2010年青海玉树Ms7.1地震地表破裂特征的高分辨率遥感分析

2010年4月14日Ms7.1青海玉树地震与北西向的甘孜—玉树活动断裂的活动有关,造成了沿断裂带分布的地表破裂以及房屋建筑设施的严重破坏.本文通过Landsat ETM+影像和SPOT影像分析了甘孜—玉树断裂的第四纪活动特征,即断层崖和拉分盆地,冲沟左旋错断现象.地震后获取的高分辨率航空遥感影像解译结果显示,地震造成的...

Analysis of Surface Ruptures Caused by the 2010 Ms7.1 Yushu, Qinghai Earthquake Using High Resolution Remote Sensing Images

The MS7.1 Yushu earthquake,Qinghai occurred on 14th April,2010 is related to the activity of the Ganzi-Yushu fault.Yushu earthquake caused surface ruptures and building damages distributed along the Ganzi-Yushu fault.The characteristics of quaternary activities of Ganzi-Yushu fault,such as fault cliff,pull-apart basin and left laterally faulted gullies,are analyzed based on Landsat ETM+ and SPOT images.High resolution aerial photographs acquired after the earthquake revealed that the surface ruptures mainly occurred along the Yushu segment of Ganzi-Yushu fault and the surface ruptures occurred to the north-west of Yushu are characterized by left-lateral and right-step features.Surface ruptures occurred between Yushu to Sangka segment are characterized by widely distributed cracks of mountains.Surface ruptures occurred to the west of Sangka are characterized by thrust features.Collapsed building,damaged aqueduct and mountain landslides are mainly distributed along the fault.Severe building collapse occurred in the west and south part of Yushu city.Results show that the spatial distribution of surface ruptures and earthquake damages is controlled by the fault.