| Year |
Volcanic Activity |
| 1974 |
Strombolian eruptions. The first
confirmed eruptions since 1895. |
| 1975 |
Ash emission and lava flows from
Bagiai Cone. |
| 1978 |
Explosions, new incandescent area,
strong vapour emission, increasing seismicity. |
| 1979 |
10-day ash eruption. Two volcanologists
killed by explosion. New crater lake. Small explosions through crater lake. |
| 1980 |
Phreatic explosions followed by shrinking
crater lake. New fumarolic vents. |
| 1981 |
New fumaroles and hot springs. |
| 1989 |
Vegetation returns after 1979 eruption.
Summit deflation continues. |
| 1994 |
Seismic swarm. |
| 1997 |
Fumarolic gas kills vegetation. |
| 2007 |
Increase in thermal activity and gas emission from SE and SW flanks of Bagiai cone. Vegetation killed. |
