Fig. 8

Coinciding events of repeating earthquakes, earthquake swarms, and slow earthquakes in the southern Japan Trench. a and b Histograms of the occurrence times of repeating earthquakes and earthquake swarm events, respectively, relative to an SSE central date. These repeating earthquakes and earthquake swarm events occurred inside the SSE fault models or within 20 km of the fault models. c Epicenters of the coincident events. The coincident events of earthquake swarms and SSEs are indicated by numbers 1–6 in green, as in Fig. 7b. The coinciding events of earthquake swarms and VLFEs are indicated by numbers 1–9 in yellow, as in Fig. 7b. The VLFEs are from Baba et al. (2020). Note that the VLFEs sometimes have identical epicenters because they were detected using a matched filter technique (Baba et al. 2020). The short-term SSEs are from Nishimura (2021). Tectonic tremors are from Nishikawa et al. (2019) and this study. Repeating earthquakes are based on Uchida and Matsuzawa (2013). The earthquake swarms are from Nishikawa and Ide (2018) and Nishikawa et al. (2019). The VLFEs, SSEs, earthquake swarm events, and repeating earthquakes are colored according to their occurrence time