More than 750 volcano-tectonic and hybrid earthquakes were recorded beneath the Teide–Pico Viejo volcanic complex in Tenerife, Canary Islands between August 6 and 7, 2025. This includes two seismic swarms at depths of 8–14 km (5–9 miles), with the largest event reaching M1.5.
Volcanic alert level at Kusatsu-Shiranesan’s Yugama crater, Japan was raised to Level 2 at 05:50 LT on August 4, 2025, following increased seismic activity and minor ground deformation since June.
New activity/unrest was reported for 9 volcanoes from July 30 to August 5, 2025. During the same period, ongoing activity was reported for 22 volcanoes.
Eruptive activity at Klyuchevskoy volcano intensified after M 8.8 earthquake on July 29, 2025, with a large lava flow descending the WSW flank, continuous lava fountaining, and a significant ash plume. Based on volcanic tremor data and current eruptive behavior, a paroxysmal eruption is considered likely within the next 72 hours.
The Krasheninnikov volcano erupted for the first time in 600 year on August 3, 2025, sending an ash plume 6 km (19 700 feet) into the sky. Scientists suggest that the eruption might have been linked to the M8.8 earthquake that struck the Kamchatka peninsula on July 30.
A major eruption took place at Lewotobi Laki-laki volcano in Indonesia’s East Flores Regency at 17:05 UTC on August 1, 2025, ejecting ash up to 19.2 km (63 000 feet) above sea level. The Aviation Color Code is at Red and the Alert Level at IV (the highest).
New activity/unrest was reported for 4 volcanoes from July 23 to 29, 2025. During the same period, ongoing activity was reported for 19 volcanoes.
Lewotobi Laki-laki volcano in East Flores, Indonesia experienced a sharp rise in seismic activity between 12:00 and 18:00 LT (05:00–11:00 UTC) on July 25, 2025, including 34 volcanic earthquakes of multiple types. The Alert Level remains at IV (highest).
New activity/unrest was reported for 5 volcanoes from July 16 to 22, 2025. During the same period, ongoing activity was reported for 21 volcanoes.
Volcanic haze and elevated levels of sulfur dioxide (SO2) from the Sundhnúk crater range eruption are affecting the western half of Iceland, especially the southwesternmost regions. The Icelandic Meteorological Office forecasts persistent volcanic haze in the south and west through Monday, due to slow and variable winds.
