Active aurora band - 10.2.2022 at 21.22 - 10.2.2022 at 21.26 Lieto Observation number 104465

Visibility III / V

Sami Ruohonen

Inspired by the Finnish Meteorological Institute's northern lights radar, I went out to walk out the camera. In the pictures I took in the north direction, I noticed a northern lights gauze / northern lights arc, but a rather dilute one. As I turned back toward my home, a suddenly developing belt of northern lights lit up in the sky like I had never seen in these areas before. I took a few pictures with a 25-second exposure, after which the phenomenon had already subsided.

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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.

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Active aurora band - 10.2.2022 at 21.22 - 10.2.2022 at 21.26 Lieto Observation number 104465