Reports until 09:44, Sunday 05 May 2019
H1 General
edmond.merilh@LIGO.ORG - posted 09:44, Sunday 05 May 2019 - last comment - 13:38, Sunday 05 May 2019(49003)
May be interesting...

13:15UTC noticed H1IFO_RANGE.adl dipped into -1 Mpc and noticed momentary noise on DARM blrms shown below different from typical glitches.

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edmond.merilh@LIGO.ORG - 10:59, Sunday 05 May 2019 (49005)DetChar
Link

This started about 17:45UTC: Some Squeezer Noise Eater foolishness?

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andrew.lundgren@LIGO.ORG - 11:16, Sunday 05 May 2019 (49006)DetChar, ISC, OpsInfo, SQZ
Link 

Yes, this is the squeezer again. It can be diagnosed by a big comb appearing on most of the squeezer fast channels - I usually use H1:SQZ-LASER_IR_LF_OUT_DQ (first plot).

A simple way to diagnose this might be to put up a running trace of H1:SQZ-LASER_IR_LF_OUTPUT, which is a 16 Hz channel. It gets noticeably wider when the noise appears (second plot).
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edmond.merilh@LIGO.ORG - 11:23, Sunday 05 May 2019 (49007)
Link

This all settled down ~ 18:05UTC

daniel.sigg@LIGO.ORG - 11:46, Sunday 05 May 2019 (49008)
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Just turn the noise eater off: Squeezer Overview -> click on the laser.

edmond.merilh@LIGO.ORG - 13:38, Sunday 05 May 2019 (49010)
Link

Will do, DS.