TITLE: 12/14 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 73.359Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY: Recovered well from earthquake except for trouble damping violin mode (See Jeff K.'s alog). Locked for last ~ 3.5 hours.
I silenced the CP4 alarm on the control room alarm handler. The two channels should probably be removed. There were also a couple of dust alarms in the PSL enclosure.
It is not clear if a sweep has been done since maintenance this morning.
LOG:
01:24 UTC Changed sign of gain for PI mode 28.
01:47 UTC EY saturation. Happened to look at CDS overview and saw a number of scattered red squares under end Y that quickly went away.
02:39 UTC (18:39 PST) Lock loss. Earthquake. HAM6 ISI tripped. See attached screenshots for USGS, Terramon and BLRMS info.
04:04 UTC Stopping at DC_READOUT. Waiting for 5.3 magnitude earthquake in Solomon islands to arrive.
04:28 UTC Earthquake did not show up. Moving on.
04:35 UTC NLN. Jeff K. is damping ETMY violin mode at 1009.44 Hz.
04:38 UTC restarted video4.
05:08 UTC Changed sign of gain for PI mode 27
05:14 UTC Observing. Leaving violin mode damping on (Jeff K. accepted SDF differences).
05:17 UTC Changed phase for PI mode 27
05:35 UTC Changed phase for PI mode 27