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Other Clouds
- Arcus
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Optical Effects
- 22° Halo
- 46° Halo
- Circumhorizon Arc
- Circumscribed halo
- Circumzenithal Arc
- Cloudbow / Fogbow
- Corona
- Crepuscular rays & shadows
- Diffuse arcs
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- Parry antisolar arcs
- Parry arc
- Parry infralateral arc
- Parry supralateral arc
- Rainbow
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- Sub-sun
- Suncave parry arc
- Sun dog (Parhelion)
- Sun pillar
- Supernumerary bows
- Subparhelic circle
- Supralateral arc
- Upper tangent arc
- Wegener arc
A colourful display of what appears to be a circumhorizon arc, spotted over Newcastle, New South Wales, Australia
Circumhorizon Arc along with virga in the distance, spotted while driving on I-90 in Montana, US
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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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