Ops Shift Log: 01/25/2020, Evening Shift 00:00 – 08:00 (16:00 - 00:00) Time - UTC (PT)

State of H1: Locked at NLN Range 115.6Mpc

Intent Bit: Observing

Support: N/A

Incoming Operator: Niko

Shift Summary: At 03:36 (19:36), the IFO lost lock for unknown reason. After a few failures to get through DRMI/PRMI started an Initial Alignment. Four minutes after starting IA, had incoming EQ alert. Per guidance switched to EQ mode. After finishing IA went back to WINDY mode as EQ had passed. Second locking attempt failed again at PRMI/DRMI. Ran a second Initial Alignment. The third attempt at relocking went off without a hitch. Made it back to NLN & Observing before another round of several strong earthquakes from the Aleutians started. These continued throughout the rest of the shift. Manage to stay locked for the remainer of the shift.  

 

Activity Log: Time - UTC (PT)

00:00 (16:00) Take over from Patrick

03:36 (19:36) Lockloss – Unknown

03:38 (19:38) Reload ISC_DRMI per aLOG #54706

03:59 (19:59) Start Initial Alignment

04:03 (20:03) Switch to EQ mode due to incoming Mag5.7 from Japan

04:18 (20:18) Initial Alignment finished

04:20 (20:20) Switch back to WINDY

04:22 (20:22) Start second locking attempt

05:21 (21:21) Strat second Initial Alignment after several failures to get past DRMI

05:47 (21:47) Finished Initial Alignment

05:48 (21:48) Strat relocking attempt

06:28 (22:28) Locked at NLN

06:31 (22:31) Cleared two SDF DIFFs and back in Observing

06:38 (22:38) Switch to EARTHQUAKE mode for multiple incoming Mag5.3 to 6.1 from Aleutians

08:00 (00:00) Turn over to Niko