Fig. 5From: Preliminary estimation of high-frequency (4–20 Hz) energy released from the 2016 Kumamoto, Japan, earthquake sequence Black circles represent the correlogram between the 4- and 20-Hz energy release (W obs) and M JMA. The regression lines are obtained by fitting Eq. (3) to the correlogram, where the magnitude ranges used for the fitting are 1.5 ≤ M JMA < 4.5 and 3.0 ≤ M JMA < 6.5 for the red and blue lines, respectivelyBack to article page