A total of 36 rock slides were selected for analysing a probable seismic source in the active Andean Precordillera (31°–33°S), the most seismic region of Argentina. Seven of these slope instabilities were selected for in-depth analysis in the field as a function of the most frequent class, lithological susceptibility and field accessibility. Reconstructing the topography previous to collapse and using geotechnical parameters extracted from field data in conjunction with geomechanical testing, the rock slides were modelled using pseudostatic limit equilibrium analyses for the obtention of the critical probabilistic acceleration (\({a}_{c}\)) required to generate the instability under unsaturated conditions and considering both the horizontal and vertical seismic components. To perform a probabilistic estimation of \({a}_{c}\), the parameters in relation to the generalized Hoek–Brown failure criterion were selected to operate statistically using 2D SLIDE 8.0 software. Applying inversely Ground Motion Prediction Equations (GMPEs) and concerning the distance to the studied paleolandslide, a possible earthquake inducing a seismic coefficient (\(k_{h}\)) ≥ \(a_{c}\) was determined. Therefore, a near active fault(s) capable of generating an earthquake magnitude inducing a Peak Ground Acceleration (PGA) ≥ \({a}_{c}\) at the paleolandslide location was designated as the possible seismogenic source of the slope instability. Intersecting these results, potential paleoseismic events which could have caused several slope instabilities were determined. Thus, a new methodology was developed, which allowed to determine the main seismogenic sources capable of inducing the modelled instabilities in each studied subarea in the Precordillera.

总共选择了36个岩石滑坡来分析活跃的安第斯山脉记录台（31°–33°S），阿根廷地震多发地区的可能地震源。根据最常见的类别，岩性敏感性和田间可及性，选择了其中的7个边坡不稳定性进行现场深入分析。重建坍塌之前的地形，并使用从现场数据中提取的岩土参数结合地质力学测试，使用伪静态极限平衡分析对岩石滑坡进行建模，以确保获得临界概率加速度（\（{a} _ {c} \））要求在非饱和条件下产生不稳定性并同时考虑水平和垂直地震分量。为了执行\（{a} _ {c} \）的概率估计，使用2D SLIDE 8.0软件选择与广义Hoek-Brown破坏准则相关的参数以进行统计操作。应用反地面运动预测方程（GMPEs），并考虑到距所研究的古滑坡的距离，确定了可能的地震诱发地震系数（\（k_ {h} \））≥  \（a_ {c} \）。因此，能够产生地震震级并导致峰值地面加速度（PGA）≥ \（{a} _ {c} \）的近乎活动的断层在古滑坡位置，被指定为边坡失稳的可能的震源。与这些结果相交，确定了可能引起几种边坡失稳的潜在古地震事件。因此，开发了一种新的方法，该方法可以确定主要的震源，从而能够在Precordillera的每个研究分区中诱发模拟的不稳定性。