Followings are memo during this shift.

17:28 Large earthquake. The location is at Ogasawara islands, amplitude is 4 there, Magnitude is 6.9, and depth is 500km. The earthquake monitor in the control room and cameras to monitor mirrors show large vibration. We needed to wait to damp the excitation of VIS.

20:13 Lock. "Observation" start

20:15 Lock-loss

around 20:56 We heard the siren to show discharge water from dams.

20:58 Lock, "Observation" start by 4.2W

21:05 Lock-loss

21:21 Lock, "Observation" start

21:24 Lock-loss

21:48 Lock, "Observation" start by 4.2W. about 330kpc on the monitor in control room
# CARM servo was changed to 7dB and push "accept"

22:14 Lock-loss, 402kp
Since sensitivity was not so good, we tried "PRFPMI_LSC_LOCKED_RF" to do realignment.

23:02 Locked, "Observation" start by 4.2W. about 480kpc.

24:29 We noticed that state of operation didn't change to "Observation" mode but "Locked". The reason is that CARM servo was 6dB and not updated on SDF.

24:33 We accepted "SDF" and moved to "Observation" mode

25:00 Shift was take over to Yamamoto and Yuzurihara.