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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.
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]
In May 2021, Iceberg A-76 broke off the northwest corner of the shelf. At 4320 km 2, [4] it is larger than Majorca, several times larger than Iceberg A-74 which calved in the same year, or approximately 14% the size of Belgium. The ice of the Filchner–Ronne ice shelf can be as thick as 600 m; the water below is about 1400 m deep at the ...
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 A76 in 2021.
Scientists use a radar satellite to take a "tape measure" to the world's biggest block of ice.
It may be bigger than a large city - but the world's biggest iceberg can still turn on a sixpence. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: ...
The split of the A38-B iceberg is recorded in this series of images. The iceberg was originally part of the massive A-38 iceberg, which broke from the Ronne Ice Shelf in Antarctica [3] B-15A: 6,400 2002 Northern edge of Iceberg B-15A in the Ross Sea, Antarctica, 29 January 2002: A-68: 5,800 175 50 2017 Calving crack in the Larsen C ice shelf [2 ...
The world's biggest iceberg, A23a, is experiencing rapid decay as it moves through the Southern Ocean. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: ...