青海玉树M_S7.1级地震地表破裂带的遥感影像解译  

Remote Sensing Interpretation of the M_S7.1 Yushu Earthquake Surface Ruptures

作　　者：石峰[1] 何宏林[1] 张英[2,3] 

机构地区：[1]中国地震局地质研究所国家地震活动断层研究中心,北京100029 [2]中国科学院地理科学与资源研究所,北京100101 [3]中国科学院研究生院,北京100049

出　　处：《震灾防御技术》2010年第2期220-227,共8页Technology for Earthquake Disaster Prevention

基　　金：国家自然科学基金资助项目(项目编号40872128和40841019)共同资助

摘　　要：2010年4月14日青海省玉树发生MS7.1级地震,造成严重的人员伤亡和重大的经济损失。除组织现场快速震害评估和地表破裂带调查外,利用高分辨率卫星影像解译是迅速给出初步震害评估和同震地表破裂的位置和展布的最佳途径。本文通过对震前、震后高分辨率SPOT卫星影像的对比,解译出了12km长的同震地表破裂带,其在影像上主要表现为线性阴影和色彩变化。地表破裂带位置和先存的断层、老破裂带位置一致,说明青海玉树地震属于原地复发型地震。同时,解译结果也得到了来自野外实地调查结果的验证,证明了遥感解译的可信性和及时性。但解译破裂长度远小于实际破裂长度,也说明了基于2.5m分辨率的SPOT卫星影像的遥感解译存在较大的局限性。The April 14th,2010 Yushu earthquake（MS7.1） in Qinghai province,led to severe casualties and a huge economic loss.High resolution remote sensing technique is an effective method to estimate the degree of disaster and to distinguish the co-seismic surface ruptures in time.By comparing pre-and post-earthquake SPOT images,we have interpreted a 12km-long co-seismic surface rupture,which is characterized by linear shadow and color shift in satellite images.The interpreted co-seismic surface rupture is consistent with the old rupture and old fault.It implies that Yushu earthquake is of in-situ recurrence feature.Our results are also verified by the field investigation,which suggests that remote sensing technique is a timely method.However,the length of co-seismic surface ruptures in our result is shorter than that from the field survey.This suggests that 2.5m SPOT image-based remote sensing interpretation has some limitations to some degree in determination of earthquake surface ruptures.

关 键 词：玉树地震 遥感解译 地表破裂 

分 类 号：P315[天文地球—地震学] P237[天文地球—固体地球物理学]