[Yuzurihara, Yamamura]
This is related to klog #25258.
We found that the ground motion(Fig.1) due to the excavators(around 10 Hz) had affected strain (around 100 Hz), causing non-Gaussianity(Fig.2) and excesses on spectrogram(Fig.3) to appear.
When we focus on the noise at 6/7 6:00~7:00 UTC, the inspiral range decreased by about 9% after the noise appeared.
For the detail plots, see wiki.