"Waiowa (also known as Goropu) is an isolated pyroclastic cone that was formed during 1943-44 by explosive eruptions through Paleozoic to pre-Cambrian metamorphic rocks. The trachyandesitic volcano was born in an area of the eastern Papuan Peninsula without previous volcanic activity. Intermittent minor explosions beginning September 18, 1943 preceded the first major explosion on December 27. Additional large explosions occurred on February 13 and July 23, 1944, leveling 80 sq km of forest. Following the final eruption on August 31, the topographically insignificant volcano was capped by a 500-m-wide, steep-walled crater that is now densely forested and contains a small lake."  -Smithsonian Volcano Archive
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