P-wave velocity structure beneath Asama Volcano, Japan, inferred from active source seismic experiment
P-wave velocity structure beneath Asama Volcano, Japan, inferred from active source seismic experiment
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DOI：
10.1016/j.jvolgeores.2009.09.004
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发表时间：
2009-11-10
影响因子：
2.9
通讯作者：
Yamawaki, Teruo
中科院分区：
文献类型：
--
作者：
Aoki, Yosuke;Takeo, Minoru;Yamawaki, Teruo
利用空前密集的地震仪进行的积极地震调查发现，浅间火山山顶以西有一个高速带。日本。从精确的地震重新定位和地面变形模型推断，高速带与2004年火山喷发有关的岩浆填充裂缝（岩脉）侵入区域相吻合。它还与一个被低电阻率包围的高电阻率区域相吻合，这表明岩浆由于重复侵入而凝固是高速的原因。因此，这证实了以前由地震和大地测量观测推测的岩浆路径。这些发现表明，密集地震勘探与地球物理监测相结合是了解火山喷发动力学的有效途径。(c) 2009 Elsevier B.V.版权所有
An active seismic survey with unprecedented density of seismometers found a high velocity zone to the west of the summit of Asama Volcano. Japan. The high velocity zone coincides with an area of magma-filled crack (dike) intrusion associated with the 2004 eruptions inferred from precise earthquake relocations and ground deformation modeling. It also coincides with an area of high resistivity surrounded by low resistivity, indicating that the solidification of magma due to repeating intrusions is responsible for the high velocity. This thus endorses the magma pathway previously speculated by seismic and geodetic observations. These findings demonstrate that dense seismic exploration combined with geophysical monitoring is an effective way to understand the dynamics of volcanic eruptions. (c) 2009 Elsevier B.V. All rights reserved.