Fig. 2

Map view and cross-section of our simulation model. The blue solid rectangle in a is the horizontal coverage of our simulation model for Fig. 7–Fig. 12. The blue dotted rectangle is also the horizontal coverage of the simulation model but for Figure S1 only. Plotted focal mechanisms of Events 1 and 2 were the source models used in this study. The colors in focal spheres of Events 1 and 2 are representing focal depths same as in Fig. 1a. The background color and contour lines represent the bedrock depths of Koketsu et al. (2012). The gray, bold, dashed line in a is the deformation front (Nankai Trough). The cross-section of S-wave velocity structure along the X-X’ profile in a is shown in b. The X-axis is the X direction in a