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.
November 12, 2015. Dukono, Halmahera, Indonésia:
Elevation 1335 m
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, aussi connu comme CVGHM), Centre d’avis de cendres volcaniques Darwin (VAAC), GVP.
Photo: Andi / Volcano-News Indonesia, Aris Yanto .