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《Journal of Geodesy and Geodynamics》 2016-11
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Strain-Stress Field Evolution Characteristics in Bohai Bay Area

JI Jing;ZHENG Zhijiang;CHEN Juzhong;GUO Liangqian;Tianjin Earthquake Disaster Prevention Center,Earthquake Administration of Tianjin Municipality;First Crust Monitoring and Application Center,CEA;  
Using Bohai Bay region GPS rate data from 1999 to 2013,Ying-Wei fault zone is divided into two blocks,and we calculate the principal strain rate and the strain rate on the fault zone.The regional strain-stress field calculation results are studied.Results show that the 1999-2011 Bohai Bay regional crust as a whole presents NEE-SWW compressive stress and NNW-SSE tensile stress effect.For 2011-2013,the regional crust presents a N-S direction,tensile stress is nearly in an E-W direction.The main cause of the change is the Japan 3.11 earthquake in 2011.Bohai Bay area is different in localized changes obviously.The Ying-Wei fault zone presents normal strain and the shear strain rates are also different at different times;in 1999-2011 it presents dextral shear strain-shear stress,whereas in 2011-2013 it shows sinistral shear strain-shear stress.
【Fund】: 国家自然科学基金(41472180);; 中国地震局地震科技星火计划(XH13037Y);; 天津市地震局青年基金(20131021)~~
【CateGory Index】: P315.2
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