Earth Sciences

Influence of conduit and topography complexity on spine extrusion at Shiveluch volcano, Kamchatka

T. R. Walter, E. U. Zorn, et al.

Dive into the intriguing world of volcanic activity with this study that explores the fascinating extrusion of a lava spine at Shiveluch volcano in 2020, revealing insights into magma dynamics and potential hazards, as investigated by Thomas R. Walter and colleagues.

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Playback language: English

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Abstract

This study combines remote sensing observations with analog and numerical experiments to investigate the extrusion of a lava spine at Shiveluch volcano in 2020. Spine growth was preceded by dome bulging, followed by asymmetric extrusion along a fracture line. Analysis of webcam imagery, radar, and photogrammetry data constrained spine dimensions (~300 m diameter), extrusion velocity (1.7 m/day), and discharge rate (0.3–0.7 m³/s). Modeling suggests the spine's northward inclination resulted from topographic effects and subsurface conduit architecture, highlighting the influence of mechanical heterogeneities and topographic buttressing on spine growth and instability. The findings are significant for understanding spine growth, collapse hazards, and magma conduit architecture.

Publisher

Communications Earth & Environment

Published On

Jul 27, 2022

Authors

Thomas R. Walter, Edgar U. Zorn, Claire E. Harnett, Alina V. Shevchenko, Alexander Belousov, Marina Belousova, Magdalena S. Vassileva

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