It is difficult only with this figure. Both in acceleration and velocity you can see a significant and energetic pulse in the FN component with a clear period. In the spectrum, this period must appears clearly. After a better filtering, you must also observe this pulse in the displacement.

Moreover, in the velocity hodogram you can see a clear directivity of the ground movement. It must be also observed in the acceleration and displacement hodograms, after to consider only the S phase and, as I told you, modify the filter parameters.