Circumzenithal Arc

Left: This circumzenithal arc was visible for over half an hour. Here a cloud conveniently blocks out some of the glare from the sun.

Bottom Left: The sun altitude was 22 degrees when this image was taken and most of the arc is visible. Unfortunately it was a fairly hazy afternoon which reduced the contrast.

Bottom Right: A little later the arc started to brighten, but was more broken. Lower level cloud then moved in and blocked the view, by the time it cleared the arc was gone.

Canon EOS 20D   22nd April 2006
Wiltshire, England

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