A major eruption started at Lewotobi Laki-laki volcano in Indonesia’s East Nusa Tenggara province at 09:45 UTC (17:45 local time) on June 17, 2025, ejecting an ash column up to 16 km (52 500 feet) above sea level and prompting authorities to raise the alert level to the highest.
Kanlaon volcano in the central Philippines emitted 2 679 tons of sulfur dioxide on June 16, 2025, with five volcanic earthquakes recorded in the same 24-hour period. The volcano remains at Alert Level 3 as signs of elevated unrest persist.
Increased seismic activity was detected at Iliamna Volcano, Alaska, starting around 12:30 UTC (04:30 local time) on June 15, 2025, with earthquakes occurring up to several times per minute before declining to about one per minute.
Increased volcanic activity at Fuego in Guatemala forced the evacuation of an estimated 700 people from several villages in Chimaltenango on June 5, 2025. Heavy rains worsened conditions by triggering lahars that blocked roads and hampered emergency efforts. Authorities have closed schools, shut down roads, and issued an orange alert.
Powerful eruptions at Guatemala’s Fuego Volcano sent massive pyroclastic flows and a huge boulder down its slopes, forcing evacuations of nearby villages on June 5, 2025. The flows traveled as far as 7 km (4.3 miles), carrying thick ash clouds and volcanic debris. Officials have warned of the deadly risks from heat and toxic gases from the eruption.
Fuego volcano in southern Guatemala began erupting on June 4, 2025, following weeks of increased activity. Explosions produced ash plumes reaching up to 4 800 m (15 750 feet) above sea level, and lava flows have impacted several nearby areas. Incandescent emissions, avalanches, and continued ashfall were reported, prompting heightened alerts and close monitoring. The activity continued into June 5, producing large pyroclastic flows and triggering the evacuation of nearby villages.
Footage captured on June 2, 2025, shows people fleeing as an eruption at Mount Etna’s Southeast Crater produces pyroclastic flow and an ash plume up to 6.5 km (21 325 feet).
A sharp increase in volcanic tremor preceded a new Strombolian eruption at Mount Etna, Italy, early on June 2, 2025, with ash and SO2 clouds drifting southwest. The Aviation Color Code was raised to Red at 03:32 UTC and downgraded to Orange at 06:39 UTC.
Low-level seismic tremor detected at Grímsfjall in recent days indicates possible internal water movement within the Grímsvötn subglacial lake system, southeast Iceland. The last eruption of this volcano took place in 2011 (VEI 4).
New activity/unrest was reported for two volcanoes from May 21 to 27, 2025. During the same period, ongoing activity was reported for 13 volcanoes.
