A23a is a large tabular iceberg which calved from the Filchner–Ronne Ice Shelf in 1986. It was stuck on the sea bed for many years but then started moving in 2020. As of January 2025, its …

Dec 1, 2023 · The world's largest iceberg, A23a, is moving into the open waters near Antarctica after being essentially stuck in place for decades. It's seen here in satellite imagery from Nov. 15.

2 days ago · The route of A23a toward South Georgia Island. (Image credit: Omar Zaghloul/Anadolu via Getty Images) Measuring roughly 1,350 square miles (3,500 square …

Nov 24, 2023 · A23a is a true colossus, and it's not just its width that impresses. This slab of ice is some 400m (1,312 ft) thick. For comparison, the London Shard, the tallest skyscraper in …

Dec 18, 2024 · A23a, which is often dubbed a "megaberg," has a surface area roughly three times larger than New York City and weighs just under 1 trillion tons.

Dec 16, 2024 · A23a has held the “largest current iceberg” title several times since the 1980s, occasionally being surpassed by larger but shorter-lived icebergs, including A68 in 2017 and …

Dec 20, 2024 · About the size of Rhode Island, the iceberg known as A23a got stuck in an ocean vortex this summer, spinning in place for months. Now, it's free, and heading back into open …

Aug 15, 2024 · The colossal iceberg known as A23a has been slowly spinning in one spot of the Southern Ocean since April. Here’s what experts have to say on the phenomenon.

Jan 23, 2025 · The iceberg, called A23a, was previously “trapped” spinning around an undersea mountain for several months, according to Andrew Meijers, a physical oceanographer at the …

Aug 3, 2024 · Something remarkable has happened to A23a, the world's biggest iceberg. For months now it has been spinning on the spot just north of Antarctica when really it should be …