Worldwide Volcano News and Updates

INGV reported that during 21-27 November activity at Stromboli was characterized by ongoing explosions at three vents in Area N (North Crater area) and two vents in Area C-S (South-Central Crater area); weather conditions prevented visual confirmation of activity during 21-23 November. Low-intensity explosions from the N1 vent (Area N) ejected course material (bombs and lapilli) less than 80 m high at a rate of 3-7 explosions per hour. Spattering and occasional low-intensity explosive activity was visible at the N2 vent (Area N). Read all

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KVERT reported that the ongoing eruption at Sheveluch during 17-24 November was generally characterized by explosions, hot avalanches, lava-dome extrusion, and strong fumarolic activity. A daily thermal anomaly was identified in satellite images. Collapses generated hot avalanches and ash plumes that drifted 80 km E during 17-18 and 20 November. Read all

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On 23 November AVO lowered the Aviation Color Code for Semisopochnoi to Yellow (the second lowest level on a four-color scale) and the Volcano Alert Level to Advisory (the second lowest level on a four-level scale) noting that no ash emissions or explosive activity had been detected since 7 November. Seismicity had decreased, though remained at elevated levels. Steam emissions from the active vent in the N crater of Mount Cerberus persisted. Read all

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PVMBG reported that the eruption at Semeru continued during 23-29 November. Daily explosions at the summit produced ash plumes that varied in color and density, which generally rose 500-700 m above the summit and drifted in various directions. A dense gray ash plume at 0002 on 23 November rose 700 m and drifted SE and S, at 0507 and 0540 on 24 November white-to-gray and dense gray ash plumes, respectively, rose 500 m and drifted N, at 0702 on 25 November a dense gray ash plume rose 500 m and drifted NE, at 0444 on 26 November an ash plume rose 700 m and drifted S, at 0552 on 27 November a white-to-gray ash plume rose 500 m and drifted S, at 0556 on 28 November a dense gray ash plume rose 500 m and drifted N, that same day at 0611 a dense gray ash plume rose possibly higher than 1 km, and at 0509 on 29 November a white-and-gray ash plume rose 600 m and drifted N. Read all

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IG reported a high level of activity at Sangay during 22-29 November, which included daily explosions, volcanic tremor, and gas-and-steam emissions. The daily count of explosions ranged from 920-1,320, though seismic data transmission was sometimes interrupted. Daily ash-and-gas plumes were identified in either or both IG webcam images and satellite images according to the Washington VAAC. Read all

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OVSICORI-UNA reported continuing eruptive activity at Rincón de la Vieja characterized by occasional small phreatic explosions; five were recorded during 19-25 November. A notable variability in sulfur dioxide emissions was first observed on 18 November and continued through the week, with a peak measurement as high as 1,500 tons per day. A phreatic explosion at 1432 on 25 November produced a steam-rich plume that rose 2 km and drifted SW. Read all

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AVO reported that a minor eruption at a vent on Pavlof's upper E flank was ongoing during 23-29 November and nearly continuous seismic tremor was recorded. Vent incandescence was visible in webcam images on most days, suggesting ongoing lava effusion. Elevated surface temperatures were occasionally identified in satellite images. Read all

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BPPTKG reported that the eruption at Merapi continued during 18-24 November and seismicity remained at high levels. The SW lava dome produced 13 lava avalanches that traveled as far as 1.6 km down the SW flank (upstream in the Kali Bebeng drainage). No significant morphological changes to the central and SW lava domes were evident. Read all

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HVO reported that lava continued to effuse from a vent in the lower W wall of Kilauea's Halema`uma`u Crater during 23-29 November entering the lava lake and flowing onto the crater floor. The active part of the lake remained at a steady level all week. The Volcano Alert Level remained at Watch (the second highest level on a four-level scale) and the Aviation Color Code remained at Orange (the second highest level on a four-color scale). Read all

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PVMBG reported that white steam-and-gas plumes rose as high as 150 m above Kerinci's summit and drifted NE during 25-26 November. Gray plumes of variable densities rose 100-500 m above the summit and drifted NE, E, and NW. At 0830 on 27 November a gray ash plume rose about 400 m above the summit and drifted E. Read all

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