File:The Brunt Ice Shelf and Berg-1.jpg

English: The Brunt Ice Shelf (BIS) is an area of floating ice bordering the coast of Coats Land in the Weddell Sea sector of Antarctica. Cracks appear often on ice shelves as the ice deforms. In 2012 satellite monitoring revealed the first signs of movement in a chasm (Chasm 1) that had laid dormant for at least 35 years. Since then, this chasm has continued to grow until today. This cloud free image, acquired by one of the Copernicus Sentinel-2 satellites on 7 January 2020, shows that the last remaining connection between the BIS and the Berg-1 (name of the iceberg when it has calved) is less of 5km long and, according to Adrian Luckman, Professor at the University of Swansea, Berg-1 is moving away from the BIS with a velocity of about 2 m per day. When Berg1 will have calved, it will be a dimension about twice the size of New York City. The BIS is probably the most closely and thoroughly observed ice shelf on Earth. Besides a network of 15 GPS instruments which measures the deformation of the ice every day, satellite images from the European Copernicus Sentinel-1 and Sentinel-2 missions are used to map the location of the rift tips and ice velocity.