Scientists first discovered significant cracks in the ice shelf a decade ago, but in the last two years there have been two major breaks.
The BAS Halley Research Station is located on the Brunt Ice Shelf and glaciologists say the research station is safe.
"This calving event has been expected and is part of the natural behavior of the Brunt Ice Shelf. It is not linked to climate change. Our science and operational teams continue to monitor the ice shelf in real-time to ensure it is safe, and to maintain the delivery of the science we undertake at Halley," Professor Dominic Hodgson a BAS glaciologist said in a news release.
Recent data shows the sea ice has not since recovered, suggesting the continent could end the summer with a new record on the books for the second year in a row.
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