Abstract：Using the data of GPS fiducial stations in China and IGS stations around the epicenter, we studied the horizontal microdynamic crustal deformations before and after Indonesia \%M\%w9.0 earthquake in far field. The E component showed regional distinction changes before the earthquake. It was that the stations located in northeast 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 largescale space, corresponding better with the theoretical seismogenic patterns. Small but significant coseismic jumps are clearly detected by the stations which are more than 3 000 km far from the epicenter. The coseismic deformation vectors almost pointed towards the earthquake epicenter on the whole, reflecting the flocking impact of the diving slab towards overlaying plate on a farfield. And some of these sites change their dislocations obviously acted by the strong movement of earthquake fault after the earthquake.
Wang Mei ,Jiang Zaisen ,Wu Yanqiang et al. FAR FIELD HORIZONTAL MICRO-DYNAMIC CRUSTAL DEFORMATIONSBEFORE AND AFTER INDONESIA Mw9.0 EARTHQUAKE[J]. jgg, 2011, 31(3): 29-33.
