Abstract
This work reports on data on a moderate effusive-explosive eruption of a summit crater of Alaid volcano (Atlasova Island, Northern Kuril Islands) observed from September 10 to December 1, 2022. Based on satellite and visual data, it was determined that the strombolian-vulcanian activity resulted in two lava flows, 2.6- and 1-km long, that outflowed onto the southern slope of the volcano and at least 16 emissions occurred to heights of 2.5 to 6 km a.s.l. The ash plumes spread out mainly in the southeast and east-southeast directions with their maximum length reaching 300–530 km. The eruption posed a danger to local airlines. The lava outflow provoked the formation of lahars that descended along the southern slope of the volcano and reached the island coast. The alluvial fan formed from mudflow masses partially deposited beyond the coastline, causing accretion of the island land.
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ACKNOWLEDGMENTS
The authors are sincerely grateful to Sergey P. Lakomov, a resident of Severo-Kurilsk, for providing photo and video materials and data, whose curiosity and active life position contribute to the monitoring of volcanic activity in the Northern Kurils. We are also grateful to Rafael Vladimirovich Zharkov, our colleague, at the Institute of Marine Geology and Geophysics, Far East Branch, Russian Academy of Sciences for providing data on the state of Alaid volcano in August 2022.
Funding
This work was carried out in accordance with the research plan of the Laboratory of Volcanology and Volcano Hazards of the Institute of Marine Geology and Geophysics, Far East Branch, Russian Academy of Sciences, no. 121030100168.
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Translated by V. Krutikova
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Degterev, A.V., Chibisova, M.V. & Romanyuk, F.A. An Eхplosive–Effusive Eruption of Alaid Volcano in 2022 (Atlasova Island, Northern Kuril Islands). Russ. J. of Pac. Geol. 17 (Suppl 2), S249–S258 (2023). https://doi.org/10.1134/S1819714023080146
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DOI: https://doi.org/10.1134/S1819714023080146