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

Ursa Astronomical Association

Quiet aurora arc - 9.12.2016 at 22.00 Rovaniemi Observation number 58805

Visibility II / V

Sari Pietikäinen, Corona Borealis, Rovaniemi

The sky brightened and I went to photograph the stars ... Well, on the way I noticed bright green northern lights, so I parked on the river bank to photograph them then. The stars are allowed to stay for the first time. :)



More similar observations
Additional information
  • Aurora brightness
    • Bright auroras
  • 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.

  • 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.

    • 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.

Comments: 4 pcs
Mikko Peussa - 9.12.2016 at 23.52 Report this

Komiat kiehkurat. Olishan se kiva joskus käydä pohjoisessa katsomassa. Täällä etelessä noi reposet on mitä on ;-)

Kari Rytilahti - 10.12.2016 at 07.33 Report this

Hienot kuvat Joulukuun reposista !  

Olli Sälevä - 10.12.2016 at 09.47 Report this

Kukanniemestä taitaa olla nuo kuvat? Kotoa tiirailin ikkunoista taivaalle puoleen yöhön asti, mutta eipä vain niillä kerroilla näkynyt mitään revontuliin viittaavaa. Olisi näköjään pitänyt ulkoistaa itsensä.

Sari Pietikäinen - 10.12.2016 at 10.10 Report this

Kiitoksia kiitoksia! 
Kukanniemi oli itselle outo nimi, mutta googlauksen jälkeen voin sanoa, että siellähän minä tosiaan olin kuvaamassa. :) Viirinkankaalla en nähnyt mitään taivaalla ja olinkin menossa kuvaamaan jotain ihan muuta Kroopinpaloon, kun nämä tulet pysäyttivät matkan varrella...

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