Yesterday, a woman in Long Island, NY named Amanda Curtis was lucky enough to capture the rarest rainbow of them all – a quadruple rainbow. According to meteorologists, what Curtis actually saw was a double-double rainbow, but that doesn’t make it any less magical.
The second double rainbow resulted from the sun’s light reflecting off of a nearby body of water; “a large glassy-smooth water surface is required behind the observer. This smooth water surface reflects the sun, such that a second solar light source is generated. This reflected sun […] creates a second primary and secondary rainbow on the opposite side of the sky from the sun.”
Yosemitebear Mountain Double Rainbow