Three Indonesian Volcanoes Erupt Simultaneously on 12 June

Three of Indonesia’s active volcanoes erupted on the morning of Friday 12 June 2026, with simultaneous activity recorded at Dukono in North Halmahera, Ibu in West Halmahera, and Lewotobi Laki-laki in East Flores. Indonesia’s Centre for Volcanology and Geological Hazard Mitigation (PVMBG) confirmed all three eruptions and updated alert levels accordingly.

At Dukono, an ash column reached approximately 400 metres above the crater rim. Ibu produced a similar eruption with ash extending around 500 metres. Lewotobi Laki-laki, the most closely watched of the three given its proximity to populated areas in East Flores, generated an ash plume observed at 400 metres. Alert levels were set at Level II (Waspada) for Dukono and Ibu, and Level III (Siaga) for Lewotobi, with recommended exclusion zones of 2 kilometres around Dukono and Ibu craters, and 4 kilometres around Lewotobi’s active vent.

Residents and visitors in the vicinity of all three volcanoes were advised to wear masks in the event of ashfall, avoid river valleys and drainage channels on the flanks of the mountains, and follow instructions from local authorities. No major infrastructure disruptions were reported from the 12 June activity, and no injuries were confirmed.

Bali is not affected. Bali sits several hundred kilometres southwest of Halmahera and over 500 kilometres from Flores. The island’s airports, roads and tourism operations continue to function normally. Travellers with upcoming trips to Bali or central Java do not need to alter their plans as a result of these eruptions.

For travellers already in or planning to visit East Flores — particularly those heading to Larantuka, Maumere or the surrounding region — it is worth monitoring PVMBG bulletins before departing for areas near Lewotobi. The alert level can change rapidly in response to volcanic behaviour, and local transport links in the area may be disrupted if activity intensifies.

Indonesia’s volcanic activity is a permanent feature of the archipelago, and simultaneous eruptions across multiple sites are not unusual given the country sits on the Pacific Ring of Fire. For context on how to plan around this and other risk factors, our guide to visiting Indonesia for the first time covers the practical considerations most travellers need before arrival.