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Response of the ionosphere to the Baltic Sea earthquake of 21 September 2004

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
GPS observations of the European permanent network were used to identify seismoionospheric precursors of Baltic Sea earthquake of 21 September 2004. It is a very rare event for this region of Europe (magnitude of about 5.0). This value is the threshold for the occurrence of seismic effects in the ionosphere. In total electron content (TEC) data over the region of the earthquake, a specific ionospheric anomaly appeared one day before the earthquake was detected. The ionospheric variability had a positive sign with an enhancement of about 4-5 TECU (1 TECU = 1016 electrons/m2) relative to the non-disturbed state of the ionosphere. The anomaly had a duration of 4-5 hours in the day time. The special size of this anomaly was about 1000 km. The characteristic parameters of the anomaly show that it can be associated with ionospheric precursors of an earthquake.
Słowa kluczowe
Czasopismo
Rocznik
Strony
90--101
Opis fizyczny
Twórcy
  • Institute of Geodesy, University of Warmia and Mazury ul. Oczapowskiego1, 10-957 Olsztyn, Poland; e-mail: kand@uwm.edu.pl, zakharenkova@newmail.ru
Bibliografia
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  • Liu, J.Y., Y.J. Chuo, S.A. Pulinets, H.F. Tsai and X.P. Zeng, 2002: "A study on the TEC perturbations prior to the Rei-Li, Chi-Chi and Chia-Yi earthquakes". In: M. Hayakawa and M. Molchanov (eds.), Seismo Electromagnetics: Lithosphere-Atmosphere-Ionosphere Coupling, Terrapub, Tokyo, 297-301.
  • Liu, J.Y., Y.J. Chuo, S.J., Shan, Y.B. Tsai, Y.I. Chen, S.A. Pulinets and S.B. Yu, 2004: "Preearthquake ionospheric anomalies registered by continuous GPS TEC measurement", Annales Geophysicae 22, 1585-1593.
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  • Pulinets, S.A., A.D. Legenka and T.I. Zelenova, 1998: "Local-time dependence of seismoionospheric variations at the F-layer maximum", Geomagn. Aeron. 38, 3, 178 (in Russian).
  • Pulinets, S.A., K.A. Boyarchuk, V.V. Hegai, V.P. Kim and A.M. Lomonosov, 2000: "Quasielectrostatic model of atmosphere-thermosphere-ionosphere coupling", Advances in Space Research 26, 8, 1209-1218.
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BSL7-0014-0035
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