Reports until 18:35, Thursday 27 June 2019
H1 AOS (DetChar)
corey.gray@LIGO.ORG - posted 18:35, Thursday 27 June 2019 (50254)
~48Hz Line Active (Dropping H1 Range)

Starting at around 0:50utc, noticed H1 range drop.  Drop looks correlated with DARM's 38-60Hz band.  And sure enough we see the infamous ~48Hz line getting bigger. Will keep monitoring.

Attachement #1:  38-60Hz line

Here you see this band slowly growing during an hour long stretch where we had no glitches. 

Attachement #2:  48Hz line on DARM spectra

Here is a random screenshot when the line was large.  (and also a glimps of the range drop over the last 40min.

Images attached to this report