Report on Dukono (Indonesia) — 4 November-10 November 2015
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 4 November-10 November 2015
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2015. Report on Dukono (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 4 November-10 November 2015. Smithsonian Institution and US Geological Survey.
1.693°N, 127.894°E; summit elev. 1229 m
All times are local (unless otherwise noted)
PVMBG reported that during 1 August-3 November white-and-gray plumes rose as high as 1 km above the rim of Dukono's Malupang Warirang crater and were accompanied by rumbling and roaring. Ashfall was reported in areas from the Galela District to Tobelo town (NNW) in August and at the Dukono observation post in September. Seismicity fluctuated at high levels, with elevated periods during 15-22 August, 28 August-5 September, and 15-25 October. The Alert Level remained at 2 (on a scale of 1-4). Residents and tourists were advised not to approach the crater within a radius of 2 km.
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 4-10 November ash plumes rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 25-130 km N, NW, W, SW, and S.
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.