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Ursa Astronomical Association

Half-sky auroras - 18.3.2015 at 01.30 Kotka Observation number 34632

Visibility IV / V

Minna Rissanen, Ursa (Etelä-Suomi)

With the naked eye, the repos were mostly white, with a hint of green, the color is a little better in the pictures. My eyes looked pretty bright, but on the other hand, this was the first time I saw the northern lights with my own eyes - so there is really no point of comparison.

The fire in the quarter had already dimmed the fourth picture, and after five minutes nothing was visible.

It’s a shame not to get a wider view of the sky from that balcony when the trees and roof come to the road, but something nonetheless. The focus is just what hurts, I was too busy to describe that I would have had time to adjust anything other than the exposure. There is also a bit of image processing there.

More similar observations
Additional information
  • Observed aurora forms
    • 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.

    • White auroras info

      Paljain silmin valkoinen väri näkyy useimmiten himmeissä näytelmissä, kun silmä ei kykene erottamaan mitään varsinaista väriä. Harvoin kirkkaissa näytelmissä valkoinen väri voi myös syntyä sopivista vihreän, punaisen ja sinisen yhdistelmistä.

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