Correction to: Earth Planets and Space (2021) 73:173 https://doi.org/10.1186/s40623-021-01503-3

Following publication of the original article (Maeda et al. 2021), it was noticed that the epicenter distribution in Fig. 2 was different from the original one which the authors had submitted.

Fig. 2
figure 2

Distributions of the original hypocenters from the JMA unified catalog (blue dots; left panel) and relocated hypocenters (red dots; right panel). Cross-sections of the hypocenter distributions within the rectangles ae are shown to highlight the hypocenter distributions

The correct Fig. 2 has been provided in this Correction.

The original article (Maeda et al. 2021) has been updated.