Clearly visible night shining clouds - 16.8.2015 at 01.15 - 16.8.2015 at 02.00 Aura Observation number 41013

Visibility Unclassified

Jukka Hilska

Night clouds in the northern sky, a dim northern light belt

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Additional information

Havainto
- Night shining clouds
Cloud coverage in the sky
- Very small area
Noctilucent clouds
- Swirl
  
  Swirls are curved night shining cloud forms. For example, a single night cloud belt or group of waves may be curved on a clear bend.
  
  The arrow indicates a slight vortex in the night cloud belt. Photo by Joni Tahkoniemi.
  
  Strong swirls in image taken by Veikko Mäkelä.
- Waves
  
  Waves of noctilucent clouds are short, close groups of clouds.
  
  Wavy NLC by Jari Luomanen.
  
  NLC waves by Hannu Määttänen.
- Veil
  
  The night cloud vail is a vague thin night shining cloud with no clear structure.
  
  Noctilucent cloud veil with one strong belt formation. Image by Veikko Mäkelä.

Brightness of the noctilucent clouds
- Clearly visible night shining clouds

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Clearly visible night shining clouds - 16.8.2015 at 01.15 - 16.8.2015 at 02.00 Aura Observation number 41013