One of the largest icebergs in the world, known as A23a, is finally on the move after being grounded for over three decades, according to the British Antarctic Survey. This massive iceberg, roughly three times the size of New York City, broke off from West Antarctica's Filchner Ice Shelf in 1986 and has remained stuck in the Weddell Sea. However, recent satellite images show that A23a is now drifting past the northern tip of the Antarctic Peninsula, propelled by strong winds and ocean currents.

Glaciologists are closely monitoring the iceberg's trajectory as it gains momentum. It is expected to be pushed into the Antarctic Circumpolar Current, which will direct it towards the Southern Ocean along a path known as "iceberg alley." This area is known for hosting other large icebergs.

The reason why A23a is suddenly on the move remains unclear. Scientists speculate that the iceberg might have thinned slightly over time, gaining enough buoyancy to lift off the ocean floor and be propelled by the currents. A23a is also among the oldest icebergs in the world.

There is concern that the iceberg could become grounded at South Georgia Island, which could have devastating consequences for the island's wildlife. Millions of seals, penguins, and seabirds breed on the island and rely on the surrounding waters for food. If the iceberg cuts off access to these waters, it could disrupt their foraging patterns.

In 2020, another giant iceberg, A68, raised similar concerns when it appeared to be heading for South Georgia. Fortunately, it broke up into smaller pieces, avoiding a potential disaster. It remains to be seen if A23a will meet a similar fate or continue its journey northward.