Dr. Thomas Kunzemann, May 10, 2024

At first I was quite disappointed by all the auroras, because it was very bright in the north and you could only see a few red auroras without structures. In addition, there was a thin layer of altostratus clouds.

Later I realized that the brightness in the north was not twilight at all, but the green part of the aurora. I've never seen it so bright. Then, of course, I was thrilled too. The whole sky was a bit diffuse reddened to the south, but this was only faintly visible.

For the pictures I used a Canon R system camera with a zoom lens at 24 mm focal length and aperture 4. Exposure was 10 to 30 seconds at 1600 ASA. The recordings were made between 20h45 and 21h45 UTC. The location was Preußisch Oldendorf, district of Offelten 52.31° north latitude and 8.520° east longitude in the open field.

AR 3664, the group of spots that caused the powerful auroras of the last few days, is no longer visible. But it continues to produce flares and beautiful postflare loops that float above the SW edge of the sun, where AR 3664 has disappeared.

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