corey.gray@LIGO.ORG - posted 01:24, Tuesday 17 March 2020 - last comment - 02:05, Tuesday 17 March 2020(55641)
8:12utc (1:12amPT) Running Initial Alignment
H1 was having issues at CHECK MICH FRINGES and not locking PRMI.
8:12 Began an Initial Alignment.
1st locking attempt after Initial Alignment had lockloss at ENGAGE ASC FOR FULL IFO (looks like POP18 & PR Gain both drift down before lockloss; see attached screenshot).
NOTE: There was a 5.7 Chilean EQ inbound, but don't really see any reason this was the cause for the lockloss.
On to 2nd lock...