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Report on Bamus (Papua New Guinea) — April 1990

Bulletin of the Global Volcanism Network, vol. 15, no. 4 (April 1990)
Managing Editor: Lindsay McClelland.

Bamus (Papua New Guinea) Vigorous February-early March seismicity declines

Please cite this report as:

Global Volcanism Program, 1990. Report on Bamus (Papua New Guinea) (McClelland, L., ed.). Bulletin of the Global Volcanism Network, 15:4. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199004-252110.

Volcano Profile |  Complete Bulletin


Bamus

Papua New Guinea

5.2°S, 151.23°E; summit elev. 2248 m

All times are local (unless otherwise noted)


"Seismic activity . . . decreased markedly in April. Following a period of intense activity in early March, the frequency of occurrence and magnitude of earthquakes decreased gradually, with only 27 events of ML >=3 recorded in April (from a total of 200 events picked up by the Ulawun station, 25 km away). Event frequency ranged between 2 and 7/day. Two isolated earthquakes of ML 5.6 and 4.2 occurred on the 26th."

Geologic Background. Symmetrical 2248-m-high Bamus volcano, also referred to locally as the South Son, is located SW of Ulawun volcano, known as the Father. These two volcanoes are the highest in the 1000-km-long Bismarck volcanic arc. The andesitic stratovolcano is draped by rainforest and contains a breached summit crater filled with a lava dome. A satellitic cone is located on the southern flank, and a prominent 1.5-km-wide crater with two small adjacent cones is situated halfway up the SE flank. Young pyroclastic-flow deposits are found on the volcano's flanks, and villagers describe an eruption that took place during the late 19th century.

Information Contacts: P. de Saint-Ours, and C. McKee, RVO.