The collision in early February of the 60-mile-long B-9B iceberg with the protruding tongue of the Mertz Glacier in East Antarctica is captured here in a series of satellite radar images.
The crash created a second massive iceberg nearly 50 miles long and 25 miles wide, named C-28. The name means that it’s the 28th glacier since 1976 that has broken off from the quadrant of Antarctica that faces Australia.
The two icebergs have since drifted into a polynya, which is an area of open water that’s surrounded by sea ice but stays unfrozen for much or all of the year. The bergs are obstructing the ocean circulation created by the polynya, and could deprive local marine life of oxygen if they don’t move.
The images were taken by the synthetic-aperture-radar instrument aboard the European Space Agency’s Envisat satellite.