"22 degree halo" in round the SUN

Hope you've noticed a rainbow in a ring around the sun on 3th aug
It's called a "22 degree halo"

According to NASA, the ring appears when high thin clouds cover much of the sky. Those clouds contain milllions of tiny ice crystals, each of which acts like a miniature lens.

Since most of the crystals have a similar shape, light entering one side of a crystal and exiting through the opposite side refracts 22 degrees, which corresponds to the radius of the Sun Halo.

Bay News 9 Chief Meteorologist Mike Clay says it happens three or four times a year. Clay explains that today it's being caused by cirrus clouds blowing off some thunderstorms down by Mexico.