Tutuila Tutuila and Aunu‘u from the Space Shuttle. Elevation: 653 m (2,142 feet) Coordinates: Location: United States Range: Samoa Islands Type: Shield volcano Last eruption: Unknown First ascent: Easiest route: Tutuila is the main or largest island of American Samoa, and the third largest island in the Samoan Island chain (see Samoa). The island is distinctive in the Central Pacific for its large, natural harbor—Pago Pago Harbor—on which the capital o… (More on Tutuila)