What causes the strange green flash at sunset and sunrise on Earth?

There are very special cases, when the sky is very clear and exceptionally transparent, that a green flash can be glimpsed just as the very topmost part of the sun is rising or setting.

What's the science behind the green flash phenomenon seen in a sunset? - Quora

Just For Us All - The Signal From David Katznelson

Joe Rao's Instagram, Twitter & Facebook on IDCrawl

What's a green flash and how can I see one?

Rare green flash at sunset is more than pirate folklore

Just For Us All - The Signal From David Katznelson

Flashing the sun and breeze

Green flash - Wikipedia

Rare green flash at sunset is more than pirate folklore

Science Course with Ryan Morse - What causes vivid colors at sunrise and sunset?

The meaning behind sunsets – The Chant