Apparent Stress Changes of the 2010 Luanxian Earthquake Sequence

作     者：Li He Liu Wenbing Wang Yixi Zhang Jieqing Gao Ye Kang Jian Zhang Changxuan 

作者机构：Earthquake Administration of Tianjin Municipality Institute of GeophysicsCEA 

出 版 物：《Earthquake Research in China》 (中国地震研究（英文版）)

年 卷 期：2015年第29卷第3期

页      面：293-302页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：funded by the Spark Program of the Earthquake Sciences(XH14005Y) Seismic Situation Tracing Youth Task in 2015(2015010307) Subjects of "Earthquake Monitoring,Prediction and Scieatific Research of 2015",Earthquake Administration of Tianjin Municipality,China(150201) 

主　　题：Apparent stress Focal mechanism solution Luanxian earthquake sequence 

摘      要：On March 6,2010,an earthquake of M L4. 5 took place in Luanxian,Hebei Province,with plenty of foreshocks and aftershocks. From December 2009 to March 2010,a series of M L≥ 2. 5 earthquakes were recorded by the digital seismic network of the capital region,which were selected to calculate the apparent stress in this region. The results show that,firstly,a high value anomaly of apparent stress appeared before the M L4. 5 and peak value appeared on the main shock, which then decreased after the ML4. 5 earthquake. The apparent stress of the main shock is much greater than that of most aftershocks,the sequence type is considered as a main shock-aftershock. Secondly,the size of apparent stress perfectly reflects the state of the stress field in the hypocenter region,and we can discuss seismic sequence properties through the changing process of apparent stress,in combination with the traditional methods to identify a sequence more accurately. Finally,in the case of magnitude less than or equal to M L3. 3,correlation between magnitude and apparent stress is positive.