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Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

All-sky aurora - 23.2.2015 at 21.30 Inari Observation number 33936

Visibility V / V

Pyry Ekholm, Pollux, Aalto-yliopisto

Bright northern lights in Ivalo, photographed through a thin gauze cloud. The brightest phase lasted seconds and featured white, red, and green. The brightest phase image was overexposed. A green reflection was visible against the ground. Strong and fast moving Korona.



More similar observations
Additional information
  • Aurora brightness
    • Bright auroras
  • Colors with unaided eye and other features
    • Red coloration of the shapes top info

      Auroras which have red top part that can be seen with naked eye are most often observed in the bands and long rays. In this case the lower parts are usually green. If the upper parts are in sunlight, red may be stronger than green. This shade of red is due to the discharge of the excitation state of the atomic oxygen.

      Aurora that shift to reddish towards the top. Photo by Karri Pasanen. 

      Red top in a aurora band. Photo by Simo Aikioniemi.

      Red at the top of the aurora. Picture of Tom Eklund.

    • 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.

  • Observed aurora forms
    • ;Form not identifiable;Corona;Arc
Comments: 2 pcs
Marko Pekkola - 1.3.2015 at 22.45 Report this

Jokseenkin aavemaista. Hieno havainto.

Marko Myllyniemi - 6.3.2015 at 17.42 Report this

Tekee aika hienon efektin tuo ohut pilvikerros!

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