Report on Bagana (Papua New Guinea) — May 1978
Scientific Event Alert Network Bulletin, vol. 3, no. 5 (May 1978)
Managing Editor: David Squires.
Bagana (Papua New Guinea) Sluggish lava flow continuing on N flank
Please cite this report as:
Global Volcanism Program, 1978. Report on Bagana (Papua New Guinea) (Squires, D., ed.). Scientific Event Alert Network Bulletin, 3:5. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN197805-255020
Papua New Guinea
6.137°S, 155.196°E; summit elev. 1855 m
All times are local (unless otherwise noted)
A sluggish lava flow remained active on the N flank of Bagana, but no explosions have been reported there in the past 2 years.
Geological Summary. Bagana volcano, occupying a remote portion of central Bougainville Island, is one of Melanesia's youngest and most active volcanoes. This massive symmetrical cone was largely constructed by an accumulation of viscous andesitic lava flows. The entire edifice could have been constructed in about 300 years at its present rate of lava production. Eruptive activity is frequent and characterized by non-explosive effusion of viscous lava that maintains a small lava dome in the summit crater, although explosive activity occasionally producing pyroclastic flows also occurs. Lava flows form dramatic, freshly preserved tongue-shaped lobes up to 50 m thick with prominent levees that descend the flanks on all sides.
Information Contacts: R. Cooke, RVO.