【摘要】 搜集2008年1月-2010年5月东北地区M_L≥4.0地震波形资料,利用邻省多台P波初动资料,采用P波初动解计算方法,求解2008年1月-2010年5月东北地区M_L≥4.0地震的震源机制解。结合前期工作成果,研究东北地区应力场方向的总体特征和主压、主张应力轴方向的变化,分析P轴走向随时间的变化与东北地区中强地震发生可能的关系。更多还原

【Abstract】 Based on the seismic waveform data of M_L≥4.0 earthquakes happened in Northeast China from January 2008 to May 2010,we made an analysis of the focal mechanism of Northeast China with the use of P wave first motion data of neighboring provinces.Then together with the former acquisition,we studied the general characteristics of stress field direction and the variation of stress axis direction.We also analyzed the relationship between P axis variation against time and the possibility of moderately strong earthquakes happening in Northeast China.更多还原