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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Quiet aurora arc - 29.8.2022 at 23.50 - 30.8.2022 at 00.30 Kokkola Observation number 108947

Visibility II / V

The sky was nice and even though the gauges didn't really promise anything, I thought of heading towards the beach.

Vaisu aurora borealis, which was distinguishable even with the naked eye. Sometimes even a little life in the arc. The reflections were so well in place after the water line receded that I would have wished for a little bigger lights.

More similar observations
Additional information
  • Aurora brightness
    • Dim auroras
  • Observed aurora forms
    • Arc info

      ARC The arcs are wider than the bands and do not fold as strongly. The arcs are normally neither very bright nor active.

      The arc is probably the most common form of aurora. When aurora show is a calm arc in the low northern sky it often doesn’t evolve to anything more during night. In more active shows the arc is often the first form to appear and the last to disappear.

      The lower edge of the arc is usually sharp but the upper edge can gradually blend into the background sky. As activity increases rays and folds normally develop, and the arcs turn gradually into bands.

      An aurora arc runs across the picture. Vertical shapes are rays. Photo by Atacan Ergin.

      Aurora Arc. Photo by Mauri Korpi.

      Aurora Arc. Photo by Anna-Liisa Sarajärvi.

      Aurora Arc. Photo by Matti Asumalahti.

    • Band info

      Bands are usually narrower, more twisty at the bottom, brighter, and more active than arches. Bands usually develop from arches.

      Bands can form J and U shapes, sometimes even full spirals. The corona can also arise from bands. Bands are a fairly common form of aurora.

      Aurora band. Photo by Merja Ruotsalainen.

      Aurora band. Photo by Matias Takala.

      Aurora band. Photo by Lea Rahtu-Korpela.

      Aurora bands. Photo by Lauri Koivuluoma.

      Aurora band. Photo by Matias Takala.

  • Colors with unaided eye and other features
    • Green auroras info

      Green, seen with the naked eye, is one the most common colors of the aurora. The green color is derived from atomic oxygen.

      Green auroras. Lea Rahtu-Korpela.

      Green auroras. Photo by Juha Ojanperä.

Comments: 2 pcs
Jukka Kytömäki - 30.8.2022 at 15.37 Report this

Kauniit kuvat. Näistä lähes himmeistä reposista saa useasti parempia maisemakuvia ja maisemayksityiskohdat erottuvat paremmin. Myös meteorit yms.

Sami Mutka - 30.8.2022 at 19.55 Report this

Kiitos! ???? Tuo on totta. Pystyy vähän pidempään valottamaan, eikä pala puhki.

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