Fig. 6

Interpretation of the seismic section extracted from 3-D seismic data along the Nankai Trough–Kumano transect from Moore et al. (2009). Colored units (gray, brown, green, and blue) represent each interpreted BTH collisional unit. The location of a very-low-frequency earthquake (VLFE) cluster is marked according to Shiraishi et al. (2020). The original locations of the VLFEs were determined by Nakano et al. (2018)