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Fig. 11. | Earth, Planets and Space

Fig. 11.

From: Giant ionospheric disturbances observed with the SuperDARN Hokkaido HF radar and GPS network after the 2011 Tohoku earthquake

Fig. 11.

(a) Time and ground range variations of Doppler velocity on beam 4 (Fig. 10(c)) and GPS-TEC keogram along the solid line in Fig. 7, using the same format as Fig. 8(b). (b) Time variation of Doppler velocity map every 2 min. Positive and negative Doppler velocity regions are surrounded by solid and dotted rectangles, respectively. Beam 4 is marked in each figure. (c) Map of Doppler velocity during 1804–1806 JST and TEC at 1805 JST.

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