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| Titel |
TEC variations over the Mediterranean during the seismic activity period of the last quarter of 2005 in the area of Greece |
| VerfasserIn |
M. E. Contadakis, D. N. Arabelos, G. Asteriadis, S. D. Spatalas, C. Pikridas |
| 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. 6 ; Nr. 8, no. 6 (2008-11-25), S.1267-1276 |
| Datensatznummer |
250005898
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| Publikation (Nr.) |
 copernicus.org/nhess-8-1267-2008.pdf |
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| Zusammenfassung |
| In this paper the Total Electron Content (TEC) data of eight Global
Positioning System (GPS) stations of the EUREF network (AUT1, Thessaloniki,
TUC2, Crete in Greece, MATE, Matera, LAMP, Lampedusa in Italy, GAIA, in
Portugal, RABT, Rabat, EVPA, Evpatoria in Ukrain and TRAB, Trabson in
Turkey) were analysed using wavelet analysis in order to detect any
frequency dependence of the correlation between TEC over different stations.
In the same time frequency dependence of Dst (Global geomagnetic field
disturbances) and TEC variations over each GPS station are searched in order
to detect any correlation between them. The main conclusion of this analysis
is that the components of TEC variation with periods <3 h are more suitable
in searching for earthquake precursors. On the base of this conclusion the
analyzed TEC series are searched for possible precursory phenomena on the
occasion of the seismic activity of the last quarter of 2005 in the area of
Greece. An exalting (i.e. an increase in the amplitude) of
variations with periods up to the tidal ones (period of 6 h,8 h,12 h) may be
observed a month before and during the seismic activity over the stations
TUC2 and AUT1 and may be attributed to this tectonic activity. Statistical
properties of the 1.5 h component of the Total Vertical Electron Content
(TVEC) over the nearest GPS stations (TUC2 and AUT1) of the areas of the
seismic activity indicate that this component present characteristic
exalting in the time period of 15 days before the shock. |
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