The green flash Null photographed last week from the bluffs of Redondo Beach, about 50 feet above the ocean in Half Moon Bay, and shared on social media was a mock mirage, as he noted on Twitter.

The green flash is a rare, brief optical event of green, yellow, and sometimes blue that colors the horizon, occurring at sunrise or sunset most often in the western U.S.

My interest in the “green flash” began at a young age. I can’t remember precisely when or where I’d read about it, but I do recall being fascinated by the thought of an effect that was supposed to ...

According to NASA, the green flash is a real phenomenon when the Sun sets or rises, and its light is refracted by the Earth's atmosphere. San Francisco Chronicle via Getty Images KEY WEST, Fla ...

As the sun dips below the horizon and the light starts to dim, lucky observers may spot a rare, brief flash of emerald. This is the "green flash," which can sometimes be seen right after sunset or ...

GREENVILLE, N.C. (WNCT) – The next time you head to the beach to catch a sunrise or sunset, try also spotting the elusive green flash.What is it? It’s an optical phenomenon that happens when ...

Mention the green flash in mixed company, and raised eyebrows accompanied by comments that you may have gone off the deep end might occur. Many people have never heard of it, some say it is an ...