The 2011 Tohoku-Oki Earthquake: Displacement Reaching the Trench Axis
The 2011 Tohoku-Oki Earthquake: Displacement Reaching the Trench Axis
复制标题
DOI：
10.1126/science.1211554
复制
发表时间：
2011-12-02
期刊：
影响因子：
56.9
通讯作者：
Kaneda, Yoshiyuki
中科院分区：
文献类型：
--
作者：
Fujiwara, Toshiya;Kodaira, Shuichi;Kaneda, Yoshiyuki
我们通过多波束测深测量检测并测量了2011年3月11日东北冲岐地震[矩震级（MW）9.0]引起的同震位移。地震前后获得的测深数据之间的差异显示，位移延伸到日本海沟的轴线，这表明断层破裂到达了海沟轴线。最外侧向陆区域的海底水平向东南偏东移动了约50米，向上移动了约10米。除了垂直位移外，巨大的水平位移还使向陆坡的海底抬升了16米。
We detected and measured coseismic displacement caused by the 11 March 2011 Tohoku-Oki earthquake [moment magnitude (MW) 9.0] by using multibeam bathymetric surveys. The difference between bathymetric data acquired before and after the earthquake revealed that the displacement extended out to the axis of the Japan Trench, suggesting that the fault rupture reached the trench axis. The sea floor on the outermost landward area moved about 50 meters horizontally east-southeast and ~10 meters upward. The large horizontal displacement lifted the sea floor by up to 16 meters on the landward slope in addition to the vertical displacement.