[Suzuki, YokozaWashimi]

Today we measured the vibration from the water pipes in the Y-end.

1. We located an ACC (TEAC710) near the portable seismometer (see also klog24323) on the under-floor pipe and on the pipes-frame. 
   On the floor, any significant signal from the water was not found. (Blue in Fig.1)
   On the pipes-frame, vibration from the water was observed (Green in Fig.1)
   In both cases, there was no coherence with the seismometer.
2. We moved the ACC to the floor near the pipes-frame. The vibration from the water disappeared (Pink in Fig.2)
3. We checked the coherence between the ACC on the pipes-frame and the oplevs.  There was no coherence. (Fig. 3)