The results when we imposed an additional condition that the slip in the Miyagi-oki region is constrained to be zero, and the comparison of the residuals between the optimum and the constrained models. (a) Coseismic slip distribution is presented as in Fig. 1(a). The distributions of the residuals of the horizontal components ((b) and (c)) and of vertical displacements ((d) and (e)) around the Miyagi-oki region are displayed. The residuals are calculated by subtracting the calculated displacement from the observed displacement for each site. The results based on the optimum model are shown in (b) and (d). (c) and (e) represent the results based on the constrained model.