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Optical Effects
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Iridescence spotted over Sacramento, California, US
Crepuscular rays producing a spotlight in the sky over Northwest Iran
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Circumzenithal Arc spotted over Amenia, New York, US
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Stratocumulus along the horizon, with subtle signs of limited iridescence, spotted over Zhongzheng District, Taipei City, Taiwan
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Iridescence, along with crepuscular rays and shadows, spotted over Central Province, Iran
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'Cotton Candy' clouds with iridescence, spotted over Medford, Massachusetts, US
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Crepuscular rays and iridescence spotted over Mahajeran, Northwest Iran
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Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Burton on Trent, England
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A mesmerizing view of altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Rossford, Ohio, US
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Iridescence amidst a mixed sky over Vallejo, en route to San Francisco, California, US
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Iridescence upon altocumulus clouds over Cherry Hill, New Jersey, US
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Altocumulus spotted over Zhongli, Taoyuan, Taiwan
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Iridescence spotted over Twisp, Washington, US
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Altocumulus highlighted by a bright moon, spotted over Sandusky, Ohio, US
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Altocumulus spotted over Pietracorbara, Corsica, France
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A classic example of a fallstreak hole (cavum) within a layer of altocumulus, with signs of iridescence near the leading edge of the descending ice crystals, spotted over Lyons, Oregon, US
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