Figure F14. A. Stereographic plot of poles to fracture planes (equal-area lower-hemisphere projection). B.Rose diagram of azimuths of poles to fracture planes, with bounding circle representing 12% of data points. Black square represents the direction of plate convergence at the Nankai Trough (average of 313°; Seno et al., 1993). Fractures indicate a dominant northeast-southwest trend (with poles at 90° to this trend) with a slight difference between the average trend of poles and the convergence vector.

Figure F14. A. Stereographic plot of poles to fracture planes (equal-area lower-hemisphere projection). B. Rose diagram of azimuths of poles to fracture planes, with bounding circle representing 12% of data points. Black square represents the direction of plate convergence at the Nankai Trough (average of 313°; Seno et al., 1993). Fractures indicate a dominant northeast-southwest trend (with poles at 90° to this trend) with a slight difference between the average trend of poles and the convergence vector.