汶川8级地震前后陕西地形变异常特征分析  

ANALYSIS ON DEFORMATION ANOMALOUS CHARACTERISTICS IN SHAANXI PROVINCE BEFORE AND AFTER WENCHUAN Ms 8.0 EARTHQUAKE

作　　者：邢西淳[1] 毛娟[1] 邵辉成[2] 

机构地区：[1]陕西省地震局泾阳地震台,陕西咸阳713704 [2]陕西省地震局,陕西西安710068

出　　处：《高原地震》2011年第4期17-23,共7页Plateau Earthquake Research

基　　金：南北地震带北段大震危险性强化跟踪研究(2009-2011)

摘　　要：分析了汶川8.0级地震前后的关中垂直形变及陕西地区地倾斜变化特征。结果表明:震前,跨断层垂直形变表现出阶段性变化特征,南大同、大塬、涧峪口、清河口、口镇等场地的垂直形变出现了明显的趋势转折、加速变化。汉中、宝鸡、乾县、西安台的地倾斜潮汐因子γ存在3个月左右异常变化。The characteristics of vertical deformation in Guanzhong area and the ground tilt in Shaanxi province are analyzed. The results show that the vertical deformation appeared periodic, tendency turning and acceleration variation in Nandatong, Dayuan, Jianyukou, Qinghekou, Kouzhen; the tidal factor y of ground tilt appeared anomalous variation about three months before Wenchuan Ms 8.0 earthquake.

关 键 词：汶川地震 垂直形变 潮汐因子γ 

分 类 号：P315.755[天文地球—地震学]