The summit of the West Mata volcano (shown in red) is nearly a mile below the ocean surface (1,165 meters/3,882 feet), and the base (in blue), descends to nearly two miles (3,000 m/9,842 ft) deep. The eruptive activity occurred at several places along the summit, in an area about the length of a football field. The volcano has a 6-mile-long (9.6 kilometer-long) rift zone running along its spine in a southwest-northeast orientation. 3D image courtesy of NOAA.
