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Earth, Planets and Space
Fig. 8. | Earth, Planets and Space

Fig. 8.

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

Fig. 8.

(a) Time and ground range variations of echo power (with power higher than 20 dB) on beam 4. Propagation velocity of each gravity wave shown in Fig. 2(a) is again indicated. (b) Time and ground range variations of Doppler velocity on beam 4 and GPS-TEC keogram along the solid line in Fig. 7. Propagation velocity of each gravity wave shown in (a) is overlaid in the Doppler velocity plot in (b).

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