An Epic Glacier Collapse, Caught on Camera

The immediate aftermath of the rupturing of an ice bridge connected to Argentina's Perito Moreno glacier, causing an enormous splash in the lake below. (Image credit: Christian Grosso)

Amateur photographer Christian Grosso got a surprise recently when he visited a glacier in Argentina's Patagonia region: an enormous ice bridge connected to the glacier ruptured and fell, causing a huge wave in the lake below.

Luckily he had his camera to capture the event. And another visitor caught a video of the ice falling.

"This glacier is somewhat unique in that its path takes it across an arm of a large lake," NASA scientist Jim Foster told OurAmazingPlanet. Foster also curates the Earth Science Picture of the Day, which featured Grosso's photo. "Most glaciers don't have such trajectories, so bridging and tunneling, at least at this scale, is rather rare."

Grosso got to witness the rare event on Saturday, Jan. 19, at about 7:15 p.m. local time; there were only 20 to 30 visitors present at the time, he said. Luckily, Grosso was far enough away that the rush of water didn't affect him, he told OurAmazingPlanet.

This was but a relatively minor rupture of the glacier, however. Every four to five years Brazo Rico's water levels swell as much as 98 feet (30 meters) higher than those in Lake Argentino. When the stress is too much, the glacier catastrophically ruptures, according to the Earth Observatory.

That last happened in March 2012; this latest burst, witnessed by Grosso, resulted from the melting of the ice bridge that was left over from that 2012 collapse, which had hollowed out an enormous hole through the glacier.

Reach Douglas Main at dmain@techmedianetwork.com. Follow him on Twitter @Douglas_Main. Follow OurAmazingPlanet on Twitter @OAPlanet. We're also on Facebook and Google+.

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Douglas Main loves the weird and wonderful world of science, digging into amazing Planet Earth discoveries and wacky animal findings (from marsupials mating themselves to death to zombie worms to tear-drinking butterflies) for Live Science. Follow Doug on Google+.