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Circumzenithal arc over Surrey, England

Circumzenithal arcs look like upside-down rainbows, but they’re caused by ice crystals, not rain. They’re sometimes seen with sundogs, and even full halos around the sun or moon.

Photo taken May 13, 2017 by Tony Bowman.

Tony Bowman in Surrey, England wrote on Sunday:

I captured this amazingly bright circumzenithal arc (aka: ‘upside down rainbow’) yesterday afternoon in the skies above Surrey, England. It was very bright and accompanied by a glorious sundog on one side, which was too bright for my phone to capture the colors.

Read more: Upside-down rainbow-like arcs

Deborah Byrd

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