About 30 minutes after the stunning auroral display in the previous post, we were treated to the best possible encore as STEVE appeared directly overhead, accompanied by a neat row of green picket-fence auroras that was slowly marching westwards.
STEVE and green picket-fence auroras often show up during normal auroral displays, but they are produced by distinct physical processes. https://www.space.com/aurora-steve-picket-fence-phenomena-exotic-physics-earth-atmosphere