Pago is a shield volcano in the center of Tutuila Island , the largest island of American Samoa in the South Pacific Ocean .
3-487: The volcano was formed by subaerial eruptions between 1.54 and 1.28 million years ago. It has been estimated that the volcano was as high as 3,937 feet (1,200 m) above sea level. Activity on Pago Volcano ended with emplacement of trachyte bodies with ages of 1.03 ± 0.01 Ma. The Pago Volcano caldera was formed 1.27+-0.02 million years ago. The caldera's dimensions are estimated at 5.9 miles (9.5 km) in length and 3 miles (4.8 km) in width. The southeast part of
6-543: A subaerial eruption is any sort of volcanic eruption that occurs on the Earth's surface, or in the open air "under the air" , and not underwater or underground. They generally produce pyroclastic flows , lava fountains and lava flows, which are commonly classified in different subaerial eruption types, including Plinian , Peléan and Hawaiian eruptions . Subaerial eruptions contrast with subaqueous , submarine and subglacial eruptions which all originate below forms of
9-534: The caldera makes up Pago Pago Harbor , one of the world's largest natural harbors. The northwest rim, Maugaloa Ridge, creates the southern border of the National Park of American Samoa . 14°15′55.36″S 170°41′17.14″W / 14.2653778°S 170.6880944°W / -14.2653778; -170.6880944 This American Samoa location article is a stub . You can help Misplaced Pages by expanding it . Subaerial eruption In volcanology ,
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