Etna (Sicily, Italy): Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Toulouse warned of a volcanic ash plume rising to an estimated 12000 ft (3700 m), or flight level 120, and moving at 15 kts in S direction.
Original VAAC bulletin: ash plume to 12,000 ft (3,700 m) as of Sep 4, 13:00 UTC
Ibu (Halmahera, Indonesia): (3 Sep) The Volcanic Ash Advisory Center (VAAC) Darwin issued the following bulletin.
Original VAAC bulletin: VA REP FM GND AT 03/2137Z EST VA DTG: 03/2150Z
Sinabung (Sumatra, Indonesia): Volcanic ash was observed up to flight level FL140 moving east at 04/0430 UTC, with the ash cloud estimated as of 04/1630 UTC. The latest satellite image did not identify ash due to meteorological cloud; height and forecast are based on satellite and model guidance.
Original VAAC bulletin: Sinabung Volcanic Ash Advisory
Lewotolo (Lesser Sunda Islands): 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, and moving at 10 kts in W direction.
Original VAAC bulletin: ash plume to 6,000 ft (1,800 m) as of Sep 4, 19:40 UTC
Krakatau (Sunda Strait, Indonesia): Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 45000 ft (13700 m), or flight level 450.
Original VAAC bulletin: ash plume to 45,000 ft (13,700 m) as of Sep 4, 16:30 UTC
Semeru (East Java, Indonesia): Volcanic ash was last reported up to FL150 at 04/1053Z, with ash expected to be moving southeast at 10 knots as of 04/1140Z. The latest satellite imagery could not identify ash due to meteorological clouds, but ongoing emissions are expected.
Original VAAC bulletin: Semeru Volcanic Ash Advisory
Dukono (Halmahera): (4 Sep) 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 Sep 4, 01:00 UTC
Fuego (Guatemala): Ongoing volcanic ash emissions are reported at Fuego as of September 4, 2026, 09:25 UTC. Ash was not detected by satellite due to weather clouds, but emissions are considered likely based on recent activity; forecasts indicate no change in model winds at flight level for the next 18 hours.
Original VAAC bulletin: Fuego Volcanic Ash Advisory
Puracé (Colombia): Possible volcanic ash emissions were reported for Puracé. Weather clouds obscured satellite and webcam views, and no recent ash plume height was observed as of September 4, 2026, 13:00 UTC.
Original VAAC bulletin: Puracé Volcanic Ash Advisory
Reventador (Ecuador): Volcanic ash emissions were observed on webcam at Reventador. Satellite images were obscured by weather clouds, and models forecast ash movement to the west-northwest through the next 18 hours.
Original VAAC bulletin: Reventador Volcanic Ash Advisory
Sabancaya (Peru): Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Buenos Aires warned of a volcanic ash plume rising to an estimated 22000 ft (6700 m), or flight level 220, and moving at 10 kts in SE direction.
Original VAAC bulletin: ash plume to 22,000 ft (6,700 m) as of Sep 4, 12:10 UTC