Latest Volcanic Activity

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that eruptive activity at Dukono continued during 30 April-6 May. Ash plumes in various combinations of white, gray, and black rose 300-1,600 m above the summit and drifted in multiple directions on most days; white plumes rose 300 ...

The Servicio Geol�gico Minero Argentino (SEGEMAR) reported that Observatorio Volc�nico de los Andes del Sur (OVDAS) monitoring stations near Nevado de Longav� recorded a volcano-tectonic (VT) earthquake at 0149 on 20 May associated with rock fracturing inside the volcano. The earthquake was followed...

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that increased seismicity began at Sinabung at 2353 on 21 May when the seismic network recorded continuous tremors with a maximum amplitude of 4 mm. The tremors persisted at least through 22 May and were accompanied by low-frequency...

The Rabaul Volcano Observatory (RVO) reported that the eruption at Titan Ridge, previously identified as the Central Bismarck Sea volcano, decreased during 21-28 May. Hydroacoustic data indicated that the eruption was ongoing, though the number of events had declined. Steam plumes were visible in sa...

The Japan Meteorological Agency (JMA) reported ongoing eruptive activity at Minamidake Crater (Aira Caldera?s Sakurajima volcano) during 18-25 May. Crater incandescence was visible in nighttime webcam images during the first half of the week. An eruptive event at 0519 on 22 May generated an ash plum...

The Kamchatkan Volcanic Eruption Response Team (KVERT) reported that lava effusion at Bezymianny continued on 21 May, accompanied by gas-and-steam emissions and small hot lava avalanches. Pyroclastic flow deposits on the E flank were visible in satellite data. At 0310 on 21 May the Aviation Color Co...

The Alaska Volcano Observatory (AVO) reported that slow lava effusion continued to feed a thick flow in Great Sitkin?s summit crater during 20-27 May. Small earthquakes associated with lava dome growth and rockfalls were detected in seismic data on most days. Weather clouds often prevented webcam an...

The Tonga Geological Services reported that no volcanic activity was detected at Home Reef during 18 April-22 May. Thermal anomalies detected by the Middle Infrared Observations of Volcanic Activity (MIROVA) hot-spot detection system were persistently low. The Aviation Color Code was lowered to Gree...

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Ibu continued during 21-27 May, with daily eruptive events recorded by the seismic network. Daily gray ash plumes rose 200-800 m above the summit and drifted NE, E, and SE. Incandescence at the summit was visible in...

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported continuing eruptive activity at Kanlaon during 20-27 May. The seismic network recorded 6-33 daily volcanic earthquakes, including 1-7 daily periods of volcanic tremor lasting 1-21 minutes each. Sulfur dioxide emissions ranged...

The Hawaiian Volcano Observatory (HVO) reported that the eruption within Kilauea?s Kaluapele summit caldera, characterized by episodic fountaining, incandescence, and intermittent spatter from craters along the SW margin of Halema?uma?u Crater, continued at variable levels during 20-27 May. Nighttim...

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported ongoing eruptive activity at Lewotolok during 21-27 May. White plumes rose as high as 100 m above the summit and drifted in multiple directions on most days. At 1956 on 23 May a white-and-gray ash plume rose 200 m above the summit o...

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that the eruption at Mayon continued during 20-27 May, characterized by lava effusion, pyroclastic density currents (PDCs), incandescent rockfalls, ash-and-gas plumes, and occasional minor Strombolian activity. Emissions were...

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Merapi (on Java) continued during 21-27 May with occasional lava avalanches produced by the active lava dome on the upper SW flank. White plumes rose as high as 650 m above the summit on most days. There were 2-...

The Centro Nacional de Prevenci�n de Desastres (CENAPRED) reported that eruptive activity was low at Popocat�petl during 20-27 May. The seismic network recorded 10-53 long-period events per day, though 148 long-period events were detected during 26-27 May. The signals were accompanied by steam-and-g...

The Servicio Geologico Colombiano (SGC) reported ongoing low-level eruptive activity at Purac� during 19-25 May. Seismic activity associated with rock fracturing processes was mainly located beneath Piocollo and Purac� volcanoes at depths of 1-3 km; the level of seismicity was similar to the previou...

The Instituto Geof�sico-Escuela Polit�cnica Nacional (IG-EPN) reported that eruptive activity at Reventador continued at a high level during 20-27 May. Seismicity included 64-84 daily explosions, long-period earthquakes, harmonic tremor, and tremor associated with emissions. Ash-and-gas plumes, some...

The Instituto Geof�sico del Per�?s (IGP) Centro Vulcanol�gico Nacional (CENVUL) reported continuing eruptive activity at Sabancaya during 18-24 May. The seismic network detected 81 seismic events related to the movement of magmatic fluids and additional earthquakes indicating rock fracturing. No exp...

The Instituto Geof�sico-Escuela Polit�cnica Nacional (IG-EPN) reported that the eruption continued at Sangay during 20-27 May. The seismic network recorded 54 explosions during 20-21 May and 178-356 daily explosions during the rest of the week. Ash-and-gas plumes were visible in webcam views, satell...

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity continued at Semeru during 21-27 May, with daily eruptive events recorded by the seismic network. Daily white-to-gray or gray ash plumes rose 300-1,000 m above the summit and drifted in multiple directions. Incandescen...

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that increased seismicity began at Sinabung at 2353 on 21 May when the seismic network recorded continuous tremors with a maximum amplitude of 4 mm. The tremors persisted at least through 22 May and were accompanied by low-frequency...

The Japan Meteorological Agency (JMA) reported declining unrest at Asamayama. Deformation, notably on the W flank, stagnated in May 2024. Sulfur dioxide emissions began decreasing in June 2025 and by December of that year had reached low levels. The number of shallow volcanic earthquakes had been de...