jeffrey.bartlett@LIGO.ORG - posted 00:08, Thursday 23 February 2017 (34337)
Ops evening Shift Summary
Ops Shift Log: 02/22/2017, Evening Shift 00:00 – 08:00 (16:00 - 00:00) Time - UTC (PT)
State of H1: Locked at NLN, with 64.9 Mpc of range.
Intent Bit: Observing
Support: N/A
Incoming Operator: Corey
Shift Summary: A2L DTT script shows yaw is elevated. LLO being down, I dropped out of Observing for 6 minutes to run the A2L script.
At 06:09 (22:09), a Mag4.8 earthquake struck near Port Hardy, Canada, causing the IFO to lose lock, after almost 40 hours. Given its closeness primary microseism is up to 1.5um/s, secondary is up to 2.1um/s. Switched ISI CONFIG to EARTH_QUAKE_V2 and put the IFO into DOWN until the seismic motion settles down a bit.
Set ISI_CONFIG back to WINDY, and tried locking. Alignment did not look very great, so ran Initial Alignment, and retried locking.
Activity Log: Time - UTC (PT)
00:00 (16:00) Take over from Travis
00:40 (16:40) Drop out of Observing to run the A2L script
00:46 (16:46) Back to Observing
06:09 (22:09) Lockloss – Mag 4.8 EQ near Port Hardy, Canada
08:00 (00:00) Turn over to Corey