Atmospheric electrical effects during a strong explosive eruption of Bezymyanniy volcano (Kamchatka Peninsula, Russia) on December 20, 2017

• Published in: IOP Conference Series: Earth and Environmental Science
• Main Authors: Firstov, P P, Akbashev, R R, Malkin, E I, Cherneva, N V, Druzhin, G I
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2021
• Subjects: Kamchatka Peninsula; Kamchatka
• Online Access: http://dx.doi.org/10.1088/1755-1315/840/1/012020; https://iopscience.iop.org/article/10.1088/1755-1315/840/1/012020; https://iopscience.iop.org/article/10.1088/1755-1315/840/1/012020/pdf

Abstract A set of parameters of various geophysical methods is considered, which made it possible to quite clearly represent the mechanism of the explosive eruption of Bezymyanny volcano on January 20, 2017. The explosion began according to the «soft» scenario, which was reflected both in the seismic method and in the thunderstorm activity of the eruptive cloud (EC). The transition to Plinian activity was accompanied by the generation of an infrasonic signal and an increase in lightning discharges in the EC. The two-tiered EC was well traced in the potential gradient response in atmospheric electric field. The combination of various geophysical methods provides a detailed understanding of the mechanism of explosive eruptions and contributes to a better understanding of the physics of the explosive process on volcanoes.