Halo, Upper Tangent, Sundog and Circumzenithal Arc

Another afternoon with a mixture of halo effects in different patches of cirrus. This started with a weak 22 degree halo in some rather mottled cirrus, never quite making a full circle.

This was followed by a very bright and colourful sundog with a distinct white tail.

Then a colourful upper tangent arc developed, with part of the 22 degree halo curving down to the right.

The show finished with this faint circumzenithal arc.

Canon EOS 20D   30th May 2010
Wiltshire, England

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