【摘要】 2014年2月12日新疆于田发生MS7.3地震,震中位于平均海拔5 500m的藏北地区。本文利用国产GF-1号卫星对震前、震后数据进行对比解译,快速获取了该次地震的同震地表破裂带,破裂带沿硝尔库勒盆地南缘的多个洪积扇体后缘发育,断续延伸,走向NEE62°,以弧形断层陡坎为主,未见明显水平位错,长度约9km。阿尔金断裂在硝尔库勒盆地共发育3条分支断裂,均发育古地震破裂带,其中沿盆地北缘和中部的分支断裂未见同震破裂,最新地表破裂带位于南缘断裂的东北段。结合震后余震分布,确认该次地震的发震构造为硝尔库勒南缘断裂,是青藏高原北部阿尔金断裂带西段尾端张性区的一次新破裂事件。本次应用也展现了国产高分辨率数据在中国西部高海拔地区地震应急工作中所发挥的重要作用。更多还原

【Abstract】 An MS7.3earthquake happened at Yutian county of Xinjiang on February 12,2014.Interpretaion of images from China-made high resoultion satellite GF-1indicates that the surface rupture zone produced by the earthquake is about 9km long along a NEE62°trending fault at the southern piedmont of a Xiaoerkule basin.The surface rupture zone consists of arc fault scarp segments with only normal-lateral faulting and no significance left-lateral component based on the data.Its seismogenic structure NEE-trending fault named Xiaoerkuke southern basin piedmont fault belongs to the secondary structure at the NE-trending tensile area of the southwestern end of the Altyn Tagh fault,with paleo-earthquake surface ruputer zones,there were no coseismic ruptures on the other two faults located at the basin northern piedmont and central area.The high resoultion saltellite images collected by domestic emergency mode after shock can be effectivelly used for seismology and geology research at high-altitude weastern areas of China.更多还原