Japan Geoscience Union Meeting 2014

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Poster

Symbol P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM36_28PO1] Physics and Chemistry in the Atmosphere and Ionosphere

Mon. Apr 28, 2014 6:15 PM - 7:30 PM Poster (3F)

Convener:*Otsuka Yuichi(Solar-Terrestrial Environment Laboratory, Nagoya University), Takuya Tsugawa(National Institute of Information and Communications Technology), Seiji Kawamura Seiji(National Institute of Information and Communications Technology)

6:15 PM - 7:30 PM

[PEM36-P19] Observations of seismo-traveling ionospheric disturbance during the 2011 Tohoku earthquake using HF Doppler

*Min-yang CHOU1, Ho-fang TSAI1, Jann-yenq LIU2 (1.Department of Earth Science,National Cheng-Kung University,Taiwan, 2.Institute of Space Science, National Central University, Taiwan)

Keywords:STIDs, Ionosphere, earthquake, tsunami

This paper reports seismo-traveling ionospheric disturbances (STIDs) induced by the 11 March 2011 M9.0 Tohoku-oki earthquake and following pan-Pacific tsunami by two networks of HF (high-frequency) Doppler sounding systems in Japan and Taiwan. The Hilbert-Huang Transform (HHT) is applied to analyze Doppler frequency shifts (DFSs) detecting STIDs, while the time delay, circle, ray-tracing, and beam-forming methods are used to compute the propagation of the detected STIDs. Both STIDs induced by the Rayleigh waves and tsunami of the Tohoku-oki earthquake are detected and discussed.