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| Titel |
Daytime variations of foE connected to earthquakes |
| VerfasserIn |
E. V. Liperovskaya, V. V. Bogdanov, P.-F. Biagi, C.-V. Meister, V. A. Liperovsky |
| 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 ; 11, no. 6 ; Nr. 11, no. 6 (2011-06-28), S.1807-1812 |
| Datensatznummer |
250009498
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| Publikation (Nr.) |
 copernicus.org/nhess-11-1807-2011.pdf |
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| Zusammenfassung |
| In the present work it is shown that, in accordance with
the observations of the
vertical sounding station "Tashkent", the critical foE-frequency of
the daytime E-layer increases
about one day before winter-earthquakes with magnitudes M > 5 and depths of
the epicentre of
h < 60 km, which appeared at distances of R < 2000 km from the
station. The reliability of the result is larger than 99 %. The
phenomenon is not observed for summer-earthquakes. It seems to be
determined by the atmospheric wind system.
Further, the variations of the foE-frequency are compared with possible
simultaneous variations of the critical frequency foF2 of the F2-layer.
First results show that only very large changes of the
ionisation density in the E-layer influence the ionisation density in the
F-region. Therefore, no synchronous growth
of the foE- and foF2-frequencies 1–2 days before seismic shocks
could be observed. |
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