At its largest, A-76A measured approximately 3,500 km² (about 1,350 square miles) soon after it broke off from the main A-76 iceberg in May 2021.

Dubbed A-76, the iceberg calved off the Western side of the Ronne Ice Shelf, lying in the Weddell Sea, according to the ESA. A-76 after breaking off of Ronne Ice Shelf in Antarctica.

And, what a sound it is. In 2005, the 76-mile-long and 17-mile-wide iceberg B-15A in Antarctica collided with a shoal, breaking the iceberg into several pieces during the course of five hours.

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.

At its largest, A-76A measured approximately 3,500 km² (about 1,350 square miles) soon after it broke off from the main A-76 iceberg in May 2021.

At its largest, A-76A measured approximately 3,500 km² (about 1,350 square miles) soon after it broke off from the main A-76 iceberg in May 2021.

At its largest, A-76A measured approximately 3,500 km² (about 1,350 square miles) soon after it broke off from the main A-76 iceberg in May 2021.