The latest findings are significant when it comes to our understanding of how glaciers will be impacted by man-made global warming.
Unusual warm winds have led to a spike in late-season surface melt at the ice shelf.
The iceberg, which weights more than 1 trillion tons, broke off from Antarctica's Larsen C Ice Shelf in July 2017.
Rift on the ice shelf is now just eight miles from breaking away into an iceberg a quarter of the size of New Jersey.
When the fissure eventually splits off it will create one of the biggest icebergs ever recorded.