Iridescence Or PSC?

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Iridescence or PSC?
Taken by Alan C Tough on December 31, 2025 @ Elgin, Moray, Scotland, UK

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Camera Used: Canon Canon EOS 6D
Exposure Time: 1/400
Aperture: f/16.0
ISO: 100
Date Taken: 2026:01:06 20:48:51

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Details:

Spotted through a small gap in low-level tropospheric cloud. Unlikely to be Polar Stratospheric Clouds, although they were spotted in Iceland on the same day and the Ozone map shows a narrow band of low Dobson Units extending from Iceland down to the north of Scotland: ozonewatch.gsfc.nasa.gov/Scripts/big_image.php?date=2025-...

Photographer's website:

https://www.flickr.com/photos/7776810@N07/

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