Assessment of the effects of Internal and external vibrations on a landslide massif based on microseismic observations

In this study, the seismodynamic state of a landslide massif was assessed through a comparative analysis of the spectral characteristics of natural microseismic background vibrations and train-induced vibrations recorded within the landslide body and in a stable reference area. The H/V spectral ratio analysis revealed a decrease in the dominant frequency and an increase in the vulnerability index within the landslide body compared to the stable area. In addition, an increase in vibration energy was observed predominantly within the frequency range of 1-6 Hz during train passage. The dominant frequency identified within the landslide body (2.09 Hz) falls within this frequency range, indicating a frequency correspondence between the natural dynamic characteristics of the landslide massif and externally induced vibrations.

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