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.
New activity/unrest was reported for 7 volcanoes from July 9 to 15, 2025. During the same period, ongoing activity was reported for 18 volcanoes.
While the eruption at the Sundhnúksgígar crater row, southeast of Litla-Skógfell, Iceland continues on July 18, 2025, the eruptive activity has declined in the last 24 hours.
The Peruvian Geophysical Institute investigated a mound near Songoña in the Cusco region, dubbed the ‘smallest volcano in the world’ by local media, and confirmed it as a small mud volcano.
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).
