Abstract

This paper gives measured quantities, inclined distances, and elevations between geodetic monuments on the northeastern slope of Klyuchevskoi Volcano for the period from 1978 through 2014. Parasitic and summit eruptions were generally preceded by uplifts of the slope, while the termination of an eruption was accompanied by subsidence. The data from the longest series of observations of vertical displacements on the Kirgurich radial line during the period from 1979 to 2014 were used to determine an uplift of the slope that was increasing nearer to the crater. The maximum displacements occurred 2 years before the start of the 1983 parasitic eruption on the Predskazannyi vent and before the 2003–2004 and 2007 summit eruptions. A ground uplift of 12.5 microradians measured on a 17.8-km baseline was recorded in 2007. Farther from the crater, at a distance of 27 km from it, the vertical displacements were insignificant. We show that the measurement stations at heights of 2000 m to 3000 m were subject to deep creep, i.e., a sliding movement. The rates of movement at these stations reached 5–20 cm/yr. Significant horizontal displacements of geodetic monuments occurred near the parasitic eruptions of March 6, 1980 and March 8, 1983. All lines of measurements were observed to shrink by 5 to 20 mm in 1989‒1993 to 2014, indicating a compression for the northeastern slope of Klyuchevskoi Volcano.

中文翻译：

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基于大地测量数据的1978-2014年堪察加半岛Klyuchevskoi火山地表变形

摘要

本文给出了1978年至2014年期间Klyuchevskoi火山东北坡上大地测量古迹之间的测量数量，倾斜距离和高程。寄生虫和山顶喷发通常在坡度升高之前发生，而喷发终止则伴随着通过沉降。从1979年至2014年期间在Kirgurich径向线上最长的一系列垂直位移观测数据中，得出的数据用于确定在靠近火山口处逐渐增加的斜坡的隆升。最大位移发生在1983年Predskazannyi喷口寄生虫爆发开始之前以及2003-2004年和2007年顶峰爆发之前的两年。2007年记录到在17.8公里的基线上地面上升了12.5微弧度。离火山口更远，在距它27公里的距离处，垂直位移微不足道。我们表明，高度为2000 m至3000 m的测量站经受了深蠕变，即滑动运动。这些站的移动速度达到5-20厘米/年。在1980年3月6日和1983年3月8日的寄生火山喷发附近，大地古迹出现了明显的水平位移。在1989‒1993年至2014年期间，所有测量线都收缩了5到20 mm，表明东北坡的压缩。 Klyuchevskoi火山。