The above image is called a pireus iredescent cloud. The photo was taken in Ethiopia. Like a rainbow this phenomena is caused by water droplets and the diffraction of sunlight when it hits the droplets. The uniform and similar size of the water droplets also adds to this occurence. I wonder why I have never seen any of these clouds before in Florida? There must be other atmospheric properties in certain regions that allow this to happem, because I have viewed hundreds of clouds, rain or not and have never seen this before.
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