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- Mauna Loa
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The largest active volcano is Mauna Loa, Hawaii, which has the shape of a broad gentle dome 120 km 75 miles long and 50 km 31 miles wide (above sea level), with lava flows which occupy more than 5125 km² 1980 miles² of the island. It has a total volume of 42,500 km³ 10,200 miles³, of which 84.2 per cent is below sea level.
Its caldera or volcano crater, Mokuaweoweo, measures 10.5 km² 4 miles² and is 150–180 m 500–600 ft deep. Mauna Loa rises 4170 m 13,680 ft. Between 1831 and 1950 it averaged one eruption every 3.6 years since 1843, although its last major eruption was in 1984.
Its caldera or volcano crater, Mokuaweoweo, measures 10.5 km² 4 miles² and is 150–180 m 500–600 ft deep. Mauna Loa rises 4170 m 13,680 ft. Between 1831 and 1950 it averaged one eruption every 3.6 years since 1843, although its last major eruption was in 1984.