Prior to the large ice island calving off Petermann Glacier, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite captured this natural-color image of Petermann on July 28, 2010. Eight days after this image was taken, an enormous chunk of ice, roughly 97 square miles (251 square kilometers) in size, broke off the Petermann Glacier along the northwestern coast of Greenland.