Bagana volcano, on Papua New Guinea's Bougainville Island, is characterized by the extrusion of thick, viscous andesitic lava flows. This photo shows a large lava flow with prominent lateral levees descending from the summit and ponding against forested hills at the base of the volcano. Bagana is constructed almost entirely of overlapping lava-flow lobes. Slow lava extrusion, occasionally accompanied by explosive activity, has been common since the mid-1800s.

Photo by Wally Johnson, 1988 (Australia Bureau of Mineral Resources).

This image is made available under the Creative Commons BY-NC-ND 4.0 license terms.

Galleries: Lava Flows

Keywords: lava flow | eruption | effusive | levee | lava lobe

Bagana