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Ursa Astronomical Association

Auroras seen through breaks in the clouds - 14.10.2021 at 22.28 - 15.10.2021 at 03.08 Taipalsaari Observation number 101811

Visibility III / V

On Wednesday, Cloudiness agreed to give way a bit and because the reposimeters looked promising, I set off. When I got to my hut, a small boat shore, light was clearly visible from the cracks in the clouds, which turned out to be northern lights in the cloud cage. I took a few pictures and decided to move elsewhere hoping the sky would open up a little more. Well, it didn't open but it started to rain, the little deaf and was in a cloud all the time. I decided to drive home, but stop to check the situation at the first hitchhiking spot. It was worth stopping, because there the arch shone bright again on the horizon. I followed the arc and gauges from 0.40 to 3.08, but didn't get a storm. The first picture was taken at 10.28 pm, the second at 0.44 am and the third at 2.34 pm

More similar observations
Additional information
  • Aurora brightness
    • Bright 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.

  • 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.

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