Fig. 4From: Preliminary estimation of high-frequency (4–20 Hz) energy released from the 2016 Kumamoto, Japan, earthquake sequenceThin curves represent 1-h average of the 4- to 20-Hz energy release rate for pre (black)- and post (red)-April 16 periods. The thick lines are regression lines computed by fitting Eq. (2) to the average energy release rates. Two regression lines are fitted for the post-April 16 period using different time durations (red 27 h, blue 10 days)Back to article page