Report on Dukono (Indonesia) — 5 October-11 October 2005
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 5 October-11 October 2005
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2005. Report on Dukono (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 5 October-11 October 2005. Smithsonian Institution and US Geological Survey.
1.693°N, 127.894°E; summit elev. 1229 m
All times are local (unless otherwise noted)
Explosive activity continued at Dukono during 26 September to 9 October. Ash rose 100-950 m above the summit (or 4,200-7,000 ft a.s.l.) and mostly drifted ENE. Seismicity was dominated by explosion earthquakes. The Alert Level remained at 2 (on a scale of 1-4).
Geologic Background. Reports from this remote volcano in northernmost Halmahera are rare, but Dukono has been one of Indonesia's most active volcanoes. More-or-less continuous explosive eruptions, sometimes accompanied by lava flows, occurred from 1933 until at least the mid-1990s, when routine observations were curtailed. During a major eruption in 1550, a lava flow filled in the strait between Halmahera and the north-flank cone of Gunung Mamuya. This complex volcano presents a broad, low profile with multiple summit peaks and overlapping craters. Malupang Wariang, 1 km SW of the summit crater complex, contains a 700 x 570 m crater that has also been active during historical time.