Current challenges for pre-earthquake electromagnetic emissions: shedding light from micro-scale plastic flow, granular packings, phase transitions and self-affinity notion of fracture process release_sv3jjh2khbbfxhv7rjqvgn5ff4

by K. Eftaxias, S. M. Potirakis

Published in Nonlinear Processes in Geophysics by Copernicus GmbH.

2013   Volume 20, p771-792

Abstract

<strong>Abstract.</strong> Are there credible electromagnetic (EM) potential earthquake (EQ) precursors? This a question debated in the scientific community and there may be legitimate reasons for the critical views. The negative view concerning the existence of EM potential precursors is enhanced by features that accompany their observation which are considered as paradox ones, namely, these signals: (i) are not observed at the time of EQs occurrence and during the aftershock period, (ii) are not accompanied by large precursory strain changes, (iii) are not accompanied by simultaneous geodetic or seismological precursors and (iv) their traceability is considered problematic. In this work, the detected candidate EM potential precursors are studied through a shift in thinking towards the basic science findings relative to granular packings, micron-scale plastic flow, interface depinning, fracture size effects, concepts drawn from phase transitions, self-affine notion of fracture and faulting process, universal features of fracture surfaces, recent high quality laboratory studies, theoretical models and numerical simulations. We try to contribute to the establishment of strict criteria for the definition of an emerged EM anomaly as a possibly EQ-related one, and to the explanation of potential precursory EM features which have been considered as paradoxes. A three-stage model for EQ generation by means of pre-EQ fracture-induced EM emissions is proposed. The claim that the observed EM potential precursors may permit a real-time and step-by-step monitoring of the EQ generation is tested.
In application/xml+jats format

Archived Files and Locations

application/pdf  1.8 MB
file_e6utywsmxvev5mw7wktnnrg6mu
core.ac.uk (web)
www.nonlin-processes-geophys.net (web)
nonlin-processes-geophys.net (web)
web.archive.org (webarchive)
web.archive.org (webarchive)
+ 1 more URLs
Read Archived PDF
Preserved and Accessible
Type  article-journal
Stage   published
Date   2013-10-17
Language   en ?
Container Metadata
Open Access Publication
In DOAJ
In ISSN ROAD
In Keepers Registry
ISSN-L:  1023-5809
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
Catalog Record
Revision: 75229e0b-3d52-4878-a3de-391a8ded24fa
API URL: JSON