- 责任者：Yang Guohua (First Crust Monitoring and Application Center ; CEA ; Tianjin 300180 ; China) ; Yang Bo
- 刊名：Journal of Seismological Research
- 出版年：2012
- 卷期：35(3)
- 关键词：大震 ; great earthquakes ; 地形变 ; ground deformation ; 全球定位系统 ; Global Positioning System ; 青藏高原 ; Qinghai-Tibetan Plateau
- 页码：p.295-302
- 图表：3 illus., 18 refs.
- 分类号：0500
- issnNo：ISSN1000-0666
- isbnNo：CN53-1062/P
Based on the GNSS observation data and its processing result from 1999 to 2007 and from 2009 to 2011 in the northeastern edge of Qinghai-Tibetan Plateau, the authors analyzed the horizontal deformation field and its variation before and after Wenchuan M8.0 and Yushu M7. 1 earthquakes. The results show as follows：1) the rate and direction of horizontal movement changed obviously, but it was clear and ordered; 2) the principal compressive strain from 1999 to 2007 had more orderliness and consistency, but the size and space distribution of maximal principal compressive strain from 2009 to 2011 is different. However, the direction of it remained the same; 3) the space distribution of the maximal shear strain rate from 2009 to 2011 showed a banding distribution along the north-west direction; and 4) the revolving shear deformation from 1999 to 2007 showed bending distribution along NW direction and was orderly alternate change with left-lateral and dextral. In a word, there were major changes of crustal deformation after earthquakes and it might be on still.