Iridescent clouds appears over Santiago de Chile at sunset

Iridescent clouds appears over Santiago de Chile at sunset

This eerie iridescent cloud appeared over Santiago de Chile at sunset on July 15, 2016.

This is one of the most unbelievable rainbow cloud I have ever seen in my life!

Roberto Antezana
Roberto Antezana

Cloud iridescence is a fairly uncommon phenomenon when colors appear in a cloud, most often altocumulus, cirrocumulus, lenticular clouds and cirrus clouds.

Roberto Antezana

Iridescent clouds are a diffraction phenomenon caused by small water droplets or small ice crystals individually scattering light.

The colors are usually pastel, but, as in these pictures, they can be very vivid. Newly forming clouds produce the brightest and most colorful iridescence.

Roberto Antezana

Iridescence is generally produced near where the sun appears in the sky, with the sun’s glare masking it, so it is more easily seen by hiding the sun behind a tree or building. In our case, it was hidden by the Andes. Other aids are dark glasses, or observing the sky reflected in a convex mirror or in a pool of water. Or one can simply block the sun (but not the cloud) with the palm of one’s hand.

A few days before, this blood red sunset sky engulfed the smoggy sky of Santiago de Chile.

Roberto Antezana
Roberto Antezana

Images: Roberto Antezana

Source: Strange Sounds

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