ryan.short@LIGO.ORG - posted 07:42, Monday 27 October 2025 - last comment - 10:16, Monday 27 October 2025(87761)
Ops Day Shift Start
TITLE: 10/27 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Earthquake
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
SEI_ENV state: EARTHQUAKE
Wind: 10mph Gusts, 7mph 3min avg
Primary useism: 0.19 μm/s
Secondary useism: 0.26 μm/s
QUICK SUMMARY: H1 lost lock at 12:48 UTC after spedning almost 16 hours locked from a M6.5 EQ out of the Caribbean. Still in EQ mode, so will start relocking once ground motion calms down.
- Wind low, microseism moderate at ~70th percentile
- All other systems nominal
H1 back to NLN at 16:57 UTC.
Ran in initial alignment then set to relocking automatically. Paused in a couple of places on the way up for Elenna to make some ASC measurements, now starting some commissioning activities which are slated to be wrapped up by 18:30 UTC.
And of course as soon as I'm about to post this, lockloss @ 17:14 UTC from what looks like an ETM glitch.