GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 1.1 GNGTS 2023 resolution an area of about four hectares, with a total of 18 NNE-SSW, profiles, and 789 geophone positions and a total number of 1,115 vibrating points acquired with a high-resolution vibratory source. The preliminary results will consist of a 3-D tomography illuminating the first 50 m of the investigated area and a preliminary stack. Trace editing, in particular first arrival picking, is particularly challenging, due to the larger numbers of waveforms to be picked (more than 550,000) and the use of a vibratory source which generates artificial events before the first arrivals. To facilitate the picking, we use and discuss the advantages and the limits of a machine learning algorithm (i.e., neural networks) for automatic event picking. References Bruno, PP.; Castiello, A.; Improta, L; [2010] Ultrashallow seismic imaging of the causative fault of the 1980, M6.9, South Italy earthquake by pre‐stack depth migration of dense wide‐aperture data, GRL 37; Pantosti, D.; Valensise, G.; [1990] Faulting Mechanism and Complexity of the November 23, 1980, Campania-Lucania Earthquake, Inferred From Surface Observations, JGR, 95, 319-341; Pantosti, D., Schwartz, D. P. and Valensise, G.: [1993] Paleoseismology along the 1980 surface rupture of the Irpinia fault: Implications for earthquake recurrence in the Southern Apennines, Italy, JGR 98, 6561–6577.