Operators name: Yasui, Nakagaki

Shift Time: 16-24

Summary：

Check Items
  => No Probrem

16:00 OBSERVING status

19:04 Lock loss due to Chiba earthquake.

      VIS tripped, so we ran the reset script.(Klog#25393)

      Difference in SDF, T.Yamamoto-san responded.(Klog#25394,25395)

21:28 recovery OBSERVING status