Beautiful hat-shaped cloud iridescence appears in sky in Thailand

This is the spectacular moment a hat-shaped cloud iridescence appeared in the sky in southern Thailand on June 20.

This is the spectacular moment a hat-shaped cloud iridescence appeared in the sky in southern Thailand on June 20.

A rainbow cloud, also known as a Circumhorizontal arc, forms because of something called cloud iridescence.

This is also known as "irisation."