Eye-catching night shining clouds - 3.8.2021 at 23.50 - 4.8.2021 at 01.21 Ikaalinen, Sisättö Observation number 100212

Visibility V / V

Heidi Rikala, Ursa (Helsinki)

The handsome night cloud show slowly began to rise before midnight. The clouds brightened in the clear sky and rose higher and higher. I would already describe these as eye-catching. The air was pretty cool at about 7 degrees. #bongaa100

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Additional information

Havainto
- Night shining clouds
Cloud coverage in the sky
- Covered 1/8 of the sky
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.
- 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.
- 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
- Eye-catching night shining clouds

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Eye-catching night shining clouds - 3.8.2021 at 23.50 - 4.8.2021 at 01.21 Ikaalinen, Sisättö Observation number 100212