To remind that on the day of the HVAC and VAC UPS switch off, magnetometers in CEB were polluted by one extra noise consisting of 1Hz comb noise which was present in the in the CEB UPS currents and was produced by the TCS laser chillers. The contribution of this noise to some magnetic probes can be sized looking at the attached plot. This noise was removed on Feb 20, see https://logbook.virgo-gw.eu/virgo/?r=63357.