In the sky above US watched a “fire rainbow”

The sky over Puget sound Sound area of the U.S. state of Washington decorated “fire rainbow”.

“Fire rainbow” is officially called rounded-horizontal or kalogeropoulou arc. This is one type of halo. For the emergence of a relatively rare optical phenomena in the atmosphere, certain conditions are necessary: the Sun should be above 58 degrees above the horizon, high in the sky must also be observed light Cirrus clouds, and the flat hexagonal ice crystals should be placed in them horizontally.