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Fig. 7 | Progress in Earth and Planetary Science

Fig. 7

From: A review on slow earthquakes in the Japan Trench

Fig. 7

Activity of repeating earthquakes and earthquake swarms along the Japan Trench before the 2011 Tohoku-Oki earthquake. a Epicenters of the repeating earthquakes and earthquake swarm events. b Spatiotemporal distribution of the repeating earthquakes and earthquake swarm events before the March 2011 Tohoku-Oki earthquake. Coincident events of SSEs and earthquake swarms are indicated by numbers 1–6 encircled in green. Coincident events of VLFEs and earthquake swarms are indicated by numbers 1–9 encircled in yellow. For an explanation of the other symbols, refer to the legend in the figure. The epicenter of the Tohoku-Oki earthquake and its largest foreshock are from the JMA catalog. The coseismic slip of the Tohoku-Oki earthquake (10 m or larger) is based on Iinuma et al. (2012). The VLFEs are from Baba et al. (2020). The short-term SSEs are from Ito et al. (2013) and Nishimura (2021). The repeating earthquakes are from Uchida and Matsuzawa (2013). The earthquake swarms (Mj ≥ 3) are from Nishikawa and Ide (2018) and Nishikawa et al. (2019). The foreshock-prone areas are based on Maeda and Hirose (2016) and Hirose et al. (2021). The 3 years periodic slow slip in the northern Japan Trench is from Uchida et al. (2016)

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