Abstract The assessment of landslide hazards and design of strategies for managing the related risk have been widely studied topics in the scientific community due to the settlements, infrastructures and tourist and cultural heritage sites that may be threatened by deformations involving unstable slopes. Engineering geological and geophysical techniques have been recently integrated in multidisciplinary approaches to study gravity-induced slope instabilities and monitor their evolution. The slope that hosts the Peschiera Springs drainage plant (Central Italy) is involved in a mass rock creep process associated with deep karst dissolution. Due to the importance of this infrastructure, which provides water to the Rome aqueduct, an accelerometric network was installed in 2008, and a nanoseismic array was added in 2014. In this paper, data recorded by the nanoseismic array were used to locate 397 microseismic events related to the slope instability process, distinguished into two types with different waveforms: 16 failures and 381 collapses. The failures were distributed throughout the slope, while the collapses exhibited two spatially separate clusters below the groundwater level, at a depth where karst processes produce cavities. The clusters were analysed as two distinct microseismic sources characterised by specific frequency-magnitude curves of events that describe their attitude to produce events of different magnitudes. Regarding the accelerometric network, an automated procedure was developed for quickly analysing the seismic records, which include signals from teleseisms and near- to far-field earthquakes that can induce deformation in the landslide-involved slope. The results obtained by the two seismic monitoring systems were integrated with the aim of implementing a landslide hazard matrix based on the statistical frequency of the occurrence of such events and their probability of exceedance during a reference period, providing a useful tool for managing the related landslide risk.

中文翻译：

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Peschiera Springs（意大利中部）排水厂的用于滑坡灾害评估和风险管理的地震监测系统

摘要 由于定居点、基础设施、旅游和文化遗产场所可能受到不稳定斜坡变形的威胁，因此滑坡灾害评估和相关风险管理策略设计已成为科学界广泛研究的主题。工程地质和地球物理技术最近已被整合到多学科方法中，以研究重力引起的边坡不稳定性并监测其演变。Peschiera Springs 排水厂（意大利中部）所在的斜坡参与了与深层岩溶溶解相关的大量岩石蠕变过程。由于这一为罗马渡槽供水的基础设施的重要性，2008 年安装了加速度网络，并于 2014 年添加了纳米地震阵列。在本文中，纳米地震阵列记录的数据用于定位与边坡失稳过程相关的 397 个微地震事件，分为两种不同波形的类型：16 个失败和 381 个坍塌。破坏分布在整个斜坡上，而坍塌在地下水位以下显示出两个空间分离的集群，在岩溶过程产生空洞的深度。这些集群被分析为两个不同的微震源，其特征是事件的特定频率-幅度曲线，这些曲线描述了它们产生不同震级事件的态度。关于加速度网络，开发了一种自动程序来快速分析地震记录，其中包括来自远震和近场到远场地震的信号，这些信号可以引起滑坡斜坡变形。