RAGDA Proton Aurora?
Taken by Alan Dyer on February 14, 2026 @
near Gleichen, Alberta, Canada
Click photo for larger image
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Camera Used: NIKON CORPORATION NIKON Z 8
Exposure Time: 30/1
Aperture: f/2.8
ISO: 800
Date Taken: 2026:02:15 09:17:24
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Details:
Here are two images taken moments apart at about 7:18 pm MST on February 14, with a Kp4-5 aurora underway with a classic arc of green with red vertical rays to the north.
But to the south and crossing overhead was what looked like a grey arc to the eye but in photos showed as diffuse green blobs with a tinge of red.
This is likely a proton aurora and an example of a RAGDA, a Red Arc with Green Diffuse Aurora. It was short-lived and was gone only 5 to 6 minutes later.
One image is looking north, the other looking south but both extend up to the zenith.
This was from southern Alberta, Canada. With a 10mm full-frame fish-eye lens.
Photographer's website:
https://www.amazingsky.com
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