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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Active aurora band - 4.10.2022 at 23.56 - 5.10.2022 at 02.27 Kokkola Observation number 109770

Visibility III / V

It's been a long time since we were able to light fires in this part of the west coast. The previous night went wrong because the beach was completely closed just when the fire appeared. However, this time we were lucky.

Before leaving for the evening shift, I packed the camera backpack in the car, because I had a feeling that something might be visible in the sky in the coming night. Just when the work shift ended around 11:15 p.m., it started to seem like the clouds are finally leaving Kokkola. I was thinking about a possible place to ride and I thought of driving inland, if there was a starry sky visible. However, I hooked through a nearby swimming beach and there were nice aurora lights sticking to the camera cell. New plans, and quickly to the nearest somewhat dark place to ride, a few kilometers away.

There was a raft of clouds on the horizon and for a moment it looked like the clouds would gather again to cover the northern sky, but they disappeared as quickly as they appeared. For almost three hours, faint, but clearly visible aurora borealis came and went. The place is not the most optimal, because the port, which is located nearby, produces quite a bit of light pollution over the water, but for this, it is a great place to hang out. However, it would have taken almost an hour to move to better places.

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.

    • Pulsating patches info

      Pulsating patches or -aurora typically have more or less regular shape and size. They typically appear in the later part of an aurora display. They are almost always pulsating in variable periods.

  • 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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