Figure F2. Coseismic displacement of the 2011 Tohoku earthquake extended all the way to the trench axis (Fujiwara et al., 2011). A. Bathymetric data along Line TH03. B. Difference between the bathymetric data acquired before (1999) and after (2011) the earthquake. C. Time-migrated multichannel seismic (MCS) section along Line TH03. Comparing B and C suggests that coseismic fault slip reached to the trench axis along the top of the basaltic layer (or an interface slightly above it) because the top of the basaltic layer and an interface slightly above it are the only visible interfaces in the MCS section (see Fig. F3).
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