News and Updates on Volcanoes and Earthquakes

The Icelandic Met Office has updated its hazard assessment to reflect recent developments in the ongoing eruption. ... Read all

In recent days, no ground uplift nor deflation has been observed at Svartsengi. ... Read all

On 29 August the Vanuatu Meteorology and Geohazards Department (VMGD) reported that activity at Yasur continued at a level of “major unrest,” as defined by the Alert Level 2 status (on a scale of 0-5). Recent visual observations, webcam mages, and photos taken in the field indicated that explosions continued, producing emissions of gas, steam, and/or ash. Gas emissions and thermal anomalies were identified in satellite images. ... Read all

JMA reported that eruptive activity at Suwanosejima's Ontake Crater continued during 26 August-2 September. Crater incandescence was observed nightly in webcam images. An explosion at 0056 on 1 September generated an ash plume that rose 1 km above the crater rim and drifted SE. ... Read all

INGV reported that eruptive activity continued at Stromboli during 26 August-1 September. Webcam images showed Strombolian activity at three vents in Area N within the upper part of the Sciara del Fuoco and from one vent at S2 in Area C-S (South-Central Crater) on the crater terrace. The vents in Area N continued to produce explosions at a rate of 8-14 events per hour, ejecting lapilli and bombs 80-150 m above the vents. ... Read all

AVO reported that volcanic unrest at Shishaldin declined over the past several months. Slightly elevated seismicity, small infrasound signals, and weak gas emissions persisted, but there were no signs of explosivity nor the presence of lava in the summit crater. AVO noted that the activity was at background levels, and at 0900 on 30 August the Volcano Alert Level was lowered to Normal (the lowest level on a four-level scale) and the Aviation Color Code was lowered to Green (the lowest color on a four-color scale). ... Read all

PVMBG reported that eruptive activity continued at Semeru during 28 August-3 September with multiple daily eruptive events recorded by the seismic network. White-and-gray or gray ash plumes that were sometimes dense rose 200-1,000 m above the summit and drifted in multiple directions on most days; weather conditions sometimes prevented visual confirmation of the eruptive events, especially on 1 and 3 September. Crater incandescence was sometimes visible in webcam images. ... Read all

In a 3 September satellite image of Nyamuragira part of the end of the lava flow on the WNW flank was visible through weather clouds in a small area about 5.8 km from the center of the caldera. The lava was incandescent, suggesting continued activity. Part of the flow on the NNW flank was visible through the clouds in an area about 3.6 km from the center of the caldera, but it appeared black and was likely cooling. ... Read all

BPPTKG reported that the eruption at Merapi (on Java) continued during 23-29 August. Earthquakes were less intense compared to the previous week. The SW lava dome produced lava avalanches that descended the S and SW flanks; 327 traveled as far as 2 km SW down the upper part of the Sat/Putih drainage and two traveled as far as 1.3 km S down the Boyong drainage. ... Read all

PVMBG reported that eruptive activity at Marapi (on Sumatra) was ongoing during 28 August-3 September. On 30 August and 3 September white emissions rose 200-300 m above the summit and drifted N, E, and SE. At 0823 on 31 August a dense white-and-gray ash plume rose 400 m above the summit and drifted N. ... Read all