Map of today's active volcanoesSakurajima (Kyushu, Japan): An explosion was reported at Sakurajima at 16:23 UTC on 4 October 2026, but no volcanic ash cloud was identifiable in satellite data as of 16:20 UTC. No forecast information is available.Original VAAC bulletin: no ash plume observed as of 04 Oct 2026, 16:20 UTCIbu (Halmahera, Indonesia): Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 7000 ft (2100 m), or flight level 070.Original VAAC bulletin: ash plume to 7,000 ft (2,100 m) as of Oct 4, 15:57 UTCLewotolo (Lesser Sunda Islands): (4 Oct) Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 6000 ft (1800 m), or flight level 060.Original VAAC bulletin: ash plume to 6,000 ft (1,800 m) as of Oct 4, 01:00 UTCSemeru (East Java, Indonesia): Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 15000 ft (4600 m), or flight level 150.Original VAAC bulletin: ash plume to 15,000 ft (4,600 m) as of Oct 4, 11:26 UTCDukono (Halmahera): Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 7000 ft (2100 m), or flight level 070.Original VAAC bulletin: ash plume to 7,000 ft (2,100 m) as of Oct 4, 19:00 UTCFuego (Guatemala): The Volcanic Ash Advisory Center (VAAC) Washington issued the following bulletin.Original VAAC bulletin: PSBL VA EMSPuracé (Colombia): Volcanic ash emissions were observed on webcam at Puracé according to the Washington VAAC bulletin issued at 20:01 UTC on October 4, 2026. No specific ash plume height was reported; forecasts indicate possible movement northward and changes in direction over the next 18 hours.Original VAAC bulletin: ash plume observed in webcam as of latest reportSangay (Ecuador): Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Washington warned of a volcanic ash plume rising to an estimated 22000 ft (6700 m), or flight level 220, and moving at 10 kts in NW direction.Original VAAC bulletin: ash plume to 22,000 ft (6,700 m) as of Oct 4, 10:40 UTCReventador (Ecuador): Possible volcanic ash emissions were reported for Reventador, but no ash plume or height was observed as of the latest advisory on October 4, 2026, at 20:27 UTC. Forecasts indicate potential ash movement to the west, but observations may be obscured by meteorological clouds.Original VAAC bulletin: Reventador Volcanic Ash AdvisoryVolcano Activity Summary for 4 Oct 2026: