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July 8, 2011

Sun ring in Eugene, Oregon

by wordlesstech team

Sun halo

The American flag flaps in the breeze against the backdrop of a halo around the sun at the US track and field championships in Eugene, Oregon. These rings are caused by cirrus clouds and moisture as high as 30,000 feet where the temperatures are well below freezing. The moisture turns into ice crystals, and the sunlight then reflects off these ice crystals creating a halo or ring. Photograph Don Ryan

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