Fig. 9From: Preliminary estimation of high-frequency (4–20 Hz) energy released from the 2016 Kumamoto, Japan, earthquake sequence a Cumulative energy releases (4–20 Hz) by the aftershocks occurring in the pre (black)- and the post (red)-April 16 periods. b Similar plot as a except that they are normalized by the energy releases from the April 14 (2.7 × 1012 J) and the April 16 (2.1 × 1013 J) events, respectivelyBack to article page