The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Dukono was high during 2025. The monitoring network recorded a range of 60-394 daily eruptive events (227 events/day average), with ash-and-gas plumes rising 200-2,500 m above the summit. Rumbling and booming sounds were reported during 12-13 March. Daily gas-and-ash plumes during 12-18 March generally rose up to 2.5 km above the summit and drifted NW, W, and SW. Plumes on 16 March rose higher; at 1346 and at 1442 dense gray ash plumes rose 3-3.1 km above the crater rim that drifted W and NW. The Alert Level remained at Level 2 (on a scale of 1-4) and the public was warned to stay 4 km away from the Malupang Warirang Crater.

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.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)