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| Titel |
Specific variations of the atmospheric electric field potential gradient as a possible precursor of Caucasus earthquakes |
| VerfasserIn |
N. Kachakhidze, M. Kachakhidze, Z. Kereselidze, G. Ramishvili |
| 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 ; 9, no. 4 ; Nr. 9, no. 4 (2009-07-22), S.1221-1226 |
| Datensatznummer |
250006885
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| Publikation (Nr.) |
 copernicus.org/nhess-9-1221-2009.pdf |
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| Zusammenfassung |
The subject of the research is the study of anomalous
disturbances of the gradient of electric field potential of the atmosphere
as possible precursors of earthquakes.
In order to reveal such precursor Dusheti observatory (φ=42.05;
λ=44.42) records of electric field potential's gradient (EFPG) of
the atmosphere are considered for 41 earthquakes (M≥5.0) occurrence
moments in the Caucasus region.
Seasonal variations of atmospheric electric field potential gradient and
inter overlapping influence of meteorological parameters upon this parameter
are studied. Original method of "filtration" is devised and used in order
to identify the effect of EFPG "clear" anomalies.
The so-called "clear" anomalies are revealed from (−148.9 V/m) to 188.5 V/m
limits and they are connected with occurrence moments of 29 earthquakes
out of 41 discussed earthquakes (about 71%). "clear" anomalies manifest
themselves in 11-day precursor window.
Duration of anomalies is from 40 to 90 min. |
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