Earthquakes increase landslide susceptibility in post-seismic periods. The time required for restoring pre-earthquake susceptibility levels is defined as landslide recovery time. Overall, stronger earthquakes are associated with relatively long recovery times in the literature. However, the seismic effect does not explain the whole process. This paper provides insight into factors governing this process. We hypothesize that the dominant post-seismic landsliding process (i.e., new or remobilized landslides), which is governed by the interactions between co-seismic landslide deposits and seismotectonic, morphologic and climatic conditions of a site, is the key to understand the physics behind the landslide recovery time. To test this argument, we analyze 11 earthquake-affected areas associated with seismic variables (i.e., earthquake magnitude and peak ground acceleration) and four environmental factors: (1) the fraction of area affected by co-seismic landslides (FAAL), (2) local relief, (3) average daily precipitation of extreme events (mm/day) and (4) rainfall seasonality. Our findings show that in areas with limited co-seismic landslide deposits (FAAL <~1%) or not enough local relief (<300 m) allowing co-seismic materials to be deposited on hillslopes, then the recovery processes are mostly controlled by new landslides caused by strength reduction of hillslope materials. This mostly results in a relatively quick recovery (<~1 year), which is also correlated with the seasonality of precipitation. The prolonged precipitation makes the recovery process quicken. If the predisposing factors create large co-seismic landslide deposits on hillslopes (FAAL> ~ 1%), then remobilization of material takes the role of the dominant mechanism and recovery may take longer than a year.

地震会增加地震后时期的滑坡敏感性。恢复地震前敏感性水平所需的时间定义为滑坡恢复时间。总的来说，在文献中，较强的地震与相对较长的恢复时间有关。然而，地震效应并不能解释整个过程。本文提供了有关控制此过程的因素的见解。我们假设主要的地震后滑坡过程（即新的或重新活动的滑坡）受同震滑坡沉积物与一个地点的地震构造、形态和气候条件之间的相互作用控制，是理解背后物理学的关键滑坡恢复时间。为了验证这一论点，我们分析了 11 个与地震变量相关的地震影响区（即，地震震级和峰值地面加速度）和四个环境因素：(1) 受同震滑坡 (FAAL) 影响的区域比例，(2) 局部地势，(3) 极端事件的平均日降水量（毫米/天）和(4)降雨季节性。我们的研究结果表明，在同震滑坡沉积有限（FAAL <~1%）或局部地势不足（<300 m）允许同震物质沉积在山坡上的地区，恢复过程主要由新的山坡材料强度降低引起的滑坡。这主要导致相对较快的恢复（<~1 年），这也与降水的季节性相关。长时间的降水使恢复过程加快。如果诱发因素在山坡上产生了大量的同震滑坡沉积物（FAAL>