Half-sky auroras - 7.9.2015 at 22.38 Kontiolahti Observation number 42136

Visibility IV / V

Tuomo Arovainio

Hardly from the sky when the northern lights predicted honey from the sky, and meteorologists clouded .... Well, we drove in the darkness of the night and looked for a suitable place to shoot. There were clouds everywhere, but here and there were open points lasting a few minutes. The car headed for the guy's cottage, where there happened to be a moment lasting in the clouds. Here is one picture of the catch of the evening, which was annoyingly small due to the clouds. Behind the clouds, he heated the green all night ...

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12 9

Additional information

Aurora brightness
- Bright auroras
Observed aurora forms
- Band
  
  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
  
  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
  
  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.

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Half-sky auroras - 7.9.2015 at 22.38 Kontiolahti Observation number 42136