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| Titel |
Correlation analysis technique revealing ionospheric precursors of earthquakes |
| VerfasserIn |
S. A. Pulinets, T. B. Gaivoronska, A. Leyva Contreras, L. Ciraolo |
| 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 ; 4, no. 5/6 ; Nr. 4, no. 5/6 (2004-11-15), S.697-702 |
| Datensatznummer |
250001387
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| Publikation (Nr.) |
 copernicus.org/nhess-4-697-2004.pdf |
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| Zusammenfassung |
| In this paper we focus on the variability of electron concentration in the
ionosphere measured by ground based ionosondes and GPS receivers around the
time of strong earthquakes. It has been detected and statistically proven
that several days before the seismic shock the level of this variability
increases at the station closest to the epicenter, a fact which can be
regarded as precursory phenomenon. More precisely the localness of
this specific kind of ionospheric variability is used for the correlation
analysis of data of several observation points. The similarity of
geographical location of the observation points leads to the similarity of
ionospheric variations registered at these sites during both quiet and
disturbed geomagnetic conditions, except in the case of those located at the
seismoactive zone. As a rule, the local anomalies in the F2 layer and TEC
accompanying the preparation of strong earthquakes show themselves in the
breaking of the mutual correlation of the critical frequencies foF2 or TEC
between stations situated in and outside the seismic zone. The precursory
phenomenon appears 1 to 7 days before the time of the seismic shock. |
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