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Ursa Astronomical Association
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00130 Helsinki

Ursa Astronomical Association

Eye-catching night shining clouds - 4.8.2021 at 01.30 - 4.8.2021 at 03.45 Sysmä Observation number 100189

Visibility V / V

Arja-Sisko Airila, Ursa (Etelä-Suomi)

I watched from the sky cameras after midnight that there were illuminating night clouds in the low north. At first I didn’t think to go at all to describe them when they were so low. Shortly before two o'clock, however, the night clouds had brightened and risen somewhat higher, so I took the camera with me and headed to the edge of a nearby field opening to see what the night clouds in the sky looked like. At that time, they were still in a low northeastern small area. Clear belts were visible in the northeast. After taking some pictures, I went back inside.

At three o'clock I went to the yard again to look at the situation and by that time the night clouds had already risen to the zenith, covering half of the sky from west to east. Bright belts in the west-northwest sky. Funny herringbone waves and strange vortices in the high northern sky. The morning sky was already starting to lighten at four o'clock, the night cloud belts were still visible. The night was bright, clear, light breeze, temperatures +10. But the mosquitoes started to be annoyed.

Pictures 1st northwest 03:21, 2nd north 03:30, 3rd north 03:31, 4th north-northeast 3:32, 5th northwest 03:33, 6th yard road depicted north 03:36.

The first shooting trip to the edge of the field Figure 7. Northeast 1:52, 8. Northeast 1:56.

More similar observations
Additional information
  • Havainto
    • Night shining clouds
  • Cloud coverage in the sky
    • Covered about half of the sky
  • Noctilucent clouds
    • Unusual forms info

      Relatively rarely, there are special shapes in the night shining cloud displays that do not belong to the shapes listed above. Such may be, for example, thick lumpy formations that appear as some kind of patches. They may also be associated with an unusual color tone.

    • Swirl info

      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 info

      Waves of noctilucent clouds are short, close groups of clouds.

      Wavy NLC by Jari Luomanen.


      NLC waves by Hannu Määttänen.

    • Band info

      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 info

      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
Technical information

Canon PowerShot

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