Ice crystal halos with section of rare 46° degree halo
Taken by Jason Evans on July 14, 2016 @
Eastleigh, Hampshire, UK
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Details:
As I was waiting for my bus home I noticed that there was a impressive ice crystal halo display occuring.
The sundogs/Parhelia were the brightest ones I have seen, I could also see the upper tangent arc.
I was sure by the time I had got home so I could take some photos the display might have not been as strong, in fact by the time I got back it did seem as if the sundogs were less noticeable, and also some low level cloud had started to roll in and was partially obscuring one of the sundogs.
But the upper tangent arc seemed to be more intense
I looked higher and to my surprise I could see another rainbow like halo section, this was the circumzenithal arc, and despite that it is not a rare halo, it is the first time I have observed it.
Then I noticed an even more unusual halo much further out from the sun, the middle sections were brighter but in my photos I can see them extending right up to join at the circumzenithal arc. I checked on atoptics.co.uk and determined they were supralateral arcs, again I have never seen these before, but the biggest surprise was yet to come.
As I was looking at images of other types of ice halos I noticed there was one called a 46° halo, and then I checked my images again, sure enough I could make out a faint patch of colour which was just underneath the CZA, but was not part of it, you can see that it is separate, if not it would have been part of the supralateral arc.
I sent these images for Les Cowley to examine, and he has said yes! So as you can imagine I am delighted, 46° haloes might be seen on average once a year!
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