The Dynamics of the Morphology and Deposit Temperature Changes and the Volume of Erupted Material of the Corresponding Member of the RAS G.S. Gorshkov Vent (Klyuchevskoy Volcano) in 2021–2024

IF 0.9 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS

Journal of Volcanology and Seismology Pub Date : 2026-02-16 DOI:10.1134/S0742046325700526

R. I. Cherkashin, Yu. V. Demyanchuk, I. A. Nuzhdaev, V. A. Tsvetkov, A. L. Khomchanovsky, A. Yu. Ozerov

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Abstract

Based on results of a field ground/unmanned aerial vehicle (UAV) and temperature observations in 2021–2024, the dynamics of morphology and temperature changes of a scoria cone of the Corresponding Member of the RAS G.S. Gorshkov vent (hereinafter, the G.S. Gorshkov vent), which erupted at the Klyuchevskoy volcano from February 18 to March 21, 2021, is analyzed. The morphology of the cinder cone of the vent changed within 3 years after the eruption: the diameter of the base decreased from 136.5 to 122.5 m and the crater size increased from 17 × 19 to 44 × 39 m due to collapses. The maximum cone temperatures decreased from 165.4°C in 2021 to 127.1°C in 2024. The detailed digital UAV survey-based elevation models showed that the steepness of the cinder cone slopes increased by 4°–6°, on average, from 2021 to 2024. The location of the G.S. Gorshkov vent on the large Erman glacier was responsible for the formation of failures and collapse walls up to 25-m deep in the glacier body due to intrusion of incandescent lava. Dynamic morphological changes of the cinder cone are probably also related to the subsidence of the glacier from prolonged contact with hot igneous rocks. Estimated from the Arctic DEM satellite data, the volume of erupted material of the G.S. Gorshkov vent was ~0.003 km³.

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2021-2024年RAS G.S. Gorshkov火山口（克柳切夫斯科伊火山）对应段形态、沉积温度及喷发物体积的动态变化

基于野外地面/无人机（UAV）观测结果和2021 - 2024年的温度观测，分析了2021年2月18日至3月21日在克柳切夫斯科伊火山喷发的RAS G.S. Gorshkov喷口（以下简称G.S. Gorshkov喷口）对应成员火山渣锥的形态和温度变化动态。火山喷发后3年内火山渣锥形态发生变化：火山底部直径由136.5 m减小至122.5 m，火山口大小由17 × 19 m增大至44 × 39 m。最高锥温从2021年的165.4°C下降到2024年的127.1°C。基于无人机精细数字测量的高程模型显示，2021 - 2024年，煤渣锥坡陡度平均增加了4°~ 6°。G.S.戈尔什科夫喷口位于巨大的埃尔曼冰川上，由于炽热的熔岩侵入，在冰川体中形成了高达25米深的失败和崩塌壁。火山渣锥的动态形态变化也可能与冰川长期与热火成岩接触而下沉有关。根据北极DEM卫星资料估算，G.S. Gorshkov喷口喷发物质的体积为~0.003 km3。

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来源期刊

Journal of Volcanology and Seismology 地学-地球化学与地球物理

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Volcanology and Seismology publishes theoretical and experimental studies, communications, and reports on volcanic, seismic, geodynamic, and magmatic processes occurring in the areas of island arcs and other active regions of the Earth. In particular, the journal looks at present-day land and submarine volcanic activity; Neogene–Quaternary volcanism; mechanisms of plutonic activity; the geochemistry of volcanic and postvolcanic processes; geothermal systems in volcanic regions; and seismological monitoring. In addition, the journal surveys earthquakes, volcanic eruptions, and techniques for predicting them.