PVMBG reported that the eruption at Dukono was ongoing during 3-9 April. Gray-and-white ash plumes rose as high as 1 km above the summit and drifted SW, S, and SE during 3 and 7-9 April. According to the Darwin VAAC an ash plume rose to 2.4 km (8,000 ft) a.s.l., or about 1.6 km above the summit, and drifted SW on 4 April. Plumes were either absent or not observed due to weather conditions on the other days. The Alert Level remained at Level 2 (on a scale of 1-4), and the public was warned to remain outside of the 3-km exclusion zone.

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, have occurred since 1933. During a major eruption in 1550 CE, a lava flow filled in the strait between Halmahera and the N-flank Gunung Mamuya cone. 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.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)