DQ Shifter: Edgard Bonilla.

Fellow: Daniel Vander-Hyde.

Mentor: Beverly Berger.

Summary for the shift:

• A cluster of low frequency glitches were incited when two earthquakes from New Zealand hit the IFO during Observing mode on Tuesday at 10:15 UTC.
• On Friday, there was a segment with an unusually consistent BNS range (almost no loud glitches), ranging from 06:00 to 11:00 UTC.
• Two segments containing whistle glitches appeared on Saturday. One of them was coincident with PEM work.
• The change in calibration lines for Pcal Y on Tuesday seems to have made the spectrum cleaner for all days after.
• There was a ~500 Hz injection on Pcal X on Monday.
• The beginning of the week has a consistent ~50 Hz glitching. It disappeared midday on Saturday and is completely absent on Sunday.
• There was a Propane forklift injection during observing on Wednesday at 16:35 UTC.

More information can be found at: DQShiftLHO20190415