Clearly visible night shining clouds - 9.8.2022 at 23.25 - 9.8.2022 at 23.45 Helsinki, Pornaistenniemi Observation number 108970

Visibility III / V

Veikko Mäkelä, Ursa (Helsinki)

Night clouds once more. A surprisingly clear play from the beginning of the night. A belt, a wave and a vortex in an area about 60 degrees wide between the northwest and the north.

at 23:45
azimuth: 300-0
height: 3-15
forms: I, IIab, IVc
brightness: 1-3
colors: S

Processed photos later.

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Additional information

Havainto
- Night shining clouds
Brightness of the noctilucent clouds
- Clearly visible night shining clouds
Cloud coverage in the sky
- Very small area

Noctilucent clouds
- 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.
- Band
  
  Bands of noctilucent clouds are long, stripe like cloudformation.
  
  A single, very bright NLC band. Photo by Mikko Peussa.
  
  On the upper left corner, rising bands are clear on the image. Whereas waves of NLC cover the bottom right side of the image. Photo by Juha Tonttila.
- 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.

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Clearly visible night shining clouds - 9.8.2022 at 23.25 - 9.8.2022 at 23.45 Helsinki, Pornaistenniemi Observation number 108970