Moon Corona - Norway A typical corona is only couple degrees in diameter and closely fringes the moon. Although not as intense as a solar rainbow, coronas may appear in several colors. On rare occasions lunar halos and lunar coronas can appear together
Fire rainbows are the rarest of all naturally occurring atmospheric phenomena. For a fire rainbow to occur, cirrus clouds must be feet in the air with the precise amount of ice crystals, and the sun must hit the clouds at 58 degrees. (a/k/a Sun Doggies)
Cloud Art or Nature's Cloud Symphonies: this multi-coloured cloud phenomenon is called Sundog: rainbow cloud when ice crystals appear in clouds & refract sun's rays. Photographer Robert Arn, here in Heyworth, Illinois, US
A rare & wonderful atmospheric phenomenon-"fire rainbow" - this optical effect in the atmosphere, manifested in the appearance of a horizontal rainbow, localized on a background of light, high cirrus clouds!