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Composite image of Antarctica's Larsen B ice shelf collapse during January, February, and March 2002, as recorded by NASA's MODIS satellite sensor. The first image, from January 31, shows the shelf in late austral summer with dark bluish melt ponds dotting its surface. In the second and third images, from February 17 and 23, minor retreat takes place, amounting to about 800 square kilometers, during which time several of the melt ponds well away from the ice front drain through new cracks within the shelf. The fourth and fifth images, from March 5 and 7, reveal thousands of sliver icebergs and a large light blue area of very finely divided 'bergy bits' where the shelf formerly lay. Brownish streaks within the floating chunks mark areas where rocks and morainal debris are exposed from the former underside and interior of the shelf. The last phases of the retreat totaled approximately 2600 square kilometers.