Fig. 8 Extent of the damage zone of the thrust plane of the YLZP Fault. Considering the divergency of 45° (Fig.1) and a constant 30° dip to the south for the fault (Quidelleur et al.,1997), the five sites (1 to 5) are situated between 0 and 6.8 km from the hanging wall of the YLZP Fault. The exposure and average spacing of joint sets with the distance from fault core, using 2322 joints (Fig. 2) measured by UAV at the five sites, are represented. Cohesion of bedrocks back calculated by means of the Culmann’s approach on the whole slopes (Fig. 4b) and the rockfall density extracted from Fig. 1 along the A-A’ profile vs distance from fault core are represented in the plots.