Fig. 1
From: Weakening behavior of the shallow megasplay fault in the Nankai subduction zone
Nankai Trough bathymetry and seismic cross section. A Bathymetric map (Olson et al. 2016) of the Nankai Trough area indicating drilling Site C0004 and the seismic cross section (red dashed line) shown in B. Megathrust earthquakes from the last century are shown as red stars. PSP: Philippine Sea Plate; PP: Pacific Plate; OK: Okhotsk Plate; Am: Amurian Plate. B The seismic cross section after Moore et al. (2009), showing the extent of coseismic slip of the Tonankai megathrust earthquake (1Kikuchi et al. (2003) and 2Tanioka and Satake (2001)) as well as slow slip areas (3Araki et al. (2017)) and very low frequency earthquakes (VLF) (4Sugioka et al. (2012))