World's largest iceberg — 3 times the size of New York City — "on the move" for the first time in 37 years

The world's biggest iceberg — which is roughly three times the size of New York City — is "on the move" after being stuck to the ocean floor for 37 years, scientists confirmed Friday.

Recent satellite images show the iceberg, called A23a, is now moving past the northern tip of the Antarctic Peninsula and headed toward the Southern Ocean, according to the British Antarctic Survey. 

The iceberg, which spans almost 4,000 square kilometers (or 1,500 square miles) in area, split from the Antarctic coastline in 1986, but then became grounded in the Weddell Sea, the BBC reported.