Fig. 4From: Fault extent of the largest aftershock of the 1968 Tokachi-Oki, Japan, earthquake and an interpretation of the normal faulting focal mechanismSum of the squares of residuals, , between observed strong motion durations and calculated ones. The outermost contour in each figure indicates , and the contour interval is 20s2. The stars indicate the points where is the minimum.Back to article page