No volcanic ash identified at Bagana volcano, Papua New Guinea

Volcanic ash from Bagana in Papua New Guinea was not identified at any altitude as of 04:20 UTC on October 29, 2025. The advisory was issued by the Darwin VAAC at 04:41 UTC on October 29, 2025.

According to the advisory, volcanic ash was not detected in recent satellite imagery (Himawari-8) under clear conditions. Previous observations had reported ash up to flight level 100—approximately 3 050 m (10 000 feet)—moving northwest, but as of the most recent satellite data, no ash cloud was observed and no further advisories are planned. The current Aviation Color Code is Orange.

Bagana volcano does not appear in the most recent Smithsonian / USGS Weekly Volcanic Activity Report covering late September 2025, and no new updates regarding its activity are included in the latest Global Volcanism Program summaries.

Bagana is a large andesitic lava cone located in central Bougainville Island, Papua New Guinea. It is one of the most active volcanoes in Papua New Guinea, frequently producing lava flows and occasional ash emissions. The nearest large population center is Arawa, approximately 30 km (19 miles) to the southeast, which could be affected by ashfall or pyroclastic flows during significant eruptions. Ash emissions and lava flows are the primary hazards, along with possible impacts to air traffic in the region.