In the recent decades, satellite monitoring techniques have enhanced the discovery of non-catastrophic slope movements triggered by earthquake shaking involving old paleo-landslides with deep-seated sliding surfaces. Understanding the triggering and attenuation mechanisms of such mass movements is crucial to assessing their hazard. In December 2018, Etna volcano (southern Italy) began a very intense eruption, which was accompanied by a seismic swarm with magnitudes reaching 4.9. Synthetic aperture radar data identified local displacements over a hilly area to the west of Paternò village. We evaluated the contribution of seismically induced surface instability to the observed ground displacement by employing a multidisciplinary analysis comprising geological, geotechnical and geomorphological data, together with analytical and dynamic modelling. The results allowed us to identify the geometry and kinematics of a previously unknown paleo-landslide, which was stable before the volcanic eruption. The landslide was triggered by the light-to-moderate seismic shaking produced by the strongest event of the seismic sequence, namely, the December 26, M_w 4.9 earthquake. This observation confirms that seismic shaking has a cumulative effect on landslides that does not necessarily manifest as a failure but could evolve into a catastrophic collapse after several earthquakes.

近几十年来，卫星监测技术加强了对由地震引发的非灾难性斜坡运动的发现，这些运动涉及具有深层滑动面的古老古滑坡。了解此类大规模运动的触发和衰减机制对于评估其危害至关重要。2018 年 12 月，埃特纳火山（意大利南部）开始了非常强烈的喷发，伴随着震级达到 4.9 级的地震群。合成孔径雷达数据确定了 Paternò 村西部丘陵地区的局部位移。我们通过采用包括地质、岩土和地貌数据以及分析和动态建模的多学科分析来评估地震引起的表面不稳定性对观测到的地面位移的贡献。结果使我们能够确定以前未知的古滑坡的几何形状和运动学，该滑坡在火山爆发前是稳定的。滑坡是由地震序列中最强的事件，即 12 月 26 日，M_w 4.9 地震。这一观察结果证实，地震震动对滑坡具有累积效应，这种效应不一定表现为失败，但在多次地震后可能演变成灾难性的坍塌。