However, A23a may not hold its size title for long, because as of May 16, it is only around 12 square miles (31 square km) larger than the next-biggest iceberg, D15A, according to the U.S ...

The world’s largest and oldest iceberg, A23a, has come to a halt near South Georgia Island in the South Atlantic Ocean, according to the British Antarctic Survey.

Iceberg A23a is not new. It first broke off from the Filchner Ice Shelf in Antarctica back in 1986, measuring about 3,900 square kilometers —larger than many small countries.

A23a started to drift up through the Southern Ocean in 2020, when currents put it on a possible collision course with South Georgia. The iceberg and the island are about the same size in square miles.

Daniel Lawler Mar 4, 2025 Mar 4, 2025Updated Mar 5, 2025 Comments A23a in the waters off Antarctica (handout released by EYOS Expeditions in January 2024) ...

ANTARCTICA: Iceberg, right ahead! For Sunnyvale’s Carla Klein, a close-up view of icebergs, penguins, seals and whales were among the highlights of a trip to Argentina and Antarctica earlier ...

A23a in the waters off Antarctica (handout released by EYOS Expeditions in January 2024) The movement of the A23a iceberg up to February 28, shortly before it became stuck The iceberg on the left ...