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 …

As iceberg A23a begins its migration northward, it first encounters the powerful influence of ocean surface currents. Upon breaking free from the Filchner Ice Shelf, A23a initially becomes …

Jan 23, 2025 · The world’s largest iceberg is still on the move and there are fears that it could be headed north from Antarctica towards the island of South Georgia.

Aug 10, 2024 · The world's largest iceberg, A23a, is stuck again. For more than 30 years, the giant frozen block — equivalent to the size of Rhode Island — was grounded on the sea floor …

Dec 1, 2023 · Recent satellite images have shown the migration of the mammoth iceberg known as A23a from its origins in the Weddell Sea to its current position on the edge of the open …

Dec 14, 2024 · The world's biggest iceberg is on the move again after being trapped in a vortex for most of the year. A23a is 3,800 sq km (1,500 sq miles), which is more than twice the size …

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 …

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 …

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 …

On Jan. 22, 2025, NOAA’s GOES East satellite captured imagery of the world’s largest current iceberg, A23a, slowly drifting northeastward in the Southern Ocean.