San Diego Mountain Parks - Kevin Key Photography - San Diego, California
22° moon halo near Mildred Falls

22° moon halo near Mildred Falls

Moon halo with a chemtrail through it.

I shot this near Mildred Falls (the falls are out of frame to the left).

A 22° halo is a halo, one type of optical phenomenon, forming a circle 22° around the sun, or occasionally the moon. It forms as sunlight is refracted in hexagonal ice crystals suspended in the atmosphere. As the light beam passes through two sides of the prism forming a 60° angle, the angle of minimum deviation is almost 22° (namely, 21.84° on average; 21.54° for red and 22.37° for blue). This wavelength-dependent variation in refraction causes the inner edge of the circle to be reddish while the outer edge is bluish. A 22° halo may be visible on as many as 100 days per year.