Sub-Sun and Sub-Parhelia Over Southern Canada

June 04, 2007

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Provided by: Bill Burton, U.S. Geological Survey
Summary authors & editors: Bill Burton

This photo showing an impressively bright sub-Sun and sub-parhelion was taken from the window of a commercial airliner on a flight from Anchorage to Minneapolis. I was looking down at a thin, cirrus cloud layer over the snow covered farmland of southern Canada when these wonderful halos and arcs appeared. The Sun is above the image, producing this sub-Sun and upward-facing portion of a 22-degree halo (on the left side of the image). This sub-Sun was brilliant enough to create its own sub-parhelion and 22-degree arc -- on the right side of the image. A corresponding sub-parhelion was to the left of the sub-Sun as well. Photo taken on January 11, 2007.

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