基于高频GPS的沂沭断裂带两侧震时位移分析  

Seismic displacement analysis of Yishu fault zone based on high frequency GPS

作　　者：吴玉鑫 韩保民 徐工[1] WU Yuxin;HAN Baomin;XU Gong(School of Architecture Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学建筑工程学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2022年第5期38-43,共6页Journal of Shandong University of Technology:Natural Science Edition

基　　金：国家自然科学基金项目(41074001)。

摘　　要：利用GAMIT/TRACK软件,对各观测站的高频GPS连续观测数据进行处理。研究了2011年3月11日在日本发生的9.0级地震对沂沭断裂带两侧观测站的影响,分析了各个观测站的永久位移以及在地震期间的位移变化轨迹;研究了山东与其周边地区以及沂沭断裂带两侧所处地区在地震期间的运动状态。结果表明:沂沭断裂带两侧观测站受到日本9.0级地震的影响之后,主要在东西方向和南北方向发生了较明显的位移变化,而在垂直方向发生的变化相对较小;沂沭断裂带西侧观测站大致向西运动,东侧的观测站大致向东移动,并且位于北侧的观测站的变化大于位于南侧的观测站的变化;在日本地震期间,该断裂带处于拉伸的状态,并且北半段地区的拉伸程度大于南半段。GAMIT/TRACK software was used to process the continuous high frequency GPS observation data of each observation station and the influences of the 9.0 magnitude earthquake in Japan on the observation stations on both sides of the Yishu fault zone on March 11,2011 were studied.The permanent displacement of each observation station and the displacement change track during the earthquake were analyzed.The motion of Shandong Province and its surrounding areas as well as the two sides of the Yishu fault zone during earthquakes were studied.The results showed that affected by the 9.0 magnitude earthquake in Japan,the observation stations on both sides of the Yishu fault zone had obvious displacement changes,mainly in the east-west direction and north-south direction,while the changes in the vertical direction were relatively small.The observation stations on the west side of the Yishu fault zone moved roughly to the west direction,while the observation stations on the east side moved roughly to the east direction.In addition,the variation of observation stations located in the north was greater than that of observation stations located in the south,which indicated that during the Japanese earthquake,the fault zone was in a state of stretching,and the stretching degree of the northern half was greater than that of the southern half.

关 键 词：高频GPS 沂沭断裂带 GAMIT/TRACK 震时位移 

分 类 号：P228.4[天文地球—大地测量学与测量工程]