Fig. 7
From: Shallow structure and late quaternary slip rate of the Osaka Bay fault, western Japan
Seismic profile Line 2 (Airgun). TWT: two-way travel time. Vertical line represents location of cross lines. (a) Uninterpreted image (post-stack, vertical exaggeration = 20). White triangle: representative seafloor multiple. (b) Trace of seismic reflectors in (a) and interpreted image. The seismic units at deeper sections (light to dark pink) are assigned at the base of representative seismic reflectors traceable with other sections. Blue dotted line: anticlinal axial surface. Yellow dotted line: synclinal axial surface. Dip measurements of representative layers are shown. Star shows location of sediment thickness measurement in Fig. 24. The base of Unit A1 is wavy and irregular, indicating an erosional contact (CMP #120–260). Continuous tilting of strata by the hanging wall anticline of the Osaka Bay Fault is observed to reach to shallow depths