RyanS noted this morning that the temperature change in the LVEA seems to have caused some alignment shifts to optics in the corner station (first screenshot, from RyanS), and so he had to run an initial alignment this morning. I suspect that, since the temperature change primarily happened while we were locked, the ASC was able to follow along over the last day or so, however when we lost lock (due to the earthquake) and the ASC histories got cleared (as they do at every lockloss), the residual alignments were too poor for lock acquisition. After initial alignment, things seem to be going smoothly.

Out of an abundance of caution, I ran the rubbing checking script, and all the optics in the corner station seem to be fine, and clear of egregious rubbing (I didn't check the ETMs, TMSs, or FC2), and all consistent with the last time the script was run by RyanC in alog 74522.  I think this means that there is no need for Facilities to change the setpoint of the LVEA.  If the system can keep us where we are right now, then this seems to be a fine place to be. 

I'll note that it does look like both RM1 and RM2 have a little bit of fuzz to their spectra between 7-9 Hz.  This fuzz was there in RyanC's checks on the 1st of Dec, but is not there in the reference time from the 20th of Nov.  We don't have vertical control over the RMs, so we can't try moving them to see if that alleviates the fuzz.  Overall we seem to be doing fine, but that fuzz zone may be something to keep an eye on.  While the rubbing script looks at the L, P, Y dofs, I had a look at the individual OSEMs.  The fuzz seems to only show up in Length in the dof view, and that's consistent with my finding that it looks about the same in each individual OSEM (because it's cancelled out in the P and Y dofs).  I attach in the second screenshot one representative individual OSEM to show the fuzz that I'm looking at (green is a reference from 20th Nov 2023, and blue is earlier today when the IFO was down, but the earthquake was mostly done).