Volcanic ash from Dukono volcano observed at 2 100 m (6 900 feet) a.s.l., Indonesia

Volcanic ash from Dukono volcano in Indonesia was observed at 2 100 m (6 900 feet) above sea level at 04:20 UTC on October 22, 2025. The advisory was issued by Darwin VAAC at 04:50 UTC.

According to the advisory, the ash cloud was present from the surface up to 2 100 m (6 900 feet), extending northeast of the summit. The estimated ash movement was towards the northeast at approximately 9 km/h (5.6 mph). The Darwin VAAC noted that the volcanic ash was not identifiable on satellite imagery due to meteorological cloud cover, with the ash height and movement based on model guidance. The current Aviation Color Code is Orange.

Recent reports from the Smithsonian / USGS Weekly Volcanic Activity Report indicate that Dukono continued eruptive activity during late September 2025. Gas-and-ash plumes rose up to 700 m (2 300 feet) above the summit, drifting east, north-northwest, and west. The Alert Level remained at Level 2, with a public warning to stay at least 4 km (2.5 miles) from the Malupang Warirang Crater.

Dukono is a large, complex volcano located on Halmahera Island in Indonesia. It is characterized by frequent explosive eruptions, producing significant ashfall hazards. Pyroclastic flows and volcanic gas emissions pose additional risks to nearby populated areas and aviation routes. The nearest settlements, such as the towns of Tobelo and Galela, are located within 25 km (16 miles) of the volcano and are subject to potential ashfall during eruptive periods.