thomas.shaffer@LIGO.ORG - posted 07:50, Wednesday 28 June 2023 - last comment - 08:28, Wednesday 28 June 2023(70911)
Ops Day Shift Start
TITLE: 06/28 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 143Mpc
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 4mph Gusts, 1mph 5min avg
Primary useism: 0.01 μm/s
Secondary useism: 0.06 μm/s
QUICK SUMMARY: Locked for almost 18 hours, range in the 140s. Quiet on site so far.
Janos noted that while he was at EY he heard some loud banging off in the distance, possible concrete hammer or small explosions?
I took a quick look at the sei .3-1hz blrms time series and didn't notice anything in the last hour (1st attachment). The EY microphones had one small feature at around 14:45:31 UTC (2nd screen shot), and it looks to be lower frequency (3rd screenshot, blue trace at the time, red just before). So maybe this is what Janos was referring to? I'm not seeing any other features elsewhere though.