Cloud Corona Over the SIerra Nevada

July 06, 2022


Photographer: Roberta Piazza Gordon
Summary Authors: Roberta Piazza Gordon; Cadan Cummings

Shown above is a cloud corona spotted on a spring morning in the Sierra Nevada mountain range of California. Coronae are formed when cloud droplets diffract incoming light from the Sun or Moon, which produces a colorful region of light interference. Typically, the most vividly colored coronae are produced by tiny cloud droplets that are uniform in size. Remember to always take safety precautions when viewing the Sun. Photo taken on March 15, 2022.

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