Lockloss @ 01:17 UTC - link to lockloss tool
Looks like this was some kind of ground motion according to Picket Fence and the 30-100mHz BLRMS, possibly a M5.1 earthquake from the Philippines, but there was no alert from Seismon or a transition to EQ mode. Unsure why we would be so sensitive to ground motion this weak.
H1 is already relocking automatically up to ENGAGE_ASC after going through PRMI.
H1 back to observing as of 02:15 UTC. Fully automated relock.