ABSTRACT
Forest management in mountainous regions implies frequent sylvicultural interventions on slopes. These human interventions mainly consist of wood felling and can also lead to the opening of forest roads. But in such forested contexts, engines, workers or falling trees can initiate rock falls. Indeed, any block in a previous stable position on the slope (i.e. near the soil surface or even resting on a tree trunk) can be moved and in some cases pushed down the slope. These blocks can vary in weight from one kilogramme to few tons. As a consequence, a site where rocks used not to be a threat for the elements at risk down the slope can temporarily turn to a potentially dangerous site. In addition, in these areas there are no protection structures except the forest stands.
