A portrait of the infamous STEVE arc of hot flowing gas associated with an active aurora, here showing his distinctive pink colour and the fleeting appearance of the green picket fence fingers that often show up hanging down from the main arc. On this night the green fingers lasted no more than two minutes. STEVE = Strong Thermal Emission Velocity Enhancement, and is a river of hot gas flowing east to west equatorward of the main aurora band. STEVE appeared after the main Kp5-level aurora died down in activity to the north, typical behaviour for STEVE. He was visible for only 35 to 40 minutes, again typical. .

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TOP28950909

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達志影像

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RM

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