GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 3.2 ___ GNGTS 2023 gravel liquefaction case history database (137 sites related to 17 earthquakes in seven countries within different geological environments and magnitudes). Liquefaction assessment at the Santa Rufina test site The VS – based method was applied to the Santa Rufina (Sulmona, Central Italy) test site, where nine SPTs, two DPTs and a down-hole (DH) were performed. To better constrain the analysis, 13 disturbed soil samples were also collected (Salvatore et al., 2022). The Sulmona basin (Fig. 2) is an intermountain tectonic depression caused by the Quaternary activity of a normal fault system affecting the western slope of Mt. Morrone (Miccadei et al., 1998; Galli et al., 2015). Based on an empirical relationship, the seismogenic potential attributed to this source has been estimated to be 6.5-6.7 (e.g., Pizzi et al., 2002), with a recurrence time of 2.4 ± 0.2 ka (Galli et al., 2015). According to Miccadei et al. (1998) the Sulmona basin is mainly filled by lacustrine deposits and subordinately alluvial and slope deposits dating back to the Lower Pleistocene, although the entire sequence of the Quaternary filling has never been observed in either an outcrop or in a borehole to define its thickness.