News and Updates on Volcanoes and Earthquakes

A new strombolian activity has been observed at the volcano's South-East Crater. ... Read all

The Japan Meteorological Agency (JMA) reported that eruptive activity at Suwanosejima's Ontake Crater continued during 10-17 March. Incandescence was observed nightly in webcam images. Eruptive activity generated emissions that rose 900 m above the crater rim. ... Read all

The Sezione di Catania - Osservatorio Etneo (INGV) reported that eruptive activity continued at Stromboli during 10-16 March. Webcam images showed Strombolian activity at four vents in Area N within the upper part of the Sciara del Fuoco and from at least two vents in Area C-S (South-Central Crater) on the crater terrace. The vents in Area N continued to produce low- to medium-intensity explosions at a rate of 4-9 events per hour, ejecting lapilli and bombs less than 150 m above the vents. ... Read all

The Alaska Volcano Observatory (AVO) reported increasing unrest at Spurr in a special information statement issued on 12 March. Collapses of snow and ice into the summit crater lake that formed during the current period of unrest continued to occur along with steam emissions from fumaroles within and around the summit crater. New diffuse steam plumes from small snow-free spots within Crater Peak, a vent 3.5 km S of the summit, were first observed on 6 March. ... Read all

The Kamchatkan Volcanic Eruption Response Team (KVERT) reported that lava extrusion may have continued at Sheveluch's “300 years of RAS” dome on the SW flank of Old Sheveluch and at the Young Sheveluch dome during 6-13 March. Daily thermal anomalies over the domes were identified in satellite images. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). ... Read all

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity continued at Semeru during 12-18 March, with multiple, daily eruptive events recorded by the seismic network. Daily white-and-gray or gray ash plumes rose 500-1,200 m above the summit and drifted in multiple directions. The Alert Level remained at 2 (the second lowest level on a scale of 1-4). ... Read all

The Instituto Nacional de Sismología, Vulcanología, Meteorología e Hidrología (INSIVUMEH) reported ongoing, high-level eruptive activity at Santa Maria's Santiaguito dome complex during 11-18 March with continuing lava extrusion at Caliente dome. Daily explosions, as many as seven per hour when reported, generated gas-and-ash plumes that rose as high as 1.2 km above the dome and possibly drifted as far as 40 km S, SW, W, and NE. Effusion of blocky lava and collapses of material produced block avalanches that were sometimes heard several kilometers away; these mainly descended the SW and S flanks. ... Read all

The Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that moderate levels of eruptive activity continued at Sangay during 11-18 March. The seismic network recorded 78-475 daily explosions. Weather clouds obscured views most of the week, but during 16-17 March several gas-and-ash plumes were visible rising as high as 1 km above the summit and drifting W, WSW, and SW. ... Read all

The Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA) reported that occasional, small, phreatic eruptions at Rincón de la Vieja were recorded during 12-17 March in monitoring network data. A phreatic eruption at 1828 on 13 March was preceded by more than 25 tornillo-type seismic events. A phreatic event at 0344 on 14 March was the most energetic so far in 2025 and produced a voluminous steam-and-gas plume with tephra that drifted SW. ... Read all

The Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that eruptive activity continued at Reventador during 11-18 March. Seismicity included 59-106 daily explosions, long-period earthquakes, harmonic tremor, and tremor associated with emissions. Multiple daily ash-and-gas plumes rose as high as 1.1 km above the crater rim and drifted in multiple directions. ... Read all