What's that rainbow ring around the sun? It is a 22 degree halo formed by ice crystals
Blake Sabatinelli , WFTS Staff
1:29 PM, May 14, 2013
4:24 PM, Apr 16, 2014
TAMPA - If you looked up at the sun Wednesday (hopefully with proper protection), you probably saw a rainbow around the sun. It's also known as a 22 degree halo, or sun halo.
According to ABC Action News Meteorologist Denis Phillips, a 22° halo is caused by tiny ice crystals contained in high cirrostratus clouds. The sunlight (or moonlight) REFRACTS through the ice at a 22 degree angle.