Watch 1st aerial footage of gigantic, breakaway Antarctic iceberg the size of Los Angeles

This aerial photograph taken in late November 2022 shows the  iceberg A81 about to separate from the floating Brunt Ice Shelf. (Image credit: Ian Potten/BAS)

An enormous iceberg in Antarctica — an ice slab that's so massive, it has a surface area greater than Los Angeles — recently got its first aerial cameo, which showed off its mind blowing size.

The ice slab, named A81, was birthed from the Brunt Ice Shelf on Jan. 22 after a gigantic chasm finally snapped through the 490-foot-thick (150 meters) ice shelf, after having been widening for nearly a decade. A81 covered an area of around 600 square miles (1,550 square kilometers) when it broke free from Antarctica and has since traveled around 93 miles (150 km) into the Weddell Sea.

Researchers from the British Antarctic Survey's (BAS) Halley Research Station captured the footage of A81 as they flew over the iceberg on their journey home. The video, released March 13, shows the enormous scale of the hefty berg, which looks like its own ice sheet and is birthing tiny icebergs along its coastline.

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The Halley Research Station was previously based on the ice that now makes up A81 but was moved further inland after the chasm was spotted.

"This was a calving [event] we knew was coming," Oliver Marsh, a BAS glaciologist who recently returned from the Halley Research Station, said in a statement. The BAS team first noticed the chasm in 2012 and has been expecting the immense chunk of ice to break off ever since, he added. 

BAS researchers will continue to track A81 to see where it will end up and what impact it may have on sea levels when it finally melts away. 

Glaciologists are also keeping a close eye on another giant iceberg, A76A, which broke off from Antarctica's Ronne Ice Shelf in May 2021. The mammoth slab of ice is the biggest iceberg on the planet and  the largest remaining piece of A76, which covered an area of around 1,700 square miles (4,300 square km), or larger than the state of Rhode Island, when it calved from the ice sheet. On Oct. 31, 2022, satellite images revealed A76A had finally started to drift away from Antarctica's coastline and into the Drake Passage, which will drag the berg toward the equator where it will eventually melt.

Harry Baker
Senior Staff Writer

Harry is a U.K.-based senior staff writer at Live Science. He studied marine biology at the University of Exeter before training to become a journalist. He covers a wide range of topics including space exploration, planetary science, space weather, climate change, animal behavior, evolution and paleontology. His feature on the upcoming solar maximum was shortlisted in the "top scoop" category at the National Council for the Training of Journalists (NCTJ) Awards for Excellence in 2023.