Report on Dukono (Indonesia) — 23 March-29 March 2016
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 23 March-29 March 2016
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2016. Report on Dukono (Indonesia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 23 March-29 March 2016. 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 7-22 March white-and-gray plumes rose as high as 1.2 km above the rim of Dukono's Malupang Warirang crater, and were accompanied by roaring heard at the Dukono observation post 11 km away. The weather conditions were generally not windy so ash was deposited around the crater area. Seismicity fluctuated at high levels, but decreased overall compared the end of 2015. 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 23-29 March ash plumes rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted 35-110 km E, SE, S, and SW.
Geological Summary. 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.