Comment to Seismic and Acoustic measurement at TAMA FC (Click here to view original report: 2989)

I monitored the seismic level at TAMA this weekend.


Below 1Hz, microseismic band, the ASD is large on Saturday night. It is consistent with the ocean wave.
At around 3Hz, the ASD is large on Saturday night and Monday morning, and small on Sunday.
Between 10 Hz and 20Hz, the ASD is large on Monday Morning.
Around 30 Hz, sometimes strange bumps are observed.