Imaging magma transport during the 1997 seismic swarm off the izu peninsula, japan
Imaging magma transport during the 1997 seismic swarm off the izu peninsula, japan
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对 1997 年日本伊豆半岛地震群期间的岩浆输送进行成像
DOI：
10.1126/science.286.5441.927
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发表时间：
1999
期刊：
影响因子：
56.9
通讯作者：
S. Shimada
中科院分区：
文献类型：
--
作者：
Y. Aoki;P. Segall;T. Kato;P. Cervelli;S. Shimada
传播的岩浆填充的裂缝的时空演化估计从全球定位系统（GPS）数据的反演，倾斜仪，和水准测量。堤坝以每天50毫米的最大速度打开，每天的最大岩浆流量为2 × 10（6）立方米。虽然空间分辨率是有限的，缓慢向上传播的解决在9天之久的入侵。与此相反，地震群在前12小时内迅速向上迁移，几乎所有的地震能量都在前2天释放。将反演结果与准确的震源位置进行比较，将有助于更好地了解岩浆通过脆性地壳的迁移以及火山地震活动的原因。
The spatio-temporal evolution of a propagating magma-filled crack was estimated from inversion of Global Positioning System (GPS) data, tiltmeters, and leveling. The dike opened at a maximum rate of 50 millimeters per day and had a peak magma flux of 2 x 10(6) cubic meters per day. Although the spatial resolution was limited, slow upward propagation was resolved during the 9-day-long intrusion. In contrast, the earthquakes migrated rapidly upward during the first 12 hours of the swarm, and nearly all of the seismic energy was released in the first 2 days. Comparison of inversion results with accurate hypocenter locations will lead to improved understanding of magma transport through the brittle crust and of the causes of volcanic seismicity.