The 2015 M_w 7.8 Gorkha earthquake in Nepal and the M_w 7.3 aftershock triggered at least 22,914 landslides that each had areas ≥500 m² and lengths and widths ≥20 m. Amongst these landslides, 2,059 had areas >10,000 m². Analyses of the landslide geometry, using length (L), width (W), height (H, from the crown to toe), reach angle (arctan value of H/L), and aspect ratio (L/W), show that most of the landslides have aspect ratios of 1.6–3.6 and reach angles of 35–45°. The fitting relationship between H and L is H = 0.87L − 11.11. The steep topography is likely the main factor that controls the landslide runout and planar shape. The landslides are divided into 3 geomorphometric categories using the aspect ratio: LS1 (L/W ≤ 2); LS2 (2 < L/W ≤ 4); and LS3 (L/W > 4). Statistical analyses of these categories with the control factors show that the landslide distribution does not relate to the three large-scale geologic faults that traverse the region, roads, accumulative precipitation before the earthquakes, and the small earthquakes that occurred during the 2012–2015 pre-monsoons in the study area. The 3 landslide categories are sensitive to similar conditions related to curvature, slope position, lithology, and peak ground acceleration. In contrast, the effects of elevation, slope angle, slope aspect, and streams on landslide distribution differ. Moreover, massive landslides (with areas >10,000 m²) are more likely to occur on the steeper hill slopes that in the higher elevation settings, which provide more substantial gravitational potential energy and long-runout space. As landslides with different geomorphometric shapes have various susceptible conditions, examining the landslide distribution based on their geometric characteristics provides a new way to study the landslide extent and mechanism.

2015年 中号_w 7.8尼泊尔及 中号_w7.3余震引发了至少22,914个滑坡，每个滑坡的面积≥500m ²，长度和宽度≥20m。在这些滑坡中，有2,059处面积> 10,000 m ²。使用长度（L），宽度（W），高度（H，从顶部到脚趾），到达角度（H / L的弧度值）和长宽比（L / W）对滑坡的几何形状进行分析，结果表明：大多数滑坡的纵横比为1.6–3.6，到达角度为35–45°。H和L之间的拟合关系为H = 0.87L-11.11。陡峭的地形可能是控制滑坡跳动和平面形状的主要因素。使用长宽比将滑坡分为3个地貌类别：LS1（L / W≤2）；LS2（2 <L / W≤4）; 和LS3（L / W> 4）。对具有控制因素的这些类别的统计分析表明，滑坡的分布与地震发生前横穿该地区，道路，累积降水的三个大型地质断层无关，以及研究区域2012-2015年季风前发生的小地震。3个滑坡类别对与曲率，斜坡位置，岩性和峰值地面加速度有关的相似条件敏感。相反，仰角，坡度角，坡度和溪流对滑坡分布的影响是不同的。此外，大规模滑坡（面积> 10,000 m²）更可能发生在高海拔环境中的更陡峭的山坡上，这提供了更大的重力势能和较长的跳动空间。由于具有不同地貌形状的滑坡具有各种敏感条件，因此根据滑坡的几何特征检查滑坡的分布情况为研究滑坡的范围和机理提供了新的途径。