Shiveluch volcano (Kamchatka): massive pyroclastic flow came during intensively growing phase of lava dome
Thu, 1 Dec 2022, 06:32
06:32 AM | BY: MARTIN
Spewing ash column from the pyroclastic flow rising to 4 km altitude on 29 Nov (image: KVERT)
Strongly illuminated lava dome at Shiveluch volcano due to glowing rock falls (image: Yuri Demyanchuk)
A massive block-and-ash flow took place from the volcano's active lava dome on 29 November. The KVERT surveillance cameras observed a dense grey billowing ash plume (so-called phoenix cloud) separating from the pyroclastic density current. The VAAC Tokyo reported the ash column up to 13,000 ft (4,000 m) height. The reason for this flow was the gradual accumulation of unstable lava dome material and its destabilization, resulting in a partial collapse.
It came during the intense phase of the volcano over the past few weeks as the active lava dome continues to grow and produce frequent incandescent rock falls to the southeast and southeast.
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Wed, 30 Nov 2022, 15:00
Sheveluch volcano (Central Kamchatka, Russia) - Smithsonian / USGS Weekly Volcanic Activity Report for 23 November-29 November 2022 (Continuing Activity)
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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