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Progress in Earth and Planetary Science
Fig. 1 | Progress in Earth and Planetary Science

Fig. 1

From: Seismicity distribution in the Tonankai and Nankai seismogenic zones and its spatiotemporal relationship with interplate coupling and slow earthquakes

Fig. 1

Maps of the study area. The inset regional map shows the location of the study area with the megathrust seismogenic segments (Tokai, Tonankai, and Nankai) of the Nankai Trough in southwestern Japan with plate boundaries. Two letter abbreviations reflect the name of the Plate; AM: Amur Plate, PS: Philippine Sea Plate, OK: Okhotsk Plate, and ON: Okinawa Plate (Bird 2003). Yellow allows are the relative motion of the PS with AM (Argus et al. 2011). In the main topographic map, the megathrust seismogenic zones along the Nankai subduction zone are shown by the red line. The Shionomisaki igneous complex (SIC; Kodaira et al. 2006), subducted seamount identified off Cape Muroto (SSM; Yamamoto et al. 2017), and subducted Paleo-Zenith Ridge (PZR; Park et al. 2004) are outlined in black. Blue diamonds show the location of the seismic stations of the Dense Oceanfloor Network system for Earthquakes and Tsunamis (DONET). The epicenters of the 1944 Tonankai and 1946 Nankai earthquakes were taken from Kanamori (1972) (yellow stars), and two M > 7 earthquakes of the Kii Peninsula occurring on September 5, 2004 (red stars) and the MJMA 6.5 off-Mie earthquake occurring on April 1, 2016 (orange star) are from the JMA unified catalog

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