Abstract

The Klyuchevskoi stratovolcano is one of the largest and most active volcanoes in the world; changes of varying sizes have affected the morphology of its surface during historical time. These rock failures mostly occur in long-lived geologic features, namely, volcano-tectonic chutes. Several researchers have made forecasts of failures based on the relief and morphology of the volcano, the system of tectonic discontinuities within its edifice, the localization of parasitic eruptions, the emplacement of intrusions and dikes that have dissected the edifice, glacier activity on the slopes, and other factors. The part played by seismic activity in the preparation and occurrence of major rockfalls and landslides on the volcano has not been previously studied in its own right. The present paper contains an analysis of Klyuchevskoi seismicity related to eruption periods as a key factor to induce deformation and major rockfalls and landslides due to various causes. According to the spatial distribution of earthquakes and the associated seismic energy, the northwestern and southeastern sectors of the volcano are prone to major collapses. This appears to be due to an extension of the edifice in relation to a north-northeast striking fault that traverses the edifice.

中文翻译：

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堪察加半岛Klyuchevskoi火山内生过程和外生过程激发的地震因素

摘要

Klyuchevskoi层状火山是世界上最大，最活跃的火山之一。在历史时期内，大小变化会影响其表面形态。这些岩石破坏大多发生在长期存在的地质特征中，即火山构造滑槽。几位研究人员根据火山的浮雕和形态，其建筑物内的构造不连续系统，寄生喷发的位置，解剖该建筑物的侵入体和堤防的位置，斜坡上的冰川活动，和其他因素。地震活动在火山主要崩落和滑坡的形成和发生中所起的作用，以前还没有单独进行过研究。本文对与喷发期有关的Klyuchevskoi地震活动进行了分析，将其作为诱发形变以及由于各种原因引起的主要岩崩和滑坡的关键因素。根据地震的空间分布和相关的地震能量，火山的西北和东南部容易发生严重坍塌。这似乎是由于建筑物相对于横跨该建筑物的东北向走向的断层的延伸所致。