A fissure eruption began at the Sundhnúksgígar crater row, southeast of Litla-Skógfell, Iceland, around 03:54 UTC on July 16, 2025. The eruptive fissure is approximately 700–1 000 m (2 300–3 280 feet) long and appears to be propagating northward, with lava flowing southeast and no immediate threat to infrastructure.
A sudden explosive eruption at Erta Ale volcano in Ethiopia’s Danakil Depression produced a dense ash plume on the morning of July 15, 2025, interrupting its recent phase of steady lava activity.
A powerful phreatic eruption occurred at the Santa Teresa ausol, part of the Los Ausoles geothermal field in Ahuachapán, El Salvador on July 10, 2025. The eruption ejected a column of boiling water, steam, and sediment, blocking an access road and damaging surrounding infrastructure. No injuries were reported.
New activity/unrest was reported for 3 volcanoes from July 2 to 8, 2025. During the same period, ongoing activity was reported for 18 volcanoes.
A glacial outburst flood has been developing in the Leirá syðri and Skálm rivers, southern Iceland, following rising water levels and electrical conductivity measured since July 7, 2025. Conditions continued to intensify as of 15:00 LT on July 9.
More than 440 earthquakes have been recorded since June 17, 2025, within the Michoacán–Guanajuato Volcanic Field, specifically in the Tancítaro–Parícutin region of Michoacán, Mexico, in an ongoing seismic swarm associated with magmatic activity. The last eruptive period in the field occurred from 1943 to 1952 (VEI 4).
A swarm of hundreds of small earthquakes was detected beneath the summit of Mount Rainier, Washington, starting at 01:29 LT (08:29 UTC) on July 8, 2025, prompting increased monitoring by the USGS Cascades Volcano Observatory and the Pacific Northwest Seismic Network.
A major explosive eruption occurred at Mount Lewotobi Laki-laki, Indonesia, on July 7, 2025, producing an ash column that rose to over 19 km (63 000 feet) above sea level (a.s.l.). The Aviation Color Code was raised to Red, resulting in the cancellation of multiple flights to and from Bali. Heavy ashfall is falling over the nearby villages.
New activity/unrest was reported for two volcanoes from June 25 to July 1, 2025. During the same period, ongoing activity was reported for 20 volcanoes.
A strong explosive eruption occurred at Shinmoedake volcano, part of the Kirishima volcanic complex on Kyushu Island, Japan, at approximately 15:37 JST (06:37 UTC) on July 3, 2025, sending an ash plume up to 6.7 km (22 000 feet) above sea level (a.s.l.). The Japan Meteorological Agency (JMA) had raised the volcanic alert to Level 3 on June 27, following increased volcanic unrest.
