- VolcanoBaluan volcano forms the a small 5.5 km wide circular Baluan Island located south of Manus Island. It is the subarial part of the southernmost and largest single volcano in the St Andrew Strait in the Bismarck Sea northwest of New Britain. Baluan is mainly basaltic in composition. The island is densely forested and the volcano contains a large 1 x 0.5 km elliptic vegetated summit crater (Sabroma) and several flank vents. Some of these might be less than 10,000 years old. There are warm springs along the coast which is surrounded by reefs. The only historical activity is an uncertain report of a submarine eruption near the island in 1931.
Volcano type stratovolcano normal or dormant Location Papua New Guinea Summit elevation 254 m / 833 ft Baluan volcano eruptions 1931 (? possible submarine eruption) Typical eruption style explosiveIn contrast to its neighboring islands Lou and Tuluan to the north, Baluan has erupted very few silica-rich rhyolitic magmas, and is mainly basaltic.
Batapona Mountain is a large cinder cone on the north end of the island. Several small islands consisting of cone remnants are found within a kilometer of the north coast.
Source: Smithsonian / GVP volcano information