Earthquake-triggered landslides (EQTLs) are affected by both seismogenic faults and topography. Using landslide data associated with the 2008 M_W7.9 Wenchuan earthquake, the distribution characteristics of EQTLs were identified. And the influence of topographical changes and fault dip angle changes on the distribution of EQTLs was analyzed. Fault dip angle had a controlling impact on EQTL spatial distribution. When the dip angle increased, EQTL distribution was concentrated in a certain range on both sides of the fault and decayed rapidly with distance from the fault. When dip angle decreased, the hanging wall effect became more obvious, and the number of landslides on the hanging wall gradually decreased with distance from the fault. In terms of topography, EQTLs were closely related to relative elevation differences, forming a single peak for a local relief range of 400–1600 m. For > 70% of statistical units, EQTL density increased with local relief; the landslide distribution conformed to an exponential relationship with relief. Peak local relief and dominant local relief were highly negatively correlated with fault dip angle. Fault geometry and motion characteristics control the propagation of seismic waves, directly affecting the distribution of EQTLs; moreover, as tectonic activity controls local relief, it also indirectly affects the distribution of EQTLs. Our findings provide empirical evidence for the rapid assessment of EQTL distributions.

地震引发的滑坡 (EQTL) 受地震断层和地形的影响。使用与 2008 MW 相关的滑坡_数据7.9汶川地震，确定了EQTLs的分布特征。并分析了地形变化和断层倾角变化对EQTLs分布的影响。断层倾角对EQTL空间分布有控制作用。当倾角增大时，EQTL分布集中在断层两侧一定范围内，并随离断层距离的增加而迅速衰减。当倾角减小时，上盘效应更加明显，随着离断层的远近，上盘滑坡数量逐渐减少。在地形方面，EQTLs与相对高差密切相关，在400~1600 m的局部起伏范围内形成单峰。对于 > 70% 的统计单位，EQTL 密度随着局部缓解而增加；滑坡分布与地势呈指数关系。峰值局部起伏和主导局部起伏与断层倾角高度负相关。断层几何形状和运动特征控制地震波的传播，直接影响EQTLs的分布；此外，由于构造活动控制了局部地势，也间接影响了EQTLs的分布。我们的研究结果为快速评估 EQTL 分布提供了经验证据。它还会间接影响 EQTL 的分布。我们的研究结果为快速评估 EQTL 分布提供了经验证据。它还会间接影响 EQTL 的分布。我们的研究结果为快速评估 EQTL 分布提供了经验证据。