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Optical Effects
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Cirrus over Speer, United States
Circumzenithal Arc over Buzancy, France
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Mamma (Mammatus) over Willow Grove, Pennsylvania, US
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Ruth's friend, Tony French, captured this developing Cumulonimbus over Montferrer in Pyrenees-Orientales, France
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Per Helen's description, after a winter storm over the mountains on the southern border of the Australian Capital Territory, Canberra, Australia.
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Mamma (Mammatus) during sunset over Pitman, New Jersey, US
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Crepuscular rays and shadows emanating from the west, as viewed from eastern Long Island, New York, US
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A murus formation associated with a storm system, accompanied by multiple lightning strikes, near Kittery Point, Maine, US
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Altocumulus stratiformis over South East London, England
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Fluctus (Kelvin-Helmholtz) over Belgrade, Montana, US
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Cirrus filled sky over Anglesey Abbey, Stow-cum-Quy, England
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Asperitas over Pellenberg, Belgium
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Shelf Cloud over Maumee, United States
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Cirrocumulus over San Luis Rey, United States
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Corona over Taoyuan, Taiwan
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Cumulus fractus over Najaf Ashraf, Iraq
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