Ionospheric anomalies observed over South Korea preceding the Great Tohoku earthquake of 2011
Ionospheric anomalies observed over South Korea preceding the Great Tohoku earthquake of 2011
- Neue Suche nach: Choi, B.K.
- Neue Suche nach: Park, J.U.
- Neue Suche nach: Lee, S.J.
- Neue Suche nach: Choi, B.K.
- Neue Suche nach: Park, J.U.
- Neue Suche nach: Lee, S.J.
Abstract We investigated the ionospheric anomalies observed before the Tohoku earthquake, which occurred near the northeast coast of Honshu, Japan on 11 March, 2011. Based on data from a ground-based Global Positioning System (GPS) network on the Korean Peninsula, ionospheric anomalies were detected in the total electron content (TEC) during the daytime a few days before earthquake. Ionospheric TEC anomalies appeared on 5, 8 and 11 March. In particular, the ionospheric disturbances on 8 March evidenced a remarkable increase in TEC. The GPS TEC variation associated with the Tohoku earthquake was an increase of approximately 20 total electron content units (TECU), observed simultaneously in local and global TEC measurements. To investigate these pre-earthquake ionospheric anomalies, space weather conditions such as the solar activity index (F10.7) and geomagnetic activity indices (the Kp and Dst indices) were examined. We also created two-dimensional TEC maps to visual the spatial variations in the ionospheric anomalies preceding the earthquake.
Dokumentinformationen
Ionospheric anomalies observed over South Korea preceding the Great Tohoku earthquake of 2011
Advances in Space Research ; 50 , 3 ; 311-317
2012-04-11
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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