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Ursa Astronomical Association

Quiet aurora band - 16.3.2020 at 20.45 Vaasa, Strömsö Observation number 89033

Visibility II / V

Timo Alanko, Vaasan Andromeda

I went to Strömsö beach to photograph the zodiac light when the forecasts promised to be clear. However, as the sky darkened, it clouded at the same time. According to Spaceweather, the repo values were somewhat elevated, so I then moved to the boat side to try my luck with them. There they were in the direction of Raippaluoto. The western edge of the repos looked a little purple on the camera screen, but a little less on the computer screen. The beams of the floodlights on the pylons of the Raippaluoto bridge protrude at the edge of the repos as a light glow. Even today, the zodiac light should have been quite representative when it tried to shine through the clouds in the region of Venus and the Pleiades ... Lastly, a landscape planet image of Venus and a few stars with bridges from the beach.



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Additional information
  • Aurora brightness
    • Dim auroras
  • 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.

    • Violet auroras info

      Usually in Lapland or even in the south you can see purple auroras in stronger aurora shows. The most common color in auroras along with green and red.

Comments: 3 pcs
Tero Sipinen - 17.3.2020 at 10.03 Report this

Näkyikö violetti paljain silmin?

Timo Alanko - 17.3.2020 at 17.28 Report this

Reposet olivat muutenkin melko himmeät. Jotain kajastusta siellä oli. Tuskin olisi noteerannut, ellei olisi kuvissa näkynyt. 

Tero Sipinen - 17.3.2020 at 18.13 Report this

Ok. Kysyin siksi, koska lomakkeella kysytään paljain silmin nähtyjä värejä ja kertomuksesta oli tulkittavissa, että violetti näkyi pelkästään "konenäon" voimin. (Joskus jo vuonna kivi ja keppi esitin että kyseistä sanaparia voisi korostaa jollain tavalla lomakkeella, kun vaikuttaa toisinaan jäävän huomiotta :)

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