Sakurajima (Kyushu, Japan): (31 Aug) The Volcanic Ash Advisory Center (VAAC) Tokyo issued the following bulletin.
Original VAAC bulletin: ERUPTED AT 20260831/0730Z FL080 EXTD NW OBS VA DTG: 31/0730Z
Ibu (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 Aug 31, 15:50 UTC
Sinabung (Sumatra, Indonesia): Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 17000 ft (5200 m), or flight level 170.
Original VAAC bulletin: ash plume to 17,000 ft (5,200 m) as of Aug 31, 10:30 UTC
Lewotobi (Flores): (31 Aug) 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 Aug 31, 05:22 UTC
Lewotolo (Lesser Sunda Islands): 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, and moving at 15 kts in W direction.
Original VAAC bulletin: ash plume to 7,000 ft (2,100 m) as of Aug 31, 18:37 UTC
…31 Aug:
The activity at the volcano has been very intense over the past weeks, as the group of an ongoing expeditions to Flores observed:
Strombolian to vulcanian type explosions occurred on average every 5-15 minutes, ejecting abundant incandescent material and ash plumes that rose approx. 200 – 800 m above the summit crater. Loud explosion sounds accompanied the eruptions.
…31 Aug:
The elevated eruptive activity at the volcano continues.
The lava flow started to ooze out onto the northeastern slope this time, as the main source of lava is being generated from the cinder cone. Most of the lava occupies the main caldera, from which different branches fall over steep caldera slopes.
Vulcanian-to-strombolian-type explosions produce ash plumes reaching an approx. altitude of 6,000 ft (1,800 m) that propagate to the west of the volcano.
…31 Aug:
The elevated eruptive activity at the volcano continues.
A lava flow started to ooze out onto the northeastern slope. The source of the lava flow remains a vent at the central cinder cone. Most of the summit caldera is being covered by fresh lava flows, from which different branches fall over the steep outer slopes.
Vulcanian-to-strombolian-type explosions produce ash plumes reaching an approx. altitude of 6,000 ft (1,800 m) that propagate to the west of the volcano.
Krakatau (Sunda Strait, Indonesia): (31 Aug) Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 3000 ft (900 m), or flight level 030, and moving at 05 kts in W direction.
Original VAAC bulletin: ash plume to 3,000 ft (900 m) as of Aug 30, 23:33 UTC
Semeru (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 Aug 31, 15:30 UTC
Dukono (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, and moving at 10 kts in NE direction.
Original VAAC bulletin: ash plume to 7,000 ft (2,100 m) as of Aug 31, 16:10 UTC
Aoba (Vanuatu): Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Wellington warned of a volcanic ash plume rising to an estimated 41000 ft (12500 m), or flight level 410, and moving at 05 kts in N direction.
Original VAAC bulletin: ash plume to 41,000 ft (12,500 m) as of Aug 31, 15:59 UTC
Fuego (Guatemala): Ongoing volcanic ash emissions have been observed at Fuego as of August 31, 2026. Forecasts indicate continued ash presence up to FL140 over the next 18 hours.
Original VAAC bulletin: Fuego Volcanic Ash Advisory
Puracé (Colombia): Possible volcanic ash emissions were reported at Puracé, but no ash was currently observed in satellite imagery or webcam as of August 31, 2026, 16:22 UTC. Forecasts indicate potential ash movement westward over the next 18 hours.
Original VAAC bulletin: Puracé Volcanic Ash Advisory
Reventador (Ecuador): Ongoing volcanic ash emissions were reported for Reventador. Ash was not observed in satellite imagery due to partial cloud cover, but recent emissions were seen on webcam. Forecasts indicate little change in ash movement through the next 18 hours.
Original VAAC bulletin: Reventador Volcanic Ash Advisory