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据覆盖日本全境的GEONET网络GPS观测资料显示,2011年3月11日的日本宫城MW9.0级地震造成日本半岛向东移动,最大达到了5.3m.利用国家重大科技基础设施项目“中国大陆构造环境监测网络”的GPS观测资料,分析此次地震对中国大陆构造形变场的同震影响,结果显示,地震造成我国东北和华北地区产生毫米至厘米级的同震水平位移,最大值为35mm.通过应变分析发现,地震导致东北和华北地区一系列北北东走向的断裂产生了不同程度的张性应变.虽然在东北地区张性应变相对比较明显,最大处约为40nano-strain,但对断裂带的静态库仑应力加载有限,不会对区域地震活动产生大的影响.
According to the GPS data of GEONET network covering Japan, the Japanese Mw9.0 earthquake in Miyagi, Japan, on March 11, 2011 caused the Peninsula to move eastward to a maximum of 5.3m. Using the major national science and technology infrastructure project “ China tectonic environment monitoring network ”GPS observation data to analyze the impact of the earthquake on the tectonic deformation field in mainland China, the results show that the earthquake caused northeast and north China to produce mm to centimeter level of coseismic horizontal displacement, the largest The value is 35mm.According to the strain analysis, it is found that the earthquakes cause some extensional strains in a series of northeastern and northeastern faults in northeastern and north China.Although the tensile strain is relatively obvious in northeastern China, the maximum is about 40nano-strain , But the static Coulomb stress loading on the fault zone is limited and it will not have a big impact on the regional seismic activity.