Map of today's active volcanoesEtna (Sicily, Italy): Time-lapse videos from webcams allow to at least partially reconstruct the series of events at Etna yesterday: first, hot material rapidly accumulated on the eastern rim of the summit vent seemed to start sliding; the release of weight then seems to allow an explosion to take place, destabilizing a larger portion of the upper flank, thus generating a very large slide.Due to the steep slope, acceleration is large: within seconds, the moving rock masses, disintegrating and mixing with air become a turbulent, hot, fluidized mixture (pyroclastic flow) that reaches the base of the cone quickly before descending further into Valle del Leone and Valle del Bove. ... [read more] ... [show less] Italie - EtnaDes images de la coulée pyroclastique de l'Etna en timelapse.Hallucinant.Je ne vous cache pas que je reste surpris. C'est explicable bien sûr, on y viendra mais là, ça me surprend. pic.twitter.com/RPIVE0GdJb— GeoTales (@GeoTales_) June 2, 2025 ...3 Jun:Following the spectacular pyroclastic flow from the SE Crater yesterday, a recent Sentinel-2 satellite acquisition of the eruptive activity has been detected. The satellite imagery depicts a new lava flow emitting onto the eastern flank of the edifice.Ibu (Halmahera, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 8000 ft (2400 m) altitude or flight level 080, and is moving at 25 kts in NE direction.The full report is as follows: VA TO FL080, LAST REPORTED AT 03/0419Z EST VA DTG:03/1020Z to 8000 ft (2400 m)Semeru (East Java, Indonesia): 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 and is moving at 10 kts in W direction.The full report is as follows: VA TO FL150 LAST REPORTED AT 03/1733Z OBS VA DTG:03/2000Z to 15000 ft (4600 m)Fuego (Guatemala): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: OCNL VA EMSangay (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 and is moving at 30 kts in W direction.The full report is as follows: to 20000 ft (6100 m)Reventador (Ecuador): 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 EM DTCTD to 14000 ft (4300 m)Screenshot of the time-lapse video showing the pyroclastic flow at Etna yesterday