Reports until 00:15, Monday 20 January 2020
LHO General
patrick.thomas@LIGO.ORG - posted 00:15, Monday 20 January 2020 (54591)
Ops Eve Shift Summary
TITLE: 01/19 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 118Mpc
INCOMING OPERATOR: Cheryl
SHIFT SUMMARY: Two lock losses from observing, no obvious cause. Currently riding through 6.3 magnitude eq in South Georgia and the South Sandwich Is.
LOG:

00:10 UTC Lock loss from observing.
00:14 UTC Set SEI_CONF to WINDY. This might have helped the Y arm lock on green.
00:39 UTC Lock loss from RESONANCE. ISI BS stage 2 watch dog tripped.
00:46 UTC Lock loss from TURN_ON_BS_STAGE_2 (probably because it was tripped).
00:50 UTC Pausing at FIND_IR to untrip ISI BS stage 2. It went to DAMPED, but the nominal is HIGH_ISOLATED. Not sure if I should request HIGH_ISOLATED?
00:56 UTC Lock loss from FIND_IR
01:09 UTC Lock loss from PRMI_ASC
01:16 UTC Lock loss from ACQUIRE_DRMI_1F
01:17 UTC Pausing at READY. Setting ISI BS stage 2 request to HIGH_ISOLATED. It kept going back to DAMPED. Set SEI_BS to FULLY_ISOLATED. It went to FULLY_ISOLATED.
01:21 UTC Hit INIT. SEI_BS went to ISOLATED_DAMPED.
01:23 UTC Relocking.
01:32 UTC Lock loss from CARM_150_PICOMETERS. Pausing at READY to step out of control room.
01:41 UTC Set SEI_CONF to USEISM
01:43 UTC Relocking.
02:19 UTC NLN. No intervention.
02:21 UTC Accepted CALCS SDF differences. Observing.

02:35 UTC Verbal notification of a magnitude 5.3 incoming earthquake from Guam. Is on the borderline of not doing anything on the EQ response zones plot. Going to leave SEI configuration alone.

04:08 UTC Lock loss from observing.
04:37 UTC Lock loss from DHARD_WFS.
05:19 UTC NLN. No intervention.
05:20 UTC Accepted CALC SDF differences. Observing.

07:04 UTC Took SEI_CONF to EARTH_QUAKE for 6.3 eq in South Georgia and the South Sandwich Is.