Report on Dukono (Indonesia) — 28 May-3 June 2008
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 28 May-3 June 2008
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2008. Report on Dukono (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 28 May-3 June 2008. Smithsonian Institution and US Geological Survey.
1.693°N, 127.894°E; summit elev. 1229 m
All times are local (unless otherwise noted)
CVGHM reported incandescence at Dukono's summit during 31 March-24 April. On 25 April, incandescent material was ejected 25 m above the summit. During 30 April-2 May seismicty increased. On 25 May, an ash plume rose to an altitude of 1.4-2.1 km (4,600-6,900 ft) a.s.l. and was accompanied by thunderous and booming sounds. On 29 May, an ash plume rose to an altitude of 2.3 km (7,500 ft) a.s.l. and again was accompanied by thunderous and booming sounds. The Alert Level was raised to 3 (on a scale of 1-4). Residents and visitors were not permitted within 3 km of the summit.
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.