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Optical Effects
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Remnants of a non-convective Asperitas cycle, as observed and reported by Yashraj, beginning as structural gravity waves at the base of Cumulus congestus, evolving into honeycomb patterns, and dissipating as they interact with the dry, high-heat plateau terrain over Guna, Madhya Pradesh, India
Undulatus inluenced by the Föhn winds, spotted near St. Anton am Arlberg, Austria
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Undulatus spotted over Conwy, North Wales
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A plethora of Altocumulus lenticularis spotted over Helena, Montana, US
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Altocumulus lenticularis spotted over Momochihama, Fukuoka City, Japan
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Undulatus spotted at sunset over Torrejón de Ardoz, Spain
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A mixed sky over Hocksauerlandkreis, North Rhine-Westphalia, Germany
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Altocumulus lenticularis spotted over Khomeynishahr City, Esfahan, Iran
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Altocumulus undulatus spotted over Pietracorbara, Cap Corse, France
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Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Blairgowrie, Perthshire, Scotland
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A mixed sky with signs of a Circumhorizon Arc, spotted over Bushy Park, London, England
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Asperitas spotted over Pullman, Washington, US
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Asperitas spotted over Hohnstein, Saxony, Germany
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Asperitas and signs of lacunosus spotted over Dartmoor, Devon, England
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Altocumulus lenticularis spotted over Rothiemurchus, Scotland
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Asperitas and signs of lacunosus spotted over Marion, Iowa, US
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