Fig. 1

2018 northern Osaka earthquake sequence and the regional tectonics; Top panel: map of the major fault systems (Nakata and Imaizumi 2002) and MJMA ≥ 0.5 earthquake locations between June 18 and July 19, 2018 (from JMA unified hypocenter catalog). The green triangle depicts the Kinki Triangle (Huzita 1962); bottom panel: temporal evolution of the local seismicity for period June 16 to July 19, 2018. The green line denotes the normalized cumulative number of local earthquakes of MJMA ≥ 0.5