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28.8 MB (794.7 KB compressed)
3888 x 2592 pixels
33.0 x 21.8 cm ⏐ 13.0 x 8.6 in (300dpi)
STEPHEN BURT / SCIENCE PHOTO LIBRARY STEPHEN BURT / SCIENCE PHOTO LIBRARY
A fallstreak hole, or hole punch cloud, in altocumulus clouds. Supercooled water droplets within the circular area of this cloud have turned to ice, perhaps as a result of an aircraft's passage through the cloud. As the ice crystals grow they fall to a lower altitude, leaving a hole in the cloud. The freezing effect ripples outwards expanding the hole. Photographed in Berkshire, UK.
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