On this occasion the 22 degree halo was visible and this image shows the relative positions of the two haloes.
Although it wasn't particularly bright the colours in the circumzenithal arc were noticeably purer than the 22 degree halo.
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The remains of a broad and colourful circumzenithal arc are at the top right. A rather fragmented 22 degree halo sweeps round to a bright sundog at lower left.
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