Fig. 8
a Distribution of the hypocenters that were relocated using waveform-derived differential time data. Focal depths are color-coded. The map location is indicated on the inset map. b E–W vertical cross sections of the hypocenters. The focal mechanism solutions of the M ≥ 3 earthquakes that are reported in the JMA catalogue are shown. Profiles are spaced at a 0.01° (~ 1.1 km) interval, and the earthquakes in each profile do not appear in the adjacent profiles