中文摘要：

2014年8月3日云南鲁甸发生MS6.5地震,10月7日云南景谷发生MS6.6地震。这2次地震的震级、地震类型、震源深度等相差不大,但地震所造成的人员伤亡、房屋建筑损毁程度、地震地质灾害等却相差很大。在地震现场调查资料的基础上,对比分析地震造成的崩塌、滑坡、地裂缝、砂土液化、房屋建筑损毁等灾害轻重差别的主要原因。研究表明,鲁甸地震灾区地质构造复杂,地层破碎,人口密度大,房屋建筑抗震性能差;而景谷地震灾区地质环境较好,植被茂密,人口密度低,相比同量级地震的加速度小,房屋建筑结构抗震性能较好。总体而言,鲁甸MS6.5地震的震害比景谷MS6.6地震要严重得多。

英文摘要：

The Ludian MS6.5and Jinggu MS6.6earthquakes occurred on August 3,2014 and October 7,2014,respectively,in Yunnan Province.The magnitude,type,and focal depth of these two earthquakes are similar;however,the number of casualties,degree of damage to buildings,and geological disaster induced by them are significantly different.As of August 3,2014,617 people have been reported killed and 112 and 3 143 people have been reported missing and injured,respectively,in the Ludian MS6.5earthquake.However,as of October 7,2014,only 1person was reported to have been killed,while 8and 316 people were reported to have been severely and slightly injured,respectively,in the Jinggu MS6.6earthquake.On the basis of field survey and extensive investigation of numerous diverse earthquake disasters induced by the two earthquakes,the primary reasons for the difference in seismic damage are summarized by comparing the collapse,landslide,ground fissures and deformation,sand liquefaction,and building damage caused by the two earthquakes.The area ofⅦandⅥare similar in the intensity maps of Ludian MS6.5and Jinggu MS6.6earthquakes;however,the area ofⅧ and Ⅸin the Ludian MS6.5earthquake is almost equal to that ofⅧin the Jinggu MS6.6earthquake.A comparison of the results shows that the Ludian earthquake affected area is a complex geological structure with broken strata,dense populations,and poor anti-seismic capacity.However,the Jinggu earthquake affected area is located in a good geographic environment with thick vegetation,low population density,small peak ground acceleration among same level of earthquakes,and good anti-seismic capacity.In summary,the seismic damage induced by the Ludian MS6.5earthquake is more serious than that induced by the Jinggu MS6.6earthquake.