Fig. 7From: Structured regularization based velocity structure estimation in local earthquake tomography for the adaptation to velocity discontinuitiesRecovery of the estimated average velocities for different initial velocities: a 4.5 km/s and b 5.0 km/s. c MAE variations arising from the initial velocities for the different estimation methods. Colored lines in a, b are the same as those in Fig. 4Back to article page