滑坡震的机制解能够刻画滑坡内部及局部变形、破裂的详细特征，对于理解滑坡孕育化过程以及前兆信号的产生具有重要意义。滑坡上微震事件发生情形有多种，除了滑坡体和基岩的相互作用会产生地震事件，滑坡体的局部坍塌，部分滑坡上滚石的运动都可能产生地震信号。目前的研究多数是分析滑坡震的活动性和滑坡变形的关系，一些关于滑坡震发生机理的研究也是建立在滑坡震的位置与滑坡地质特征的基础上推测得到，不能确切地表明滑坡震的发生机制。为了准确地测定滑坡震机制解，描述其发生机理以及和滑坡变形的关系，本项目将整合一套测定滑坡震机制解的波形拟合方法，该方法可以用来反演双力偶源，全矩张量源以及单力源事件的机制解。本项目拟将该方法用于测定四川省理县西山村滑坡震的机制解，加深对滑坡变形的认识，为评估滑坡灾害的发生提供参考。

The focal mechanisms of slidequakes can describe the detailed characteristics of local and internal deformation of landslides, which is of great significance to understand the evolution processes of landslides and the generation of precursor signals. There are many kinds of microseismic events on landslides, except that the interaction between the landslide and the bedrock will produce seismic events, the local collapse of the landslide and rockfalls on some landslides may excite seismic signals. At present, a lot of researches focus on analyze the relationship between the seismicity of slidequkes and the deformation of landslides. Based on the location of slidequakes and the geological characteristics of respective landslide, some researchers suggest the generation of slidequakes is generally linked to geometric or rheological heterogeneities along the boundaries between the slide material and the bedrock and/or along lateral boundary faults, which cannot accurately show mechanisms of slidequakes. In order to accurately determine the focal mechanism of slidequake, this project will integrate a set of waveform modelling methods for determining the mechanisms of slidequakes, which can be used to obtain the mechanisms of double couple, full moment tensor and single force events. This project plans to use this set of methods to determine focal mechanisms of slidequakes on the Xishancun landslide in Sichuan Province, for understanding the relationship between the occurrence of slidequakes and landslide deformations, and providing reference for assessing the occurrence of landslide disaster.