昆仑8.1级地震对青藏块体东北缘地壳水平运动的影响初探  

Preliminary study on the influence of earthquake to crustal horizontal movement of northeastern margin of Qinghai-Tibet block

作　　者：于志忠 冯丽丽[2] 李天文[2] 梁伟峰[3] 王庆良[3] 崔笃信[3] 

机构地区：[1]吉林省地矿测绘院,长春130062 [2]西北大学城市与资源学系,西安710069 [3]中国地震局第二监测中心,西安710054

出　　处：《测绘科学》2007年第3期106-107,共2页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(40271089);国家重大科学工程"中国地壳运动观测网络"项目

摘　　要：为了探讨昆仑8.1级地震引起的同震形变是否影响了青藏块体东北缘的地壳水平运动,以震后GPS观测资料为数据源,依Okada位错模型原理,计算了地震引起的同震水平位移场,分析了地震对区域地壳水平运动的影响。结果表明:垂直于断层沿震中方向的GPS点受地震影响大,远离断层的测点的同震位移受断层位错的影响小。The 14 November, 2001, Ms 8.1 west Kunlun earthquake is the largest event that has occurred in the Tibetan Plateau since 1951. In order to examine the influence of the earthquake on the crustal motion, taking Kunlun Ms 8.1 earthquake as an example, using GPS data measured after Kunlun Ms 8.1earthquake as data source, and using Okada dislocation model as principle, the authors compute the coseismic horizontal displacement field. They also analyze the effect on local crustal horizontal motion. The results indicate that the GPS spots which plumb the fault along epicenter direction are more affected, while the influences of fault dislocation to the co-meismic displacement of the spots is less.

关 键 词：GPS Okada位错模型 青藏块体东北缘 地壳水平运动 

分 类 号：P315.2[天文地球—地震学]