摘要
探讨汶川8.0级地震前龙门山断裂带区域地倾斜面的形变特征,分析表明震前区域地倾斜面在水平形变变化上呈现由龙门山断裂带两侧向中央挤压特征;垂直形变变化呈现龙门山断裂带西北侧的后山断裂持续抬升隆起,东南侧前山断裂的雅安等区域持续下沉特征;震源附近的汶川区域地倾斜面从2005年下半年至2006年出现了垂直和水平形变显著加速增大的趋势。
The deformation characteristic changes of the crustal tilt surface in Longmenshan fault zone betbre Wenchuan Ms8.0 earthquake is discussed. The analysis shows that before the earthquake in the horizontal deformation change tilt surface there appeared the compresional characteristics from the two sides to central part of the fault zone and in the vertical deformation change of the Houshan fault which is on the northwest side of the Longmenshan fault was continuously lifting and the Qianshan fault on the southeast side of the Longmenshan fault subsiding. The Wenchuan area near the seismic focus presented evidently accelerative and inccreasing of the vertical and horizontal deformation characteristics from late 2005 to 2006.
出处
《大地测量与地球动力学》
CSCD
北大核心
2011年第B06期6-9,共4页
Journal of Geodesy and Geodynamics
基金
中国地震局"南北地震带北段大震危险性强化跟踪研究"课题
关键词
汶川地震
龙门山断裂带
地倾斜
面倾角
面方位角
Wenchuan Ms8.0 earthquake
Longmenshan fault zone
crustal tilt
surface inclination
surface azi-muth
