大地测量与地球动力学2011，Vol.31Issue(3)：29-33,5.
印尼9.0级地震前后远场水平地壳微动态变形
FAR FIELD HORIZONTAL MICRO-DYNAMIC CRUSTAL DEFORMATIONS BEFORE AND AFTER INDONESIA Mw9.0 EARTHQUAKE
摘要
Abstract
Using the data of GPS fiducial stations in China and IGS stations around the epicenter, we studied the horizontal micro-dynamic crustal deformations before and after Indonesia Mw9.0 earthquake in far field. The E component showed regional distinction changes before the earthquake. It was that the stations located in north-east from the epicenter moved east, controlled by pinching action, whereas, stations located in northwest from the epicenter moved west ward, effected by stretching force. It showed a characteristic of harmony and consistency in a large-scale space, corresponding better with the theoretical seismogenic patterns. Small but significant co-seismic jumps are clearly detected by the stations which are more than 3 000 km far from the epicenter. The co-seismic deformation vectors almost pointed towards the earthquake epicenter on the whole, reflecting the flocking impact of the diving slab towards overlaying plate on a far-field. And some of these sites change their dislocations obviously acted by the strong movement of earthquake fault after the earthquake.关键词
GPS/苏门答腊9.0级地震/同震位移/水平形变/远场Key words
GPS/ Indinesia Mw 9.0 earthquake/ co-seismic displacement/ horizontal deformation/ far field分类
天文与地球科学引用本文复制引用
王梅,江在森,武艳强,冯志军..印尼9.0级地震前后远场水平地壳微动态变形[J].大地测量与地球动力学,2011,31(3):29-33,5.基金项目
2011年度震情跟踪工作任务(2011013701) （2011013701）
山东省地震局合同制项目(10y10) （10y10）
