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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 area is about 3,500 square kilometres (1,400 sq mi), which makes it the current largest iceberg in the world. [2] [3] [4]
Known as A23a, the 1,400-square-mile iceberg had been stuck on the ocean floor near Antarctica for 37 years after splitting in 1986 from the Antarctic’s Filchner Ice Shelf.
T he largest iceberg in the world is headed toward an island with a massive population of penguins and seals. ... Scientists catalogued it under the name A23a. It was stuck at sea for decades but ...
The iceberg, known as A23a, ... This images provided by Maxar Technologies shows the A23a iceberg moving through the sea sea near the Antarctica, on Wednesday 15 Nov 2023.
In 1986, satellite images revealed ice breakup near Druzhnaya I. It drifted to sea in 1986 when the ice it was on broke from the main ice shelf as iceberg A23a. [5] It was later discovered at sea by the ship Kapitan Kondratyev. Its equipment and prefabricated structures were airlifted to Druzhnaya III shortly after its construction. [6]
November 27: The British Antarctic Survey confirms that the world's largest iceberg, A23a, is now leaving the Weddell Sea and drifting into the Southern Ocean after being in the Weddell Sea for more than 30 years. The iceberg is expected to follow the Antarctic Circumpolar Current and continue to drift away from Antarctica. [3]
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.
The world’s largest iceberg is on the move again, drifting through the Southern Ocean after months stuck spinning on the same spot, scientists from the British Antarctic Survey (BAS) have said.