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| Titel |
Evidence of fractional-Brownian-motion-type asperity model for earthquake generation in candidate pre-seismic electromagnetic emissions |
| VerfasserIn |
K. Eftaxias, Y. Contoyiannis, G. Balasis, K. Karamanos, J. Kopanas, G. Antonopoulos, G. Koulouras, C. Nomicos |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 8, no. 4 ; Nr. 8, no. 4 (2008-07-11), S.657-669 |
| Datensatznummer |
250005640
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| Publikation (Nr.) |
 copernicus.org/nhess-8-657-2008.pdf |
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| Zusammenfassung |
| Many aspects of earthquake generation still escape our full understanding. Observations
of electromagnetic emissions preceding significant earthquakes provide one of the few
cases of premonitory events that are possibly related to a subsequent earthquake.
Understanding the factors that control electromagnetic precursors generation seems to be
important for determining how significant earthquakes nucleate. Here we report the
results of a comprehensive study of the appearance of individual patterns in candidate
electromagnetic precursors possibly indicating the breaking of backbone of large and
strong asperities that sustain the activated fault. The search of precursory patterns is
mainly based on well documented scaling properties of fault surface topology. More
precisely, we argue that the candidate electromagnetic precursors might be originated
during the slipping of two rough and rigid fractional-Brownian-motion-type profiles one
over the other, with a roughness which is consistent with field and laboratory studies.
The results also imply that the activation of a single earthquake (fault) is a reduced
self-affine image of the whole regional seismicity and a magnified self-affine image of
the laboratory seismicity. |
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