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Optical Effects
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Altocumulus lenticularis duplicatus near Brighton, Colorado, US
A roll cloud, which is a form of an arcus cloud, spotted near the North West Shelf off of Western Australia
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A unique perspective of a 22-degree halo, with a bee-fly visiting a poppy in the foreground, near Selma, Oregon, US
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Altocumulus lenticularis duplicatus, which is also known via the French term, 'pile d'assiettes', for a 'stack of plates'. This classic example was spotted over Lake Peak in the Sangre de Cristo Mountains, near Santa Fe, New Mexico, US.
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Altocumulus lenticularis, along with lenticularis that appear to be at the stratocumulus level in the background, spotted near Torres Del Pine, Patagonia, Chile
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A classic example of a fallstreak hole (cavum) spotted amidst an expansive display of altocumulus clouds over Lot, Occitanie, France
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Altocumulus undulatus over London, England
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Altocumulus undulatus radiatus over Nokonoshima Island, Fukuoka City, Japan
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Altocumulus undulatus over Fleet, Hampshire, England
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Mamma (Mammatus) spotted over Las Vegas, Nevada, US
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Circumzenithal Arc spotted by Moriah's 11-year-od brother, Anthony, who captured this image near Antelope Valley, California, US
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Cavum (Fallstreak Hole) spotted over Lynchburg, Virginia, US
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Horseshoe Vortex spotted over Chester County, Pennsylvania, US
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Crepuscular rays shining through rising fog, spotted near Eugene, Oregon, US
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Fluctus (Kelvin-Helmholtz) spotted near the Golden Gate Bridge in San Francisco, California, US
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Pyrocumulus (Flammagenitus) as a result of a recent lava flow in 2024 in the Reykjanes Peninsula, near Reykjavik, Iceland
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