volcanic island in the South Atlantic Ocean near the Equator; it is part of Equatorial Guinea. Located about 350 miles (565 km) southwest of continental Equatorial Guinea, it occupies an area of 7 square miles (17 square km) and rises to an elevation of 2,200 feet (671 metres). Fishing and lumbering activities are centred in San Antonio, the chief settlement. Pop. (2001) 5,004.