(specifics in Summary Alog draft)
An hour into the shift (803utc), H1 lost lock due to a M6.0 Earthquake from Tonga (made it through S&P waves, but the R3.5 wave did us in).
Needed to wait atleast an hour to have the Green Y-Arm be stable enough to engage ASC after the seismic noise dissipated.
Really waivered on whether to run an Initial Alignment, but decided NOT to since DRMI flashes didn't look bad. But it did take a couple of attempts to get DRMI locked (definitely needing CHECK MICH FRINGES, PRMI, & helpful tweaks to the PRM & SRM were needed). After this, have made it through DRMI w/o intervention.
60W Locking Data Points
With only a handful of Locking Data Points for H1 in the new 60W Configuration from this week---due to the LONG locks, wanted to add more data points. Last night's long lock (2) issues at LASER NOISE SUPPRESSION (ISS 2nd Loop changes apparently helped). For Austin's locking post-CDS-crash, he also lost lock at LASER NOISE SUPPRESSION, but also at earlier states such as TRANSITION FROM ETMX. My first post-EQ lockloss was also at TRANSITION FROM ETMX. :(
I'm currently going very slowly from state-to-state with ISC_LOCK from MAX POWER on up, and keeping an eye on anything peculiar. Currently holding at DAMP VIOLINS FULL POWER (as Austin did) to wait for violin settings to be engaged.
Well, that was uneventful. :)
Took baby steps for the latter steps of ISC_LOCK with fears of another late-stage lockloss, but there were no issues!
And once at Nominal Low Noise, only had to wait a few seconds until I could take it to OBSERVING (@1121). So I have taken OBSERVATORY MODE from EARTHQUAKE to OBSERVING; where we were in EARTHQUAKE from roughly 803-1121utc.