GNGTS 2013 - Atti del 32° Convegno Nazionale

The NW-SE trending Mount Morrone fault is one of these silent faults, affecting with its two splays the hillslope facing the intermontane Sulmona Plain (Fig. 1). Here Vittori et al. (1995) reported the displacement of Late Pleistocene alluvial fan sediments along the western fault splay, while Galadini and Galli (2000) showed the offset of Late Pleistocene slope deposits along the eastern splay, providing also an overall, long-term (1 Ma), vertical slip-rate of 0.5-0.66 mm/yr. Recently, Gori et al. (2010, 2011) published new robust evidence of Late Pleistocene fault activity which was also accompanied by large scale gravity deformations. Fig. 1 – DEM of the Sulmona Plain. Red lines are the western basal splay, and the upper eastern (right inset) splay of the Mount Morrone fault system. In blue the trace of the trenches of the main, NE-dipping, deep seated gravity slides affecting the whole fault-slope. Collapsing columns indicate the site with archaeoseismic evidence for a 2 nd century AD earthquakes (mod. from Galadini and Galli, 2001). Upper inset, aerial view looking east of the rock- fault scarp along the eastern fault splay. 54 GNGTS 2013 S essione 1.1