文章基本信息

标题：Correlation between magma chamber deflation and eruption cloud height during the 2011 Shinmoe-dake eruptions
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作者：Tomofumi Kozono ; Hideki Ueda ; Toshiki Shimbori 等
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2014
卷号：66
期号：1
页码：1-8
DOI：10.1186/s40623-014-0139-1
出版社：Springer Verlag
摘要：Multiple observations of subsurface and surface phenomena during volcanic eruptions provide important information about eruption styles, eruption column dynamics, and magma plumbing systems.During the 2011 eruptions of Kirishima-Shinmoe-dake volcano in Japan, borehole-type tiltmeter data and weather radar data captured the subsurface and surface phenomena, respectively; the tiltmeters detected deflation of a magma chamber caused by migration of magma to the surface, and the weather radar detected changes in the height of the eruption cloud echo.In this study, we present a method based on the correlation between magma chamber deflation and cloud echo height to identify eruption styles.The method can detect whether a column-forming eruption is accompanied by magma migration from the magma chamber (e.g., sub-Plinian eruption), or not (e.g., Vulcanian explosion).By using well-correlated chamber deflation and echo height data, we found that eruption column dynamics during the Shinmoe-dake eruptions are well described by a one-quarter power scaling relationship between cloud height and magma discharge rate, and that a clear correlation between geodetic volume change of the magma chamber and the erupted volume indicates a stable magma plumbing system connecting the magma chamber and the surface.
关键词：Eruption style ;Eruption dynamics ;Magma chamber deflation ;Eruption cloud height ;Tiltmeter ;Weather radar ;Shinmoe-dake