Taken by Oliver Wright on October 26, 2017 @ Abisko, Sweden
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  Camera Used: Canon Canon EOS 5D Mark IV
Exposure Time: 32/10
Aperture: f/2.0
ISO: 1600
Date Taken: 2017:10:26 23:48:36
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Im in my 4th year as an aurora guide and Id been North before that on 3 trips to see the aurora. But in the 100s of auroras and geomagnetic storms Ive seen and photographed Ive never seen a blue aurora, until tonight.

My new guests arrived tonight for a Lights Over Lapland Autumn Aurora Tour and I had a feeling that things might land early. During the meal I popped my head out of the Abisko Mountain Lodge just as it was getting dark. I had to run into the lodge and grab the guests to get them out and then ran to the van to grab my camera.

There was clearly visible to the naked eye a blue aurora and a green aurora side by side. It wasnt just a flash either, they were both in the sky for at least 15 minutes (possibly longer). What was also obvious, although both were moving, the green aurora was moving quicker than the blue aurora.

Ive seen auroras which have shown different hues which may have been due to discrepancies with white balance but as this one is side by side to a green aurora and you can see the difference with the darkening sky Im 100% this was not because of white balance.

Was also a fairly short exposure of 3.2 secs at iso 1600 and f/2.0.
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Ionized nitrogen in the upper atmosphere causes the extremely rare blue aurora. Im happy you could capture it, it was also visible on the webcam of Light Over Lapland!
Posted by LandyGyebnar 2017-10-26 19:47:37
The blue color comes from the trail of Russian ballistic test missle Topol-M, wind blew the trail towards west.
There are several reports of observing Blue Aurora from russian amateur astrophotographers.
Posted by rmerzlyakov 2017-10-27 04:48:09
Ruslan might be right:
Posted by LandyGyebnar 2017-10-27 10:04:42
80 thumbs up
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