GNGTS 2022 - Atti del 40° Convegno Nazionale

GNGTS 2022 Sessione 2.2 319 TESTING SITE AMPLIFICATION CURVES IN HYBRID BROADBAND GROUND-MOTION SIMULATIONS OF M6.0, 24 AUGUST 2016 AMATRICE EARTHQUAKE, ITALY M. Pischiutta 1 , A. Akinci 2 , C. Felicetta 3 , F. Pacor 3 , P. Morasca 3 1 Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Italy 2 Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Italy 3 Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano, Italy This research focuses on predicting and assessing earthquake impact due to future scenarios regarding the ground motion seismic hazard by accounting mainly for site effect in the Central Apennines. To this end, we produced synthetic broad-band seismograms by adopting a hybrid simulation technique for the Mw6.0 Amatrice earthquake, Central Italy, on 24 August 2016, accounting for site conditions by means of amplification curves, computed with different approaches. Simulations were validated by comparing with data recorded at 57 strong-motion stations, the majority installed in urban areas. This station sample was selected Fig. 1 - Simulation results and records of Amatrice earthquake at Gubbio (panel A) and Sulmona sedimentary basins (panel B). For each site we add: a rough geological map of the area (provided in the ITACA database); the applied generic and empirical site curves at each station (consistently with Fig. 2); Synthetic velocity Fourier spectra were obtained using the different site curves and recorded velocity Fourier spectra (geometric mean of the two horizontal components).