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Contact information

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

Ursa Astronomical Association

Active aurora band - 29.3.2013 at 20.33 Jyväskylä Observation number 12719

Visibility III / V

Juha Kinnunen, Jyväskylän Sirius

Easter night lights in themed colors, starting at 8 pm ;-)



More similar observations
Additional information
  • Aurora brightness
    • Bright 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
    • Red coloration of the shapes lower edge info

      Red lower edge visible with the naked eye. The bands which are starting to level up their activity and are green colored have quite often a narrow red lower edge. This is the most common form of red color which is derived from molecular nitrogen.

      Aurora band with purple lower edge. Photo by Ilmo Kemppainen.

      The low hanging brightest aurora band is colored red at the lower edge. Photo by Tero Ohranen.

      Narrow purple reddish tones at the lower part of this aurora band. Photo by Merja Ruotsalainen.

      Purple band at the bottom. Photo by Panu Lahtinen.

    • 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.

Technical information

Nikon D800, 80-200mm f / 2.8 @ 80mm, f / 4.5, 2.5 sec, 1600 ASA

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