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Figure F1. Bathymetric map, Nankai Trough off southwestern Japan is the locus of subduction of the Philippine Sea plate (PSP) beneath Honshu and Shikoku islands. Yellow arrows = estimated far-field vectors between the Philippine Sea plate and Japan (Seno et al. 1993; Heki, 2007). Rupture zones of last two large subduction earthquakes (1944 and 1946) are also shown. Stars = epicenter locations for earthquake nucleation. Red dashed line = Expedition 322 drilling area shown in Figure F2. Inset shows location of Nankai Trough. Previous transects of Nankai Trough were positioned off Ashizuri and Muroto peninsulas of Shikoku. EP = Eurasian plate, PP = Pacific plate, NAP = North American plate.

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