日本9.0级地震后依舒断裂带北段地震活动性分析  

Seismic Activity Analysis of the Northern Segment of Yishu Fault Zone after M9.0 Earthquake in Japan

作　　者：常金龙 甘卫军[3] 胡宝慧 王同庆[4] CHANG Jinlong;GAN Weijun;HU Baohui;WANG Tongqing(Heilongjiang Earthquake Agency,24 Hongxiang Road,Harbin 150090,China;Hegang Seismic Station of Heilongjiang Earthquake Agency,Hexing Village,Shuyuan Town,Hegang 154101,Chin;Institute of Geology,CEA,Al Huayanli Road,Beijing 100029,China;The First Monitoring and Application Center,CEA,7 Naihuo Road,Tianjin 300180,China)

机构地区：[1]黑龙江省地震局,哈尔滨市鸿翔路24号150090 [2]黑龙江省地震局鹤岗地震台,黑龙江省鹤岗市蔬园乡合兴村154101 [3]中国地震局地质研究所,北京市华严里甲1号100029 [4]中国地震局第一监测中心,天津市耐火路7号300180

出　　处：《大地测量与地球动力学》2018年第8期787-790,800,共5页Journal of Geodesy and Geodynamics

基　　金：中国地震局"三结合"课题(160803);中国地震局地震行业科研专项(201508009)~~

摘　　要：结合测震学和大地测量学方法分析日本2011年9级地震之后依舒断裂带北段的地震活动性认为,2012年至今研究区地震活动相对平静是由于日本地震对区域应力场的影响。依舒断裂带北段震后1a内受影响较大,2a后地震活动减弱,b值的时间扫描表现出其目前处于低应力场控制。依舒断裂带北段2012年至今5a未发生4级以上地震,当前存在发生4级地震的可能。Using seismic and geodetic methods,we analyze the seismicity of the northern segment of the Yishu fault zone after the 2011 M9.0 magnitude earthquake in Japan.It is considered that the relative quiescence of seismicity in the region since 2012 is due to the fact that the M9.0 earthquake in Japan affected the regional stress field.The northern section of the Yishu fault zone is greatly affected within 1 year of the earthquake,and the seismicity declined after 2 years.A time scan of b values also shows that the northern segment of the Yishu fault zone is now under low stress field control.No earthquakes greater than magnitude 4 occurred in the northern section of the Yishu fracture zone since2012,although there is a possibility of an earthquake of magnitude 4.

关 键 词：依舒断裂带北段 B值 地震复发周期 GPS 流动重力 

分 类 号：P315[天文地球—地震学]