Lewotobi volcano in Indonesia erupted on August 17, 2025, emitting volcanic ash up to 9 800 m (32 000 feet) above sea level, according to the Darwin Volcanic Ash Advisory Center (VAAC).
A new lava vent has opened between Bocca Nuova and Southeast Crater on Mount Etna, Italy, at an elevation of about 2 980 m (9 777 feet), producing a steady lava flow and explosive activity at Southeast Crater.
Mount Marapi in West Sumatra, Indonesia, erupted at 08:39 local time (LT) on August 12, 2025, producing an ash plume approximately 1 600 m (5 250 feet) above the summit, or about 4 491 m (14 735 feet) above sea level, drifting toward the northeast.
Indonesia’s Bur ni Telong volcano was placed on alert level II (Waspada) at 06:00 local time (LT) on August 2, 2025, following a rise in deep and shallow volcanic earthquakes between July 30–August 5, 2025. The last eruption at this volcano took place in 1937.
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).
