Displacement Above the Hypocenter of the 2011 Tohoku-Oki Earthquake
Displacement Above the Hypocenter of the 2011 Tohoku-Oki Earthquake
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DOI：
10.1126/science.1207401
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发表时间：
2011-06-17
期刊：
影响因子：
56.9
通讯作者：
Asada, Akira
中科院分区：
文献类型：
--
作者：
Sato, Mariko;Ishikawa, Tadashi;Asada, Akira
2011年日本东北海域发生9.0级矩震级大冲断地震。结合全球定位系统(GPS)和声学数据，我们探测到与震源区正上方的这次事件有关的非常大的海底运动。水平位移超过20米的地区，即比陆地上探测到的水平位移大4倍的地区，沿着海沟绵延数十公里长；最大的量达到震中上方向东南偏东方向约24米。此外，与观测到的地面下沉相反，发生了近3米的垂直抬升。
The moment magnitude (Mw) = 9.0 2011 Tohoku-Oki mega-thrust earthquake occurred off the coast of northeastern Japan. Combining Global Positioning System (GPS) and acoustic data, we detected very large sea-floor movements associated with this event directly above the focal region. An area with more than 20 meters of horizontal displacement, that is, four times larger than those detected on land, stretches several tens of kilometers long along the trench; the largest amount reaches about 24 meters toward east-southeast just above the hypocenter. Furthermore, nearly 3 meters of vertical uplift occurred, contrary to observed terrestrial subsidence.