Not sure
Taken by Nate Hale on February 17, 2014 @ Texarkana, TX
Click photo for larger image
  Camera Used: Apple iPhone 4S
Exposure Time: 1/2208
Aperture: f/2.4
ISO: 50
Date Taken: 2014:02:17 17:20:51
  
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Details:
Sun was going down. Lots of the Delta shapes were appearing above the Sun. Right after that big blast reported on space weather.
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Thats an upper tangent arc.

http://www.atoptics.co.uk/halosim.htm
Posted by GangnamStyle 2014-02-17 18:57:24
This is an awesome image of an upper tangent arc- so much color!
Posted by GangnamStyle 2014-02-17 19:12:50
Yes, those are an upper tanent arc (lower bigger; left in this image) and a sunvex Parry arc (upper smaller; right in this image). The upper tangent arc is on a dim 22-degree halo. I think the altitude of the sun is about 5 to 10 degrees, near sunset or sunrise. In this situation, a sunvex Parry arc with a smaller V shape can appear above an upper tangent arc with a bigger V shape. The upper tangent arc and the Parry arc are caused by the same shape of ice crystals (hexagonal prism like a pencil on a desk).
Posted by shiram 2014-02-18 06:24:21
Thank you pablo- I was not sure what the sunvex was at first (now I know!).
Posted by GangnamStyle 2014-02-18 15:29:34
 
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