Near Franklin, WV, the sky was recently lit up by a stunning and rare phenomenon known as a “fire rainbow” or rainbow cloud. Despite their name, fire rainbows are neither fire nor rainbows, but are actually circumhorizontal arcs—bright, colorful bands that appear in the sky when sunlight passes through hexagonal ice crystals in high-altitude cirrus clouds. This mesmerizing display, with its brilliant pastel hues and flame-like appearance, only occurs under very specific conditions, making it a truly extraordinary sight to behold. Credit goes to respective owner Mndiaye
I doubt I have heard of it before and even less likely I have seen them.