There is a noticeable dip in today's range 09/29 at 17:00UTC (attachment1). Zoomed in(attachment2), it is two separate dips set next to each other, where each affected our range for about 20 minutes.

I found that the H1:PEM-CS_ACC_BEAMTUBE_YMAN_X accelerometer had measured a lot of movement at the time of the first dip and lowered our range by almost 10Mpc (excluding the glitches)(attachment3). We found that this dip was correlated to the CP1 fill(73169) that started at 17:00UTC and lasted 18 minutes(attachment4). This had been seen in the range previously by Marissa and Brina (71301).

With regards to the second range dip we have not found a cause for that yet - all we know is that it showed up the most distinctly in BLRMS bands 1(10-20Hz) and 5(100-450Hz)(attachment5). It is also possible that this dip would otherwise have been a small range fluctuation if not for the CP1 fill having just affected us.