Changing 22 degree Halo

This halo started with fairly strong upper and lower tangent arcs joined up by a weaker 22 degree halo. The right edge is a bit obscured by the vertical streak of cirrus.

5 minutes later the upper tangent was brighter and more colourful, but the 22 degree halo had almost disappeared.

90 minutes later a completely different type of cirrus moved in, giving this smooth but almost colourless halo.

Composite of 2 images.

Canon EOS 20D   9th May 2009
Wiltshire, England

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