TITLE: 12/26 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 111Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY:

Busy morning with Calibration measurement + Site Walk Thru, but H1's remained lock the whole shift and locked for ~24.5hrs. 

Microseism is beginning to slowly trend down.
LOG:

• 16:53 Out of OBSERVING
• 16:53 Calibration Sensor measurements run (notified LLO & Virgo).
  • 17:26 Measurements complete & ISC_LOCK back to NLN
• 17:27 Took SEI_DIFF to CORNER_DIFF_CPS or "ON"
• 17:31 EQ Alert:  5.3 from Russia w/ R-wave est of 17:45
• 17:31 Hopped back into OBSERVING to monitor this EQ 
• 18:11 Out of OBSERVING due to Pcal line missing (w/ Jenne on the phone)
  • Jenne walked me through Pcal Y Loop Enable toggle to restart PCal-Y lines.
• 18:14 - 19:45 Site walk through (notified "buddy" & LLO/Virgo operators)
  • 18:15-18:28 In LVEA
  • 18:30-19:02 VPW, EX, & EY
  • 19:02 Back into OBSERVING
  • 19:45 Site Walk-thru complete & back in Control Room (texted "buddy" & notified LLO/Virgo Control Rooms)
• 21:15 PSL Chiller top-off (Corey)