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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Migration of tremor locations before the 2008 eruption of Meakandake Volcano,Hokkaido, Japan
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Migration of tremor locations before the 2008 eruption of Meakandake Volcano,Hokkaido, Japan

机译：日本北海道Meakandake火山2008年爆发前的震颤位置迁移

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摘要

We estimate the locations of three tremor sequences, denoted A, B, and C, that occurred before the 2008 eruption at Meakandake volcano, eastern Hokkaido, Japan, using the spatial distribution of seismic amplitudes of volcanic tremor. Although we used only five seismic stations, we could estimate the locations of three tremor sequences. We find two different tremor source areas: those of Tremor A located about 2 km southwest of the erupted crater (Area A) and the other about 1 km southeast to south of the crater as that of the Tremor C (Area B). The location of an early phase of the Tremor B is estimated in Area A while the location of its later phase appears to connect the two areas. This location migration during Tremor B occurred simultaneously with other important geophysical phenomena before the eruption event, as suggested by geodetic and geomagnetic studies. Our findings of the two tremor locations of the tremor sequences and location migration during Tremor B may be important for future monitoring activities at Meakandake volcano, particularly to forecast the location of a possible phreatic eruption.
机译：我们利用火山地震震振幅的空间分布，估算了在2008年日本北海道东部Meandandake火山喷发之前发生的三个地震序列（分别为A，B和C）的位置。尽管我们仅使用了五个地震台站，但我们可以估计三个地震序列的位置。我们发现了两个不同的震源区：位于爆发火山口西南2公里处（A区）的震源A区，位于火山口以南东南1公里处（与震颤C区B区相同）的震源区。震颤B的早期阶段的位置估计在区域A中，而震颤B的后期阶段的位置似乎连接了两个区域。大地测量和地磁研究表明，震颤B期间的这种位置迁移与喷发事件之前的其他重要地球物理现象同时发生。我们对震颤序列的两个震颤位置和震颤B期间的位置迁移的发现对于未来Meakandake火山的监测活动，特别是预测可能的潜水爆发的位置，可能是重要的。

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