Fig. 8

The results of \(V_p\) modeling of traveltime inversion along line A6. a Average of the 400 starting \(V_p\) models. The inverted triangles on the seafloor show the OBS positions. The yellow line is the average depth of the Moho, and the error bars along the Moho are the standard deviation of the Moho depth. b Standard deviation of the 400 starting \(V_p\) models. c Average of the 400 final \(V_p\) models. d Standard deviation of the 400 final \(V_p\) models. e The representative \(V_p\) model determined by traveltime inversion using the average inversion model in c as the starting model. The area with no ray-path coverage is shaded in gray. f Ray-paths of the wide-angle Moho reflection (PmP) on the representative \(V_p\) model of e. g Recovery of the checkerboard resolution test (CRT). In this CRT, a 5% velocity perturbation was added to the representative \(V_p\) model of e with a pattern size of 30 km in the horizontal direction and 3 km in the vertical direction. h The same \(V_p\) model as e flattened by the depth of the basement (the top of the oceanic crust). The yellow line is the relative Moho depth from the basement, showing the variation in thickness of the oceanic crust along the profile. The red line is plotted as a reference depth of 6.5 km. Note that this figure is vertically exaggerated (2\(\times\)) relative to the other panels