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User / HPHson / Silfurský / Silver Clouds / Noctilucent Clouds
Hallgrimur P. Helgason / 916 items
These are tenuous cloud-like phenomena some 80 km up and made of ice.
They can be seen in deep twilight in the North direction when illuminated by sunlight from below the horizon.
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Dates
  • Taken: Aug 14, 2014
  • Uploaded: Aug 7, 2016
  • Updated: Sep 2, 2020