The study area and the available data set Sample Clauses

The study area and the available data set. The Campania Region has systematically been affected in the last centuries by shallow land- slides of the flow-type occurring in volcaniclastic covers (Xxxxxxx et al. 2008a). These covers derive from air-fall deposition of pyroclastic material originating from Late Quaternary-Holo- cene explosive activity of Xxxxx-Vesuvius and, subordinately, from Campi Flegrei and Roc- camonfina volcanic apparata. The volcaniclastic soils cover three main distinct geoenviron- mental contexts (Xxxxxxxxxx et al. 2004; Xxxxxxx et al. 2005b) over an area of about 3,000 km2 (Fig. 14a). As testified by about 700 events occurred during the last centuries (Xxxxxxx et al. 2008b), shallow landslides of the flow-type frequently involve all the three contexts (Fig. 14a), but the most destructive ones mainly occurred in the southern part of the region (Fig. 14b), where volcaniclastic soils cover limestone bedrock (Xxxxxxxxxx et al. 1999; Xxxxxxxxxx et al. 2004; Xxxxxxx et al. 2008b; Celico and Xxxxxxxx 1998; Xx Xxxxxxxxx and Santo 2005; Xxxxxxxx et al. 2005; Xxxxxxxx and Xxxxxxxxx 2001).