The summit of the West Mata Volcano is nearly a mile below the ocean surface
(1165 meters / 3882 feet), and the base descends to nearly two miles
(3000 meters / 9842 feet) deep. The eruptive activity occurred at several places
along the summit, in an area approximately the length of a football field. The
volvcano has a six-mile long rift zone running along its spine from SW to NE.