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Green flash

From Openwaterpedia
A green flash in the Pacific Ocean seen from the California coast

noun - Green flash is an optical phenomena that is a short (less than a second) burst of visible green light that is visible the moment after sunset or before sunrise. A green spot becomes visible above the sun or it may resemble a green ray shooting up from the sunset on a clear, calm day when the air is warmer than the water. It occurs every sunrise and sunset, but it must be combined with an Inferior mirage to be seen by the naked eye. It occurs because the sun's rays that bend the most as they near the horizon are the blue green rays as the other colors disappear beyond the horizon.