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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: Eastward-expanding auroral surges observed in the post-midnight sector during a multiple-onset substorm

Fig. 3

Sequence of all-sky images for three eastward-expanding auroral surges observed at TRO. a The first EEAS event detected in the interval 23:59:30–00:02:50 UT. b The second event in the interval 00:14:30–00:17:50 UT. c The third event in the interval 00:31:00–00:34:20 UT. These color images were composed from the 428-, 558-, and 630-nm images taken by the all-sky Watec imagers (AWIs). Magnetic north and east correspond to the top and right, respectively

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