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Dim Red & Green Auroral Arcs (Feb 26, 2022).jpg

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A dim aurora from the Churchill Northern Studies Centre, in Churchill, Manitoba on February 26, 2022. This aurora was at Kp1 level (very low) and appeared only as featureless grey arcs to the eye. But the camera picked up unusual red colouration, and even some yellow-oranges, along with the more normal greens. The reds are odd for such a low-level aurora as the oxygen reds typically appear only when the aurora gets very active and energetic. The display did brighten later this night when it took on the more classic green arcs, with occasional lower fringes of nitrogen pinks. But at the start of the night the reds dominated.

The Big Dipper is at top centre. Vega is at bottom left. Arcturus is a bottom right.

This is a single frame with the TTArtisan 11mm full-frame fish-eye lens at f/2.8 for 30 seconds with the Canon Ra at ISO 3200.
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© Alan Dyer/AmazingSky.com
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2022 Churchill Auroras, Aurora
A dim aurora from the Churchill Northern Studies Centre, in Churchill, Manitoba on February 26, 2022. This aurora was at Kp1 level (very low) and appeared only as featureless grey arcs to the eye. But the camera picked up unusual red colouration, and even some yellow-oranges, along with the more normal greens. The reds are odd for such a low-level aurora as the oxygen reds typically appear only when the aurora gets very active and energetic. The display did brighten later this night when it took on the more classic green arcs, with occasional lower fringes of nitrogen pinks. But at the start of the night the reds dominated. <br /> <br /> The Big Dipper is at top centre. Vega is at bottom left. Arcturus is a bottom right. <br /> <br /> This is a single frame with the TTArtisan 11mm full-frame fish-eye lens at f/2.8 for 30 seconds with the Canon Ra at ISO 3200.