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Contact information

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

Ursa Astronomical Association

Half-sky auroras - 15.9.2005 at 23.00 Inari Observation number 44215

Visibility IV / V

Juha Kinnunen, Jyväskylän Sirius

Memories from 10 years ago: a fairly ordinary northern lights show in Inari, seen from the West Bank of Lake Ukonjärvi.



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: 2 pcs
Tero Sipinen - 16.10.2015 at 22.49 Report this

Hienoja muistoja!

Arvelin vuosiluvun perusteella, että olisiko peräti filmikameralla otettuja. No, tavallaan :)

Juha Kinnunen - 16.10.2015 at 23.24 Report this

Kyllä vaan, siitähän se rupesi filmi vääntymään digiksi, kirjaimellisestikin :-) Tuo oli kylläkin laina-apparaatti tälle retkelle. 

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