Geologic Background:
The symmetrical Bamus volcano, also referred to
locally as South Son, is located SW of Ulawun volcano,
known as the North Son. These two volcanoes are the
highest in the 1,000-km-long Bismarck volcanic arc. Bamus
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.
Historic Activity:
- Last eruption is thought to have occurred in about
1890.
Recent Activity:
- Solfataric activity.
- Strong seismicity began in February 1990 and
continued thru early March and then began to decline.
Returned to near background levels by May 1990.
Data Sources:
- Global Volcanism Network (V. 15, No. 2 to V. 15, No.
5)
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