Fire Rainbow (Circumhorizontal Arc) in Daytime Sky - Natural Atmospheric Phenomenon #2137572 (License: Personal Use)

A brilliant circumhorizontal arc spans the sky, its spectrum of red, orange, yellow, green, blue, and violet hues sharply defined against a pale blue backdrop with scattered white cirrus clouds. Dark green tree silhouettes frame the lower right and left edges, grounding the ethereal phenomenon in a terrestrial setting. The arc appears nearly horizontal, confirming its identity as a circumhorizontal arc rather than a traditional rainbow, requiring the sun to be high (>58°) and ice crystals oriented horizontally in cirrus clouds.

This image is used on meteorology, earth science, or nature photography sites to illustrate rare atmospheric optics; it satisfies user intent for learning about halos, fire rainbows, or capturing striking sky phenomena.