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Fig. 12 | Progress in Earth and Planetary Science

Fig. 12

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

Fig. 12

Temporal variations of seismicity in each area shown in Fig. 11. Blue dots reflect relocated hypocenters, and their vertical axis is relative depth from the plate interface. The red line shows the cumulative number of earthquakes within the relative depth range between − 25 and 25 km. Operation periods for each seismic observation are shown on the upper side of the panel by colored arrows; OBS1,2: ocean bottom observation data from Yamamoto et al. (2017), DONET1, and DONET2. Masked areas of gray, green, and orange reflect the period of incomplete dataset, shallow slow-slip events (SSEs) estimated by Yokota and Ishikawa (2020), and recurrence SSEs (Ariyoshi et al. 2021), respectively. The pink triangle with dotted line reflects the timing of the April 1, 2016, Mw 5.9 earthquake

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