Earthquake Source Fault Beneath Tokyo
Earthquake Source Fault Beneath Tokyo
复制标题
DOI：
10.1126/science.1110489
复制
发表时间：
2005-07
期刊：
影响因子：
56.9
通讯作者：
Hiroshi P. Sato;N. Hirata;K. Koketsu;D. Okaya;S. Abe;R. Kobayashi;M. Matsubara;T. Iwasaki;T. Ito;T. Ikawa;T. Kawanaka;K. Kasahara;S. Harder
中科院分区：
文献类型：
--
作者：
Hiroshi P. Sato;N. Hirata;K. Koketsu;D. Okaya;S. Abe;R. Kobayashi;M. Matsubara;T. Iwasaki;T. Ito;T. Ikawa;T. Kawanaka;K. Kasahara;S. Harder
毁灭性的地震发生在东京大都市区下面的一个巨型逆冲断层上。我们利用深地震反射剖面确定该断层为菲律宾海板块的上表面。该板块顶部的深度为4至26公里，比以前根据地震活动分布所作的估计要浅得多。这种较浅的板块几何形状改变了1923年关东地震的最大有限滑移的位置，并将影响东京地区地震危险性分析中强地面运动的估计。
Devastating earthquakes occur on a megathrust fault that underlies the Tokyo metropolitan region. We identify this fault with use of deep seismic reflection profiling to be the upper surface of the Philippine Sea plate. The depth to the top of this plate, 4 to 26 kilometers, is much shallower than previous estimates based on the distribution of seismicity. This shallower plate geometry changes the location of maximum finite slip of the 1923 Kanto earthquake and will affect estimations of strong ground motion for seismic hazards analysis within the Tokyo region.