TITLE: 05/27 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY: Currently still Observing and have been Locked for 9 hours now. Very quiet evening. The PSL chiller water level alarm was going off so I went in and added 150 mL to it (tagging PSL).

We had some small earthquakes roll through, but they were all small enough that we didn't have to go into earthquake mode. Between 4 and 5 UTC, we had a 17-20 Mpc drop in range; I am attributing it to one of the small earthquakes, but I'm confused as to why the 'peak' lowest range that we had during that time occures 30 minutes after the ground motion peaked (attachment1). Omicron also caught a bunch of low SNR glitches between 20 and 60 Hz during that time(attachment2).
 

LOG:

23:00 Relocking

23:06 NOMINAL_LOW_NOISE
23:13 Observing
    - DIAG_MAIN 'Check PSL Chiller' message - I put 150 mL in