Chasing the 'moonbow' at Victoria Falls

Victoria Falls, known locally as Mosi-oa-Tunya or 'the smoke that thunders,' presents a breathtaking spectacle beyond its daytime grandeur. While a million visitors flock to the falls annually, a select few experience its magic after sunset, particularly during a full moon.

This nocturnal allure centers on the 'moonbow,' a lunar rainbow formed not by sunlight, but by the moon's glow refracting through the water droplets. The phenomenon begins subtly, a faint arc of light appearing in the mist generated by water plunging over 100 meters into the gorge. It requires a bright, low moon, clear skies, and sufficient mist, with observers positioned between the moon and the spray.

Sarah Steger, a visitor, recounted her serendipitous encounter. Initially unaware of the possibility, she was informed by a park attendant about the rising full moon and the rare chance to see a moonbow. This led her to purchase a second ticket for a nighttime visit, deeming the opportunity a fortunate coincidence.

While moonbows form similarly to regular rainbows through light refraction, their rarity stems from the fainter nature of moonlight. Victoria Falls, however, provides an ideal setting due to the sheer volume of mist it produces. This captivating display is fleeting, typically visible for only a few nights each month.