After spinning in a vortex for months, the world’s largest and oldest iceberg is on the move again.

Researchers from the British Antarctic Survey announced on Friday that the colossal iceberg, designated A23a, is floating across the Southern Ocean. The iceberg’s journey provides a significant opportunity for scientists to study how giant icebergs impact their surrounding ecosystems.

“It’s exciting to see A23a on the move again after periods of being stuck. We are interested to see if it will take the same route the other large icebergs that have calved off Antarctica have taken,” Andrew Meijers, an oceanographer at British Antarctic Survey, noted in the British Antarctic Survey statement, “And more importantly what impact this will have on the local ecosystem.”

A23a weighs almost a trillion tons, and, as of August, spanned 1,418-square-miles (3,672 square kilometers), making it twice as big as Greater London, or just a bit larger than Rhode Island, according to CNN. It has repeatedly claimed the title of the world’s largest iceberg, outlasting several large contenders.

A23a separated from West Antarctica’s Filchner-Ronne […]