Circumhorizontal Arc (CHA)

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Circumhorizontal arc (CHA)
Taken by David Blanchard on April 27, 2026 @ Flagstaff, AZ

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Camera Used: NIKON CORPORATION NIKON D850
Exposure Time: 1/1000
Aperture: f/8.0
ISO: 64
Date Taken: 2026:04:27 14:17:31

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Details:

Briefly had a period with thin cirrus/ice clouds passing overhead producing a segment of a circumhorizontal arc. This occurred around local noon with the sun at an elevation of 69°, more than high enough for the effect.

Photos taken at 1217 and 1218 MST with a 17mm ultra-wide and 35mm wide angle lens.

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