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Seismic and Electrical Investigations of the San Vito Romano Landslide: Preliminary Analysis in a Multi-Hazard Framework
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, NSG 2025: 1st Conference on Geohazards Assessment and Risk Mitigation Conference, Sep 2025, Volume 2025, p.1 - 5
Abstract
Summary
This study presents a geophysical investigation of the San Vito Romano landslide, an active, retrogressive movement affecting a village located approximately 57 km from Rome.
The landslide is a rototranslational mechanism involving flysch deposits of the Frosinone Formation (Upper Tortonian). Several preliminary geophysical surveys were conducted, including passive seismic measurements (H/V spectral ratios from ambient noise), Electrical Resistivity Tomography (ERT), Multichannel Analysis of Surface Waves (MASW), and Seismic Refraction Tomography (SRT). These techniques provided valuable information on the subsurface structure and mechanical behavior of the landslide body. A seismic monitoring network with four seismometric stations (2.5 Hz eigenfrequency) was deployed to track resonance frequency variations over time and correlate them with rainfall data from a local weather station. Seismic events from the INGV database were selected based on proximity (within 100 km) and magnitude (above M2), and Spectral Standard Ratios (SSR) were calculated to evaluate local seismic amplification. The study also applies the characteristic periods-based (CPB) approach, analyzing Ts/Tm and Tl/Tm ratios to assess potential resonance conditions and estimate maximum seismic displacements. This geophysical approach contributes to understanding slope–seismic wave interactions and improves hazard assessment in landslide-prone areas.
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