Alert threshold assessment based on equivalent displacements for the identification of potentially critical landslide events

Abstract Over the past years, growing number of natural hazards all over world has led to an increasing focus on activities aimed at studying and controlling occurrence these phenomena. In this context, monitoring systems have become a fundamental component for Landslide Early Warning Systems, allowing understand evolution processes assess need dedicated mitigation measures. This result is achieved thanks several technological advancements that introduction more accurate reliable sensors, as well automatic procedures data acquisition elaboration. However, despite improvements, interpretation process still challenging task, in particular when it comes identification critical events failure forecasting operations. paper presents methodology developed if potentially event displaying significant deviation from previously sampled data, or could be classified false alarm. The relies definition threshold value based landslide behavior preceding interest. particular, reference derives evaluation equivalent displacements, defined displacements observed time interval equal one showed by event. reports series examples referring different case studies, involving both alarms real collapses, underlining effectiveness proposed model useful tool evaluate with near-real-time approach.