GNGTS 2017 - 36° Convegno Nazionale

546 GNGTS 2017 S essione 3.1 Fig. 2 - a) Starting velocity model for the local optimization procedure. b) Comparison of four vertical velocity profiles: the red curves represent the velocity profiles related to the starting model; the blue ones represent the velocity profiles related to the final model. c) Observed data for two shot gathers (left) and difference between predicted and observed data before (center) and after (right) the local inversion.