2015年新疆皮山6.5级地震前岩石圈磁场局部异常特征分析  

Analysis of Local Lithospheric Magnetic Field Anomalies Characteristics before Xinjiang Pishan M_S6.5 Earthquake in 2015

作　　者：丁新娟[1] 杨福喜[1] 贾路 王粲[2] DING Xinjuan YANG Fuxi JIA Lu WANG Can(Earthquake Agency ofXinjiang Uygur Autonomous Region, Urumqi 830011, Xinjiang, China Institute of Geophysics, China Earthquake Administration, Be ijing 100081, China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011 [2]中国地震局地球物理研究所,北京100081

出　　处：《地震研究》2017年第3期362-367,共6页Journal of Seismological Research

基　　金：2015年度地震行业专项<中国综合地球物理场观测-大华北地区>(201508009);新疆地震科学基金(201713)联合资助

摘　　要：利用2013—2015年南北天山地区3期可靠的流动地磁矢量观测资料,计算获得相邻两期区域岩石圈磁场变化。分析2015年新疆皮山6.5级地震前岩石圈磁场的局部变化特征,研究这种演化特征与该地震的关系,结果表明岩石圈磁场局部异常与测区内地震在空间上有一定的对应关系,岩石圈磁场各要素在震中表现出不同程度的异常。By using reliable three periods mobile geomagnetic vector observation data in the north and south Tianshan Mountain area during 2013 and 2015, we obtained the differences between two successive periods of the lithos- pheric geomagnetic field. Then we analyzed the variation characteristics of the lithosphere local magnetic field be- fore Pishan Ms6. 5 occurred on Jul. 3, 2015 in Xinjiang, and we studied the relationship between the evolution characteristics and the earthquake. The analysis results showed that there is a certain corresponding relationship between the local anomaly of the lithospheric magnetic field and the earthquake in the area, and all the elements of the lithosphere magnetic field showed abnormal characteristics in the epicentral area.

关 键 词：地磁测量 岩石圈磁场 皮山6.5级地震 

分 类 号：P318[天文地球—固体地球物理学]