fracture of asperities indicating that EQ occurrence is expected.	en
heal.publisher	Copernicus Publications	en
heal.journalName	Natural Hazards and Earth System Sciences	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true