Fig. 3

Temporal changes in T-axis azimuths. a T-axis azimuths projected on the vertical cross section along the fault for October 22–29 in the eastern side of the fault. b Those for aftershocks from October 30–December 15 in the eastern side of the fault. c Those for aftershocks in the former period in the western side of the fault. d Those for aftershocks in the latter period in the western side of the fault. e Those projected on the horizontal plane for aftershocks in the former period at depths of 0–5 km. f Those for aftershocks in the latter period at depths of 0–5 km. T-axis azimuths from 90° (East) through 180° (South) to 270° (West) are represented by solid colors that change from dark blue to green to brown. Rectangles show the mainshock fault estimated from InSAR and GNSS data assuming uniform slip (GSI 2017)