Fig. 4
From: Along-trench structural variation and seismic coupling in the northern Japan subduction zone
P-wave velocity structure and reflector distributions along (a) NS1 and (b) NS2. The reflector distributions were superimposed on the velocity models after applying a spatial filter to extract the local maximum of the traveltime mapping image. Red contours represent the 7.5 km/s velocity contour. Shaded areas indicate areas with no ray coverage in the first arrival tomography. Reflectors indicated by dashed red lines (a, b) are interpreted as the forearc Moho, and the reflector indicated by the dashed green line (b) is interpreted as the plate interface.