Half-sky auroras - 15.3.2016 at 23.10 - 16.3.2016 at 03.30 Muonio Observation number 49937

Copyright © 2016 Mika Turdén. All rights reserved.

Visibility IV / V

Mika Turdén, Ursa (Helsinki)

On Tuesday, the heat wave brought by the Föhntues and the Gusts took the rest of the cannon shelters from the trees of the fells, but even during the trip they had to deviate on the slopes of Pallas - Luva when there was a Tuesday-Wednesday night G1-level repos. However, the gusty 20m / s gusts of wind quilted snowshoeing very far from the lower slopes.

In the sky began to happen after midnight, half the lifelines of one of the countries rose to the crown. Next, a really bright two-line belt appeared from the northwest, with strong waves. From now on, the action around the sky was mostly so hectic that it didn’t get cool for the photographer to swarm in every direction. Even the small cloud boards did little to bother, except in the Korona shots.
At the end of the night, a striking feature was the very fast flickering of light, relatively dull spots and swirls, and the images also showed a hint of pink.

Half of the four countries had to be handed over when the fires faded a little - Great night.

This description has been automatically translated from Finnish. Click here to see the original text.

7 9

Additional information

Aurora brightness
- Bright auroras
Colors with unaided eye and other features
- Pulsating auroras
  
  Pulsating aurora. The brightness of the pulsating aurora usually varies rhythmically over a period that can be only a fraction of a second at its fastest, but can also be several minutes. Pulsing usually only occurs in(strong auroral conditions) higher quality shows , especially towards the end of them. However, the pulsation may be followed by yet another eruption. Sometimes the variation in brightness is at the same stage in the whole form, whereby the whole form "turns on and off" at the same time. Pulsation is also found in arches and bands, but above all in spots..
- Red coloration of the shapes lower edge
  
  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
  
  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.
- White auroras
  
  Paljain silmin valkoinen väri näkyy useimmiten himmeissä näytelmissä, kun silmä ei kykene erottamaan mitään varsinaista väriä. Harvoin kirkkaissa näytelmissä valkoinen väri voi myös syntyä sopivista vihreän, punaisen ja sinisen yhdistelmistä.
- 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.

Observed aurora forms
- ;Rays;Band;Corona;Arc

Technical information

Canon EOS 6D, Samyang 14mm

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