利用遥感技术对鲁甸6.5级地震发震断层的判定  

Predication of Seismogenic fault of the Ludian Ms 6.5 Earthquake by Using Remote Sensing Technologies

作　　者：柯乐乐 杨武年[1] 

机构地区：[1]成都理工大学地学空间信息技术国土资源部重点实验室,四川成都610059

出　　处：《地理空间信息》2016年第2期44-46,8,共3页Geospatial Information

基　　金：国家自然科学基金资助项目(41071265;41372340);高等学校博士学科点专项科研基金资助项目(20105122110006)

摘　　要：2014-08-03鲁甸发生6.5级地震,由于其上有北西方向的包谷垴-小河断裂和北东方向的昭通-鲁甸断裂,且震中无明显地表破裂带,故而对发震断层存在一定争议。由往年地震数据分析可知,滑坡分布与发震带在方向上有着一致性,所以选取同一季节时间相近的地震前后的遥感影像,排除季节对植被的影响,分析地震前后的影像中植被覆盖度,间接确定滑坡分布方向。研究表明,植被覆盖度变化主要集中在北西方向,可以判定鲁甸地震的发震断层是北西方向的包谷垴-小河断裂。In August 3, 2014, a magnitude 6.5 earthquake occurred in Ludian County. There is a NW-trending fault named Baogunao-Xiaohe fault and a NEtrending fault named Zhaotong-Ludian fault below the county, and no obvious earthquake ground fission existed, so the seismogenic fault was controversial. From the analysis of the previous seismic data, the landslide distribution was consist with the seismogenic fault. So this paper selected two remote sensing images taken in the same season and a nearly time, but one was before the earthquake, the other was after it. Regardless of the season's inf luence, the paper analyzed the fractional vegetation cover of the two images, and discovered the change of fractional vegetation cover was concentrated in the NW direction. This study can predicate the fault of Ludian earthquake is the NW trending named Baogunao-Xiaohe fault.

关 键 词：鲁甸地震 发震断层 NDVI 植被覆盖度 

分 类 号：P237.9[天文地球—摄影测量与遥感]