Aurora? Steve? Contrail?
Taken by Sanjana Greenhill on August 26, 2018 @ Kennecott, Alaska
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I've attached a series of images of an aurora/STEVE/contrail(?) sighting at Kennecott, Alaska. While photographing auroras I noticed an east-west arc which was moving south. The images were taken just after midnight Alaska time and approximately 17 secs apart (15 sec exposure). The images were taken while looking to the east. At first I thought it was STEVE, but it didn't behave similar to another STEVE which I photographed earlier this year... and then I thought maybe it is just a contrail. But after reviewing the images on the computer I'm wondering if this is just a strange pink aurora? I've been imaging the Aurora Borealis in Alaska since 2011 and have not seen anything like this before. Perhaps it's just a cloud (strangest cloud I've ever seen)!?!
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I would say contrail, the edges look fibrous/icey.
Posted by scotty1 2018-08-31 04:31:31
It does not appear to change structure shape even a little, but only drift. All the other auroral activity changes shape drastically between frames. Compare it to other photos of steve. Does steve usually show changes in a few seconds? Evidence may point to contrail.
Posted by dougr855 2018-08-31 13:44:59
I’m no expert but the vertical lines all along the entire length of the main line lead me to think it’s auroral and not a contrail. I vote Steve. Also looks like a mini double twin shows up in the second image only temporarily. Very cool images!
Posted by TheDude 2018-08-31 20:42:00
The lines are running the same direction as the drift. Evidence that the lines are a result of time exposure. If you compare to other time lapse/sequence images of STEVE, in all the other images there is much undulating/shifting/pulsating of the stream. Here there is virtually zero, while the other aurora in these images dances about wildly.
Posted by dougr855 2018-09-01 13:30:05
 
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