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Optical Effects
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Altocumulus undulatus radiatus spotted by Lucien's friend, Matt Bennett, over Gold Coast, Australia
Altocumulus undulatus radiatus spotted over West End, Brisbane, Australia
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Altocumulus undulatus radiatus spotted over Taringa, Queensland, Australia
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A stunning winter sunset over Nulkaba, Hunter Valley, New South Wales, Australia
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Flying above the clouds over St. Marks Wildlife Refuge, Florida, US
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Altocumulus over Taoyuan City, Taiwan
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An expansive display of altocumulus over Santa Rosa, California, US
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Undulatus at two different levels of the atmosphere, spotted over Selsey, England
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Reflections of altocumulus lenticularis over Mirror Lake, Lake Placid, New York, US
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Multiples examples of cumulonimbus incus, also known as anvil clouds, along with a lower layer of altocumulus undulatus, as seen from 37,000 feet above Mississippi, US
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Undulatus at sunset over Vermontville, Adirondacks, New York, US
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A colourful sunset over Northern California, US
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Altocumulus lenticularis undulatus spotted over Isle of Lewis, Scotland
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The sheep didn't appear to be interested in the plethora of altocumulus lenticularis over Priddy, Somerset, England
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Altocumulus with signs of iridescence over Rye, East Sussex, England
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Asperitas following a storm over Bismarck, North Dakota, US
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