Fig. 7

3-D pore fluid pressure field before the Kumamoto earthquake sequence. Pore fluid pressure fields at depths of (a) 5 km, (b) 10 km, and (c) 15 km. The excess pore fluid pressure above hydrostatic is shown with overpressure coefficient C (see text). The red lines show contour lines for C = 0.13. The stars, the black dashed lines, and triangles are the same as in Fig. 2. The white lines denote active faults. The grey rectangles show the main rupture zone of the mainshock