Operators name: Yasui, Nakagaki
Shift time: 16-24 (JST)

Summary:

Check Items:

 Vacuum monitor problem
  18:00 Regular checks found that EXC and TMSX vacuum values were not being obtained.(Fig.1)
　=> Kimura-san will check the site on tomorrow's maintenance day.

 CRY,TEMP There was no problem.

16:00 OBSERVING (Just finished the PR3 alignment)
20:03 LOCK LOSS (Corresponding earthquake is unknown)
20:23 OBSERVING (automatically recovered)
24:00 still in OBSERVING