A few weeks ago, over a 24-hour period, a huge chunk of the Jakobshavn glacier in Greenland broke up. The piece was so big it moved the glacier one mile inland in a single day.
“Seven-square miles of a Greenland glacier broke up on July 6 and 7, moving the edge of the glacier a mile inland in one day, the furthest inland it has ever been observed. While such calving of glaciers isn't rare, seeing it happen at high resolution by satellite in almost real time is.”
“NASA-funded researchers have been monitoring Greenland's Jakobshavn Isbrae using satellite images from the Landsat, Terra, Aqua and DigitalGlobe's WorldView 2 satellites. The breakup was detected hours after it happened by Ian Howat of the Byrd Polar Research Center at Ohio State University and Paul Morin, director of the Antarctic Geospatial Information Center at the University of Minnesota.”