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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


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."

Geological Summary. Symmetrical Bamus volcano, also referred to locally as the South Son, is located SW of Ulawun volcano, known as the Father. The andesitic stratovolcano is covered in rainforest and contains a breached summit crater filled with a lava dome. There is a cone on the southern flank, and a prominent 1.5-km-wide crater with two small adjacent cones halfway up the SE flank. Young pyroclastic-flow deposits are found on the flanks, and residents describe an eruption that took place during the late 19th century.

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