Scientists with the British Antarctic Survey believe a massive iceberg is preparing to calve from the Antarctic Peninsula's Larsen C ice shelf. Recent satellite images revealed a growing fracture.
Researchers estimate the likely break will set free as much as 3,100 square miles of ice, or nearly 2 million acres.
"We use regular satellite images provided by the European Sentinel satellites to monitor cracks in the ice shelf," Andrew Fleming, remote sensing manager at the British Antarctic Survey, said in a news release. "These images are perfect for following these changes since they provide detailed information, day or night and regardless of cloud cover."