The iceberg A23a has run aground in the shallow waters off of South Georgia, a remote British territory in the Southern Atlantic, researchers say.

After months of floating, the "megaberg" known as A23a has finally come to a halt roughly 50 miles from South Georgia Island

A trillion-ton slab of ice broke off Antarctica’s Filchner Ice Shelf in 1986. Officially catalogued as iceberg A23a, it was stuck at sea for decades. Then it started moving again. Satellite tracking showed it nearing the island of South Georgia in January.