Western sky


The western sky is associated with sunsets — also grand haloes. 

This evening’s sky had a group of haloes. They were not the best I had seen, but they were eminently satisfactory. There was a modest 22° halo, an upper tangential arc, and (best of all) a grand circumzenithal arc.

The western sky before sunset shows haloes. The circumzenithal arc is near the centre top.

The circumzenithal arc varied in intensity and colour quality, but this is one of its better views.


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