Fig. 8
Vertical cross sections of the velocity structure model developed in this study. The locations of the profiles are displayed on the map in Fig. 5. The black line represents the ground surface, and the black stars indicate the locations of control points on the ground surface. Each color line represents the bottom depth of each velocity layer in our estimated three-dimensional velocity model, and each color star indicates the bottom depth of each velocity layer of input data given at each control point (dark blue: VS = 0.6 km/s, sky blue: VS = 1.1 km/s, orange: VS = 1.4 km/s, green: VS = 1.7 km/s). The number corresponds to the S-wave velocity of each layer. The small dots are placed at every 1 km along the profile line as a kind of tick mark