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Other Clouds
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Optical Effects
- 22° Halo
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Circumhorizon Arc along with virga in the distance, spotted while driving on I-90 in Montana, US
Circumhorizon Arc, which is an optical effect that is caused by ice crystals in the sky acting as tiny prisms that refract and reflect the light, and it appears as a bright, flat band of colours parallel to the horizon. When cirrus clouds are present, they act as a canvas for the circumhorizon arc, causing it to become fragmented. This classic example was spotted over Rosenheim, Germany.
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A subtle circumhorizon arc spotted over Reigate, England
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A unique juxtaposition of what appears to be a Cavum (Fallstreak Hole), along with a Circumhorizon Arc, spotted over Cape Coral, Florida, US
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Circumhorizon Arc over Mammoth Lakes, California, US
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Circumhorizon Arc over Beijing, China
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Both a corona and what appears to be a partial circumhorizon arc over Napa, California, US
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Circumhorizon Arc and 22-degree halo in a dual halo event over Smithville Lake, near Kansas City, Missouri, US
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Cirrus uncinus, along with a faint circumhorizon arc, spotted by Alan's sister in Vancouver, British Columbia, Canada
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Circumhorizon Arc over the Olympic Mountains as seen from Sequim, Washington, US
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Circumhorizon Arc over Portola Valley, California, US
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Circumhorizon Arc with a blue emphasis spotted over The Villages, Florida, US
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Circumhorizon Arc over Lakewood, Washington, US
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A circumhorizon arc over Durras North, NSW, Australia.
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A circumhorizon arc over the Cascades, Washington, US.
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A circumhorizon arc displayed in a contrail over the French Alps.
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