Etna (Sicily, Italy): (30 Aug) A spectacular video of the oozing lava flow emanating from the eruptive fissure was captured by the INGV volcanologist Boris Behncke.
How does lava sound when it comes to the surface of the Earth? Listen to a lava flow oozing out of its effusive vent high on the southwestern side of #Etna, 28 August 2025. That day no visits by tourists were allowed on the site, which permitted this (relatively) clean recording pic.twitter.com/iNT5ONQryy
— Boris Behncke (@etnaboris) August 30, 2025
Suwanose-jima (Ryukyu Islands): (31 Aug) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTED AT 20250831/0739Z FL100 EXTD NW OBS VA DTG:31/0740Z
Ibu (Halmahera, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 6000 ft (1800 m) altitude or flight level 060 .
The full report is as follows: VA TO FL060 MOV NE LAST REPORTED AT 31/1530Z to 6000 ft (1800 m)
Semeru (East Java, Indonesia): (31 Aug) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: VA TO FL150 OBS AT 30/2340Z MOV SW EST VA DTG:31/0540Z to 15000 ft (4600 m)
Marapi (Western Sumatra, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 12000 ft (3700 m) altitude or flight level 120 .
The full report is as follows: VA OBS TO FL120 MOV SE AT 31/1300Z OBS VA DTG:31/1300Z to 12000 ft (3700 m)
Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 .
The full report is as follows: VA EMS OBS to 14000 ft (4300 m)
Nevado del Ruiz (Colombia): (31 Aug) Volcanic Ash Advisory Center Washington (VAAC) issued the following report: PSBL VA EMS
Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 .
The full report is as follows: VA CLD OBS to 20000 ft (6100 m)
Reventador (Ecuador): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: PSBL VA EMS