Fig. 3

Uninterpreted (b) and interpreted (b) SW-NE airgun reflection seismic profile (the geological units have been interpreted by Fabbri et al., 2017) (for position of profile see Fig. 1a). The numbers in a refer to the seismic facies described in the text. The inherited positive relief is interpreted as the rocky blocks seen in the bathymetry (Figs. 1 and 2). The facies marked in green represents the interpreted volume affected by the event. The lower, more transparent facies is interpreted as the deformed basin plain sediments due to the impact of the rock mass while the upper chaotic facies with high-amplitude discontinuous reflections is interpreted as the failed rock mass