TITLE: 09/05 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY:

IFO is LOCKING at MAX_POWER

Mostly quiet shift.

Earthquakes Lockloss 3:23 UTC:

Interestingly was not due to the 6.2 Mag EQ, which we rode through but was due to a 4.5 Mag one closer-by. I don't know why we lost lock to this but I could clearly see the ISI sensor config peakmon traces go off during and for a bit after. The EQ didn't register as an EQ for quite some time and seismic only went to Earthquake mode after the lockloss whereas it was prepared in the case of the 6.2 EQ. Afterwards, we lost lock 2-3 times during IR and DRMI with some minor trouble auto-locking ALSY. So, I ran an initial alignment and DRMI caught without going through PRMI thereafter. We're powering up right now.

TCSY Observing 7-min Drop:

We dropped out of observing for 7 minutes (UTC to 00:22 UTC to 00:29 UTC) but I didn't notice until the announcement back to observing was made. I checked why this was but the only hint that may have been suspicious was that the TCS Y CO2 Laser Power was below threshold for 5 minues at that time. Whether this is the direct cause or a symptom, I do not know yet. This also came back on its own.
LOG: