Fig. 1.
From: Potential tsunamigenic faults of the 2011 off the Pacific coast of Tohoku Earthquake
(a) Seismic survey line (yellow line), energy and slip distribution of the 2011 earthquake, and area of tsunami induction. Yellow rectangle indicates the area of panel (b). (b) Bathymetric map around the seismic survey line (red line) (Sasaki, 2004). Reverse triangles indicate the location of a landward margin of the trench. We identify the ridge associated with steeply dipping normal fault and the seafloor slope break associated with branch reverse faults. Red rectangles indicate the areas of panels (c) and (d). (c) Dive track at the seafloor ridge (Dive #1071). Red triangle indicates the location where a dead clam was observed. (d) Dive tracks at the seafloor trace of the branch reverse fault (Dive #1069, #1072, #1073, and #1074). Red triangles indicate the locations of clam colonies.