*4.1. Geomorphological Approach*

The following numerical analysis was carried out along 10 geotechnical cross-sections: Six are located on the eastern and southeastern sides of the relief of Mount Falcone and four on the western side (Figure 4a). The choice of the location took into account the different morphological–structural conditions of the relief and the results of the geomorphological surveys carried out in the field. To verify all the possible situations observed in the field, the sections were traced to include both portions of the slope affected by gravitational movements and others considered stable.

The geomorphological processes observed along the individual cross-sections can be summarized as follows.



A gravitational movement of greatest scientific and technical interest, given the elevated level of risk connected to the presence of the historical centers mentioned in the previous chapter, is present corresponding to the relief of Mount Falcone (Figure 4). This phenomenon, already studied in the past and verified by numerical modeling both in static and dynamic (seismic) conditions [34,35,58], has been classified as lateral spread and affects, with different intensity, the whole "plate" at the top of the relief. Taking into account the objectives of the present work (mainly addressing the study of medium-to-low depth processes), it was not included in the analysis.
