Abstract

The waveforms and spectral content of the earthquakes that were recorded during the period of higher activity on Avachinsky Volcano in 2019 were studied to identify three commonly accepted types of volcanic earthquake (VE), viz., volcano-tectonic, hybrid, and long-period events, as well as a fourth type, a “special” VE type having certain special features in its waveforms. We have identified 15 plane-oriented clusters and determined characteristics of the seismogenic planes. An analysis of the seismic events that were recorded in the fall of 2019 on the Molodoi Konus of Avachinsky Volcano suggests that the resumption of activity was related to the magma bodies due to the 1991 eruption which exist in the cone body and to their interaction with atmospheric precipitation. The most likely cause of light flashes above the crater observed on December 8 seems to have been interaction between hydrogen-charged volcanic gas and air oxygen.

中文翻译：

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2019年阿瓦钦斯基火山恢复活动

摘要

研究了 2019 年阿瓦钦斯基火山高活动期间记录的地震的波形和频谱内容，以确定三种普遍接受的火山地震 (VE) 类型，即火山构造地震、混合地震和长周期地震。事件，以及第四种类型，一种“特殊”的 VE 类型，其波形具有某些特殊特征。我们已经确定了 15 个面向平面的集群，并确定了地震发生平面的特征。对 2019 年秋季在阿瓦钦斯基火山 Molodoi Konus 上记录的地震事件的分析表明，活动的恢复与 1991 年火山喷发导致的岩浆体有关，该岩浆体存在于锥体中，以及它们与大气的相互作用沉淀。