I checked the relation between the seismic noise around MCF as K1:PEM-SEIS_MCF_Z_BLRMS_3HZ10 and the construction at the bottom Atotsu river with my eyes in real time.

I confirmed that ,

• The biggest seismic noise reaching ~0.06 in  K1:PEM-SEIS_MCF_Z_BLRMS_3HZ10 was caused by the movement of the long (~ 15m) arm of a rough terrain crane.
• The next biggest seismic noise was caused by the ground rock scratching of the metal caterpillar of an excavator car when it went and backed, and/or turned its direction.