Northern Islands Municipality topographic maps

Alamagan is roughly elliptical in shape, with a length of 4.8 kilometers (3.0 mi), width of 4 km (2.5 mi), and area of 13 km2 (5.0 sq mi). The entire island is the summit of a stratovolcano which rises over 4,000 meters (13,120 ft) from the ocean floor, to an altitude of 744 m (2,441 ft) above sea level at…

Average elevation: 148 m

Average elevation: 35 m

Average elevation: 1 m

Anatahan is roughly elliptical in shape, with a length of 9 kilometers (5.6 mi) and a width of 4 km (2.5 mi) and an area of 33.9 km2 (13.1 sq mi). The island is the summit of a stratovolcano which reaches an altitude of 790 m (2,592 ft) above sea level at its highest peak.

Average elevation: 94 m

Average elevation: 170 m

Average elevation: 178 m

Average elevation: 8 m