Report on Sheveluch (Russia) — 10 July-16 July 2024
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 10 July-16 July 2024
Managing Editor: Sally Sennert.
Written by JoAnna G. Marlow.
Please cite this report as:
Global Volcanism Program, 2024. Report on Sheveluch (Russia) (Marlow, J G, and Sennert, S, eds.). Weekly Volcanic Activity Report, 10 July-16 July 2024. Smithsonian Institution and US Geological Survey.
Sheveluch
Russia
56.653°N, 161.36°E; summit elev. 3283 m
All times are local (unless otherwise noted)
The Kamchatka Volcanic Eruption Response Team (KVERT) reported that eruptive activity at Sheveluch continued during 4-11 July. Vigorous degassing activity accompanied the effusive eruption in the crater of Young Sheveluch, as well as the growth of the "300 years of RAS" lava dome on the SW flank of Old Sheveluch. Thermal anomalies were observed in both areas on 5-8 and 11 July in satellite images analyzed by KVERT. The Aviation Color Code remained at Orange (the third level on a four-color scale). Dates are reported in UTC; specific events are in local time where noted.
Geological Summary. The high, isolated massif of Sheveluch volcano (also spelled Shiveluch) rises above the lowlands NNE of the Kliuchevskaya volcano group. The 1,300 km3 andesitic volcano is one of Kamchatka's largest and most active volcanic structures, with at least 60 large eruptions during the Holocene. The summit of roughly 65,000-year-old Stary Shiveluch is truncated by a broad 9-km-wide late-Pleistocene caldera breached to the south. Many lava domes occur on its outer flanks. The Molodoy Shiveluch lava dome complex was constructed during the Holocene within the large open caldera; Holocene lava dome extrusion also took place on the flanks of Stary Shiveluch. Widespread tephra layers from these eruptions have provided valuable time markers for dating volcanic events in Kamchatka. Frequent collapses of dome complexes, most recently in 1964, have produced debris avalanches whose deposits cover much of the floor of the breached caldera.