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Billy Mitchell
"Billy Mitchell, a small pyroclastic shield immediately NE of Bagana volcano, has produced some of the largest Holocene eruptions of Papua New Guinea. Andesitic-to-dacitic Billy Mitchell volcano is truncated by a 2-km-wide caldera containing a shallow lake with a small island near its southern shore. Two major explosive eruptions, one about 900 years ago and the other about 370 years ago, produced dacitic pyroclastic-fall deposits that cover most of the northern half of Bougainville Island. The younger eruption may have been responsible for formation of the nearly vertical, steep-walled summit caldera. Pyroclastic-flow and -surge deposits from Billy Mitchell extend 25 km to the eastern coast of Bougainville Island."  -Smithsonian Volcano Archive
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