Fractal evolution of MHz electromagnetic signals prior to earthquakes

dc.contributor.author	Πετράκη, Ερμιόνη	el
dc.contributor.author	Νικολόπουλος, Δημήτριος Ν.	el
dc.contributor.author	Χαλδαίος, Γιάννης	el
dc.contributor.author	Κουλουράς, Γρηγόριος Η.	el
dc.contributor.author	Νομικός, Κωνσταντίνος Δ.	el
dc.date.accessioned	2015-06-07T13:38:00Z
dc.date.issued	2015-06-07
dc.identifier.uri	http://hdl.handle.net/11400/15467
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.tandfonline.com/	en
dc.subject	electromagnetic disturbances
dc.subject	Greece
dc.subject	heterogeneous medium of the earth's crust
dc.subject	ετερογενές μέσο του φλοιού της γης
dc.subject	Ελλάδα
dc.subject	ηλεκτρομαγνητικές διαταραχές
dc.title	Fractal evolution of MHz electromagnetic signals prior to earthquakes	en
heal.type	journalArticle
heal.secondaryTitle	results collected in Greece during 2009	en
heal.classification	Technology
heal.classification	Environmental technology
heal.classification	Τεχνολογία
heal.classification	Περιβαλλοντική τεχνολογία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85133147
heal.classificationURI	http://lod.nal.usda.gov/5857
heal.classificationURI	N/A-Τεχνολογία
heal.classificationURI	N/A-Περιβαλλοντική τεχνολογία
heal.contributorName	Γιαννακόπουλος, Παναγιώτης Χ.	el
heal.contributorName	Κόττου, Σοφία Σ.	el
heal.contributorName	Stonham, John T.	en
heal.identifier.secondary	DOI:10.1080/19475705.2014.945496
heal.dateAvailable	10000-01-01
heal.language	en
heal.access	forever
heal.bibliographicCitation	PETRAKI, E., NIKOLOPOULOS, D.N., CHALDEOS, Y., KOULOURAS, G.I., NOMICOS, C.D., et al. (n.d.). Fractal evolution of MHz electromagnetic signals prior to earthquakes: results collected in Greece during 2009. Geomatics, Natural Hazards and Risk. [online]. Available from: http://www.tandfonline.com/	en
heal.abstract	This paper addressed a fractal evolution of 11 one-month lasting MHz electromagnetic disturbances, recorded in Greece prior to nine significant earthquakes of 2009. Time-space wavelet-based power spectral techniques were employed in the analysis. All investigated signals evolved naturally to epochs of fractal organization in space and time. Continuous organization was detected in seven signals. Significant number of successive (Formula presented.) power-law (Formula presented.)-values were observed lying between 1.5 and 3.0 or above. The majority of fractal segments exhibited anti-persistent (Formula presented.) or persistent (Formula presented.) behaviour. Switching between persistency and anti-persistency was also found. Locality and sensitivity were traced. Findings were considered indicative of self-organized critical states of the last stages of preparation of the investigated earthquakes. Results implied fractional Brownian modelling. Explanations were proposed in view of the asperity model. Persistent-anti-persistent MHz anomalies were due to self-organized micro-cracking of the heterogeneous medium of the earth's crust which may have led the system's evolution towards global failure. The precursory value of the signals was discussed.	en
heal.publisher	Taylor & Francis	en
heal.journalName	Geomatics, Natural Hazards and Risk	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	false