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Country: | Indonesia | |
| Subregion Name: | Halmahera (Indonesia) | ||
| Volcano Number: | 0608-03= | ||
| Volcano Type: | Stratovolcano | ||
| Volcano Status: | Historical | ||
| Last Known Eruption: | 2009 | ||
| Summit Elevation: | 1325 m | 4,347 feet | |
| Latitude: | 1.488°N | 1°29'15"N | |
| Longitude: | 127.63°E | 127°38'0"E | |
| The truncated summit of Gunung Ibu stratovolcano along the NW coast of Halmahera Island has large nested summit craters. The inner crater, 1 km wide and 400 m deep, contained several small crater lakes through much of historical time. The outer crater, 1.2 km wide, is breached on the north side, creating a steep-walled valley. A large parasitic cone is located ENE of the summit. A smaller one to the WSW has fed a lava flow down the western flank. A group of maars is located below the northern and western flanks of the volcano. Only a few eruptions have been recorded from Ibu in historical time, the first a small explosive eruption from the summit crater in 1911. An eruption producing a lava dome that eventually covered much of the floor of the inner summit crater began in December 1998. | |||
