The slip distribution of the 11 March 2011 Tohoku earthquake is inferred from tsunami waveforms, GPS
data, and seafloor crustal deformation data. The major slip region extends all the way to the trench, and
the large slip area extends 300 km long and 160 km wide. The largest slip of 44 m is located up-dip of
the hypocenter. The large slip amount, about 41 m, ruptured the plate interface near the trench. The
seismic moment calculated from the estimated slip distribution is 5.5 1022 N m (Mw 9.1). The large
tsunami due to the 2011 Tohoku earthquake is generated from those large slip areas near the trench.
The additional uplift at the sedimentary wedge as suggested for the 1896 Sanriku earthquake may have
occurred during the 2011 Tohoku earthquake, too.