Fig. 8

Distribution of b-values before and during the 2016 Kumamoto earthquake sequence (depth range 0–50 km). a January 1, 2006, to April 13, 2016 (before the earthquake), from the JMA unified catalog. Automatically processed hypocenters (PF method) are shown for b April 14–15, 2016 (including M 6.5 and M 6.4 foreshocks), c April 16–17, 2016 (including M 7.3 mainshock), and d April 18 to May 16, 2016