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Optical Effects
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Callantsoog Beach, Holland.
Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Burton on Trent, England
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Fog spotted by Alina Payne, from the Settignano Hills over the valley in Florence, Italy
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Virga spotted over Allendale, Michigan, US
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A classic example of a rare horseshoe vortex spotted over Roanoke, Virginia, US
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A layer of altocumulus above what appears to be low-lying stratus clouds formed via homogenitus, as a result of the nearby power plant and a variety of particles that act as condensation nuclei. This view overlooking Uskmouth Power Station, South Wales, is from Portishead, Somerset, England.
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A view from above the clouds, of a layered "field" of low-lying clouds, with a textured or rolling appearance, giving the indication that this is a layer of stratocumulus clouds, spotted during a flight over Albania
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Autumn view of Altocumulus stratiformis, spotted from Pinnacles Youth Park, Boone County, Missouri, US
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A blend of colours over Medford, Massachusetts, US
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Sunrise over San Leandro, California, US
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Altocumulus lenticularis spotted over Gardner, Massachusetts, US
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Stratus fractus spotted over Isle of Skye, Scotland
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Sunset over Chico, California, US
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A storm developing over Northwest Iran
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Crepuscular rays over Esfahan, Iran
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Pyrocumulus cloud in its early development, as spotted here by Linda's niece, is the result of Volcán de Fuego, one of Central America's most active volcanoes, located near Antigua, Guatemala
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