Ops Shift Log: 08/17/2017, Evening Shift 23:00 – 07:00 (16:00 - 00:00) Time - UTC (PT)

State of H1: Unlocked

Intent Bit: Environmental/Earthquake

Support: Jim W.,

Incoming Operator: Jim

Shift Summary: A2L Pitch and Yaw are both below the reference.

Lockloss due to Mag6.8 earthquake north of Ascension Island.

Put IFO in DOWN until mother Gaia calms down.

Relocking – While damping ETMX Violin modes 1, 3, 5 took another incoming earthquake. Although not as strong as the Ascension Island earthquake, it broke lock and reexcited the Violin modes. Relocking; holding at ENGAGE_REFL_POP_WFS while damping ETMX Violin mode 1, 3, 4, 5. 

 

Activity Log: Time - UTC (PT)

23:00 (16:00) Take over from Cheryl

03:51 (20:51) Lockloss – Mag6.8 EQ North of Ascension Island

                     Switch SEI_CONFIG to LARGE_EQ_NOBRSXY

03:59 (20:59) GRB Alert – No action – IFO down due to earthquake near Ascension Island

04:03 (21:03) Put the IFO into DOWN until seismic activity settles down a bit.

07:00 (00:00) Turn over to Jim