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Reports until 17:09, Monday 18 September 2023
H1 PEM (DetChar, PEM)
corey.gray@LIGO.ORG - posted 17:09, Monday 18 September 2023 - last comment - 17:38, Monday 18 September 2023(72949)
WIND & Range Nose-Diving Starting at 2320!

Starting around 30+min ago, the wind gusts have passed the 30mph threshhold and are touching 40mph!  This is leading to our local "perfect storm":  (1) high winds (see image #1) and (2) high microseism (see image #2). 

Jeff mentioned the distinct noise bump on DARM between 20-80Hz (see image #3) is characteristic of stray light hitting our EX Cryobaffle when we have a noisy environment such as this.  This has also dropped our range down around 100Mpc (from 140) [see image #4].

With all this said, it's impressive H1 is riding through this noisy Earth!  According to NOAA, we will be under a red flag warning (screenshot is image #5) for another ~3hrs (or 8pmPT / 0300utc).

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corey.gray@LIGO.ORG - 17:38, Monday 18 September 2023 (72951)

~0018utc Wind gust hit around 50mph at EY!

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