  We show that it is possible to capture the oscillatory ground motion induced
by the Tohoku-Oki event for periods ranging from 3 to 100s using Precise Point
Positioning (PPP). We find that the ground motions of the sedimentary basins of
Japan were large (respectively > 0.15m/s and >0.15m/s2 for velocity and
acceleration) even for periods larger than 3s. We compare geodetic observables
with a Ground Motion Prediction Equation (GMPE) designed for Japan seismicity
and find that the Spectral Acceleration (SA) is well estimated for periods
larger than 3s and distances ranging from 100 to 500km. At last, through the
analysis of the displacement attenuation plots, we show that the 2011
Tohoku-Oki event is likely composed of multiple rupture patches as suggested
before by time-reversal inversions of seismic data.
