Oro Province, Papua New Guinea
9.552 S, 149.079 E
summit elevation 640 m
Waiowa Volcano is located on the mainland of New Guinea, 19 km inland from Collingwood Bay in Oro Province. A number of old volcanic cones lie between the crater and the coast. The volcano consists of a small vent on a fault-line near the margin of the Owen Stanley metamorphic belt.
The first recorded eruptions of Waiowa volcano were between December 1943 and August 1944. The eruptions were preceded by 4 months of seismic activity. Explosive eruptions occurred with pyroclastic flows and lahars. The eruptions occurred in an area previously considered inactive. The 1943 eruption broke through highly metamorphosed rocks, indicating a long period of inactivity.