The blue halo appears when the Sun sets on the sea

Optical phenomena are rare in Spanish waters into a videographer's lens.

The blue halo appears on the horizon.

Mikel.gasca account shared on Newsflare video recorded impressive scenes in Donostia, northern Spain on June 14, according to MSN. When the Sun was about to disappear, the cameraman caught the moment when the blue light flashed at the edge of the sea surface.

Green light or flash is an optical phenomenon that occurs in a short time, usually lasting only a few seconds at sunrise or sunset. At that time, a blue halo will appear. This phenomenon can be seen in clear sky conditions, without obstructions.

Green light is quite rare."During my life, I only admired this phenomenon twice," the cameraman said.