北天山西段中强地震前地倾斜异常的演化分析  

ANALYSIS OF TILT ANOMALY EVOLUTION BEFORE MID-STRONG EARTHQUAKES IN WEST OF NORTHERN TIANSHAN

作　　者：杨又陵[1] 高国英[1] 

机构地区：[1]新疆维吾尔自治区地震局,乌鲁木齐830011

出　　处：《大地测量与地球动力学》2005年第1期98-101,共4页Journal of Geodesy and Geodynamics

基　　金：中国地震局"十五"科研攻关项目(01-03-03)

摘　　要：研究了北天山西段3次5级地震前地倾斜异常的特征,得出:在时间上呈较明显的阶段性,空间上存在 由西向东迁移(向震中迁移)的过程。并用震源机制解的结果对地倾斜的异常特征作了较好的解释。北天山85°经 线东西两侧震源机制解差异明显,表明这一地区受力环境较为复杂。We sum up the characteristics of tilt anomalies before 3 earthquakes with %M%s5 in the west of northern Tianshan Mountain and think that the anomalies are of the staged characteristics in time and there is a moving process from west to east in space.We used the results of focal mechanism solution to explain abnormal characteristics of tilt very well.The apparent difference of focal mechanism solution in the east and the west of longitude 85° in the northern Tianshan Mountains shows that in this region the environment is forced complicatedly.

关 键 词：北天山 地倾斜 震源机制解 异常特征 中强地震 震中 经线 过程 迁移 阶段性 

分 类 号：P315[天文地球—地震学] P542[天文地球—固体地球物理学]