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| Titel |
On spread-Es effects in the ionosphere before earthquakes |
| VerfasserIn |
V. A. Liperovsky, C.-V. Meister, E. V. Liperovskaya, N. E. Vasil'eva, O. Alimov |
| 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 ; 5, no. 1 ; Nr. 5, no. 1 (2005-01-04), S.59-62 |
| Datensatznummer |
250002191
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| Publikation (Nr.) |
 copernicus.org/nhess-5-59-2005.pdf |
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| Zusammenfassung |
| The spread-Es phenomenon which appears as diffusivity of the
traces of sporadic E-layers on the ionogrammes of vertical sounding stations
and which reflects the turbulization of the sporadic layers -Es is studied in
connection with earthquake preparation processes. Spread-Es data obtained at
night every 15 min by the midlatitudinal vertical sounding station of
the ionosphere in Dushanbe (φ=38.5° N, λ=68.8° E) are analysed.
Groups of earthquakes with different magnitudes and different distances
between the epicenter and the sounding station are considered. A statistical
analysis of the obtained results is performed. It is shown that during the
three nights before an earthquake, spread-Es phenomena are observed more
often than during the forth, fifth and sixth nights before the event. This
effect is found to depend on both the magnitude of the earthquake and the
distance between the epicenter and the sounding station. |
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