News and Updates on Volcanoes and Earthquakes

The Japan Meteorological Agency (JMA) reported that eruptive activity at Suwanosejima's Ontake Crater continued during 21-28 July. Incandescence was observed nightly in webcam images. An explosion at 0452 on 21 July generated an ash plume that rose 900 m above the crater rim and drifted W. ... Read all

The Kamchatkan Volcanic Eruption Response Team (KVERT) reported continuing eruptive activity at Sheveluch's “300 years of RAS” dome on the SW flank of Old Sheveluch and at the Young Sheveluch dome during 17-24 July. Thermal anomalies over the domes were identified in satellite images all week. According to the Kamchatka Volcanological Station (Volkstat) minor ash plumes were visible on 22 July; no dome growth was observed. ... Read all

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity continued at Semeru during 23-29 July, often with multiple daily eruptive events recorded by the seismic network. Dense white-and-gray or gray ash plumes rose 500-1,000 m above the summit and drifted in multiple directions; weather clouds occasionally obscured views, particularly during 25 and 28-29 July. Incandescence at the summit was visible in a few webcam images; incandescent material traveling down the flank was visible at 2049 on 26 July in a webcam image. ... Read all

The Instituto Nacional de Sismología, Vulcanología, Meteorología e Hidrología (INSIVUMEH) reported high levels of ongoing eruptive activity at Santa Maria's Santiaguito dome complex during 22-29 July with continuing lava extrusion at Caliente dome. Daily explosions, 1-5 per hour when reported, generated gas-and-ash plumes that rose as high as 1 km above the dome and drifted as far as 20 km W and SW. Effusion of blocky lava and collapses of previous deposits produced block avalanches that descended multiple flanks; the collapsed material sometimes produced pyroclastic flows that reached the base of the volcano. ... Read all

The Observatorio Vulcanológico y Sismológico de Costa Rica-Universidad Nacional (OVSICORI-UNA) reported continuing gas-and-steam emissions with occasional minor amounts of ash at Poás during 23-29 July. Strong incandescence at Boca A vent was observed and the level of the hyperacid lake over Boca C remained at stable levels. Dense gas-and-steam emissions continued to be emitted from both Boca A and Boca C vents. ... Read all