TITLE: 04/27 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Commissioning
SHIFT SUMMARY:

- IFO is locked at NLN, but not in Observing Mode due to unreconciled observe SDFs, attached below, so I am leaving it in Commissioning mode - Tagging ISC

- Lock #1:

• LOCKLOSS @ 03:35 - I believe this one is ground motion related - possible aftershock from EQ?

- Lock #2:

• Held in READY to put it values of ISC EX/Y whitening gains to allow IR to catch (alog here) 
• After caputting all values I am still having issues...this time with the LSC_TR_Y PD not getting any light.
• Tried from the beginning - set the values in READY and this time it was LSC_TR_X not catching...
• Rerequested FAST_SEARCH and COMM was able to catch...DIFF failed again...third times the charm
• After multiple attempts at rerequesting and putting in the values, it finally caught...praying we don't lose lock again
• DRMI failed, but let it run through to CHECK MICH FRINGES and back to PRIMI ASC where it caught and moved up
• Acquired NLN @ 05:57

Other Notes:

- 2:14 UTC - inc EQ from South Georgia - 5.8 mag eq

• We did not go to EQ mode, but I guess we didn't need to? Peakmon highest values were only at 80...interesting, quite low for a 5.6
• Also interesting - @ 2:31 UTC we got a SEISMIC to CALM alert, but no indication that it ever transitioned out of CALM to begin with? Tagging SEI

- 3:25 UTC - EX saturation, IFO was a little unstable, seeing ringups in INP1_P_INMON, MICH_Y_INMON, CSOFT_P_OUT, CHARD_Y_OUT, and DHARD_Y_OUT

• Though I'm probably chalking this up to ground motion, all pickets fence seismometers are lighting up and seeing elevated motion in both seismon DMT plots - maybe an aftershock from the previous EQ?

LOG: