(RyanC, CoreyG)
Got a Wake Up Call at 1211amPDT, but I was sort of already awake. RyanC was up after his shift and we were both watching H1 remotely. He was battling H1 most of his shift and made headway toward the end of his shift and then handed off info for how things were going (the winds started dying down around 9pm-ish). A few things he did for H1:
- He was concerned with the ETMy Roll Mode. He ultimately found a typo in ISC lock for the gain. He fixed that.
- ITMx Mode 13 was ringing up. Ryan found a new setting to damp this down & it should be used for next lock.
- For the first time since RyanS's lockloss at the end of his shift, RyanC was able to get H1 back to NLN, but it was too noisy for OMC Whitening to kick in, so we had to wait a while for that to quiet down. It eventually did, and we were officially at NLN, but we had some SDF diffs.
- SDF Diffs are attached. I bounced my questions for these SDFs off of RyanC.
- For the ETMy Roll, basically did a REVERT to get the gain of 40 (corrected after RyanC found typo)
- Found the same diffs for IMC MCL threshholds I had last night, so this time, instead of Reverted, I Accepted. (I thought RyanS was going to do this, or maybe I am too tired to follow this! Ha)
- ITMx MOD13 had a phase Diff for FM2, but it was also "not monitored". I wanted to accept these settings that RyanC found which damped it down, so I ACCEPTED it.
- 0724 Then H1 automatically went to OBSERVING!! ....for about 75seconds!!!
- 0725 LOCKLOSS due to most likely a M5.0 earthquake off the Chilean coast.
- Locking
- DRMI flashes were bad. PRMI was not locking (after check mich fringes), so went for an alignment:
- 0754-817utc Manual Initial Alignment Run, and for the most part tweaked up alignment similar to what I did back on Jun1st (alog84695)---PRM moved mainly in Yaw. SRC was misaligned, so SR2 was moved a bit in both P & Y. And then SRM was tweaked also in both P& Y to optimize AS_A_DC.
- Currently at DRMICamera flashes look centered and have flashes at/above 100counts. May head to bed and hope for automation to take over.
- DRMI flashes were bad. PRMI was not locking (after check mich fringes), so went for an alignment:
Now that I'm sort of awake, wondering why the Earth was playing with us and that Earthquake which literalluy caught us by surprise seconds after we made it to Observing last night.
Although there were some Alaska quakes around the time of the lockloss, they were under Mag2.6.
So assuming it was the Mag5.0 off the coast of Chile which was roughly about 30min before the lockloss. I guess that's fine, but why were there no notifications on Verbal of an Earthquake? Why didn't SEI_ENV transition from CALM to EARTHQUAKE?
Looking at the seismic BLRMS, the last time SEI_ENV transitioned to EARTHQUAKE was about 12hrs ago at 0352utc (see attached screenshot) during RyanC's shift (but he was just getting done dealing with winds at that time, so H1 was down anyway). But after that EQ, there were a few more earthquakes, which were less that the 0352 one, but not by much, and certainly big enough to knock H1 out at 0725 from the Chilean coast earthquake. Perhaps it was a unique EQ, because it was off the Pacific coast, albeit South American coast.
Just seems like H1 should have been able to handle this pesky measly Mag5.0 EQ that the Earth taunted us with after a rough night---literally seconds after we had hit the OBSERVING button! :-/