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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Diffuse glow - 9.5.2023 at 01.06 Helsinki Observation number 115918

Visibility I / V

The storm appeared as a gentle splash. Pictures two and three are references on both sides of the first picture. We admire the last shows, already after two the sky starts to clear.

Edit. I added pictures 4 and 5. There is something in picture 4 at 1:12, but the unstructured gauzes on the horizon in the heavily edited pictures are too vague to identify. Edit 2. I checked the time stamps of the pictures. The camera was 29 s behind -> the more accurate time of the first photo is 1.06.00 +/- 1 s.

More similar observations
Additional information
  • Aurora brightness
    • Can only be seen in photos
  • Observed aurora forms
    • Veil info

      Veil is the most bland and very common form of aurora. It usually covers its homogeneous dim glow over a wide area of the sky at once. Most often, the veil is seen in the calmer and quiet phase of the night after the aurora maximum as a background for other forms. The veil can also occur alone and in that case it will be quite difficult to reliably identify as an aurora, especially at a observation site which has a lot of light pollution.

      A similar glow of light can also be caused by airborne moisture, smoke, or a very thin layer of clouds that reflects the light that hits them. However, clouds can also be used to identify veil, especially if the middle or upper cloud appears dark against a lighter background, then it is very likely to be aurora veil if the brightness of the background sky is not due to the rising or falling Moon or Sun. When photographing, very long exposure times usually reveal the green colour of the veil auroras.

      Veil and rays. Photo by Esa Palmi.

      Red aurora veil. Photo by Marko Mikkilä.


      Veil. Photo by Milla Myllymaa.


      Aurora veil that changes color from green at the lower edge through purple to blue at the top. Photo by Jaakko Hatanpää.


      Dim green veil. Photo by Jarmo Leskinen.


      Radial aurora band surrounded by veil. Photo by Jussi Alanenpää.

Comments: 2 pcs
Mikko Peussa - 9.5.2023 at 12.52 Report this

Aika hyvin bongattu ottaen huomioon Helsingin seudun valoisuuden.

Pentti Arpalahti - 9.5.2023 at 13.26 Report this

Joo  jos olisi seeing ollut vähänkin huonompi tai kaukolämmön savut kulkeneet itään, niin ei olisi onnistunut. Ilman tukihavaintoja olisi ollut siinä ja siinä, että rapsa olisi lähtenyt ylläpidon päänvaivaksi.

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