Lockloss @ 03:22 UTC - link to lockloss tool

I originally thought this lockloss was from a M5.4 EQ from Chile that was predicted to hit at this time, but now that the USGS site has updated and looking at how sudden and hard-hitting the lockloss was, I now suspect this was from a M3.2 EQ from Desert Aire, WA, a mere 20 miles northwest of the site.

Since this quake was so close, ground motion calmed down quickly and I've started the relocking process.

Lockloss @ 00:18 UTC - link to lockloss tool

PI mode 24 rung up 90 minutes into the lock stretch and caused this lockloss. I tried manually damping after seeing Guardian be unsuccessful, but I also wasn't able to find a phase which brought this mode down at all before losing lock (I did not get to trying different gains).

TITLE: 09/22 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 136Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: The range has peaked at 164 Mpc in the first 2 locks of the day. 2 locklosses this shift, the range isn't so great this current lock, high freq SQZing looks bad.

LOG:                                                                                                                                                 

• 09:54 UTC lockloss  ~10:00 lock
  • 11:13 UTC Observing
• 15:22 UTC lockloss  4:10 lock
  • I had to adjust PRM and SRM during PRMI and DRMI
  • 16:35 UTC Observing
• 20:53 UTC lockloss from a HAM3 CPS glitch (H2 & V2) 4:21 lock (contacted Jim)
  • 21:05 UTC HAM3 ISI trip, I reset it, it then settled in isolated, then glitched and retripped 7 minutes later
  • alog80232
  • 21:39 UTC The alignment (xarm esp) seemed bad after this so I ran an IA
  • 22:46 UTC Observing

TITLE: 09/22 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 15mph Gusts, 9mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.13 μm/s
QUICK SUMMARY: H1 just got back to observing about 15 minutes ago. High frequency noise looks particularly bad this lock, so once H1 is thermalized I may try some SQZ alignment to improve it.

• Wind slightly elevated, other ground motion low
• All other systems nominal

20:53 UTC lockloss

There were HAM3 CPS glitches on verbal before the LL, and PRM was the first saturating suspension from the LL tool.

Lockloss at 15:22 UTC

Sun Sep 22 08:12:37 2024 INFO: Fill completed in 12min 32secs

TITLE: 09/22 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 8mph Gusts, 5mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.14 μm/s
QUICK SUMMARY:

• We've been locked for 3:15, currently in stand down from a superevent at 14:21UTC
• Low wind, microseism
• NUC33 is frozen again, 12 DCs on the EDC

TITLE: 09/22 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY: Quiet shift after relocking following a PI-caused lockloss.

• 22:58 - Lockloss from PI mode 24
• 23:59 - Started observing; fully automated relock

H1 has now been locked and observing for 5 hours.

LOG:

No log for this shift.

TITLE: 09/21 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: We did not take the calibration measurement as LLO wasn't locked and we weren't fully thermalized either.
LOG:                                                                                                                                                         

• 12:38 UTC lockloss - FSS oscillation tag, 31:50 hour lock! (Tagging PSL)
  • ALS_Y was not locking and was stuck in GREEN arms of IA for 1.5 hours. Things went well after I adjusted ITMY in Yaw
  • 16:11 UTC Observing
  • 17:40 UTC EQ mode from a 5.3 from Alaska
• 19:49 UTC lockloss
  • AS AIR looked very pitched after this LL, ETMX locked at like 10% lower. We couldnt get PRMI, 2x check_mich so I dropped into an IA at 20:20 which started with 30 seconds of EX saturations and EX locking at another 10% lower. The WFS were able to sure it up
  • 21:30 UTC Observing
  • 21:51 UTC PI 24 started to ring up and eventually saturated the DCPCs
• 22:58 UTC lockloss from PI 24

TITLE: 09/21 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 13mph Gusts, 7mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.16 μm/s
QUICK SUMMARY: H1 just lost lock from PI mode 24 ringing up after being locked for 90 minutes. Starting lock acquisition.

• Wind low, microseism still low but slightly elevated compared to a day ago
• All other systems nominal