Auroral sub-arcs triggers and expansion
Taken by Alexandre LHOEST on February 12, 2018 @
Skibotn, Norway
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Camera Used: Unavailable Unavailable
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Details:
Here, some videos of auroras made in Norway.
All captures were made with a fisheye.
1° The first aurora is powerful enough to be filmed.
It is quite slow and the video here is accelerated 25x to cover 22 minutes.
2° Then, successive triggering of auroral sub-arcs takes over.
The expansion phase follows.
The whole process took about 6 minutes.
3° The triggering phase itself is very short. Everything happens in about 60 seconds, before the expansion takes over.
The following video is presented in real time. The exposure time is 1/4 seconds, hence the jerky appearance.
The link to the 3 viedos:
https://youtu.be/HoCnZOborkk
https://youtu.be/dwIi6nmxLEU
https://youtu.be/Heoc1QRsLv4
2018-Feb-12
Norway, 69°N
Sony A7s
Samyang 12mm Fisheye.
Photographer's website:
No URL provided.
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