====== DQ Shift for Week of May 4th ======
Shifter: Pat Meyers
====May 4th, 2015====
  * [[http://homepages.spa.umn.edu/~prestegard/homestake/day_overview.php?date=2015_05_04|DQ page]]
  * Looks like maybe an EQ around 0100 UTC. One of these three? [[http://earthquake.usgs.gov/earthquakes/eventpage/us20002b34#general_summary|1]],[[http://earthquake.usgs.gov/earthquakes/eventpage/us20002b2x#general_summary|2]], [[http://earthquake.usgs.gov/earthquakes/eventpage/us20002b2k#general_summary|3]]?
  * Translational motion (but not vertical) at 300 level consistent throughout the day: [[http://homepages.spa.umn.edu/~prestegard/homestake/show_plots.php?date=2015_05_04&time=daily&type=station&label=300|300 level page.]]
  * Sharp spike at around 1900 UTC in all sensors, not consistent with timing error/other channels that I can see.
  * 2000C mass position 1 is "high" and 3 is close to that ---> 4V,-3.8V ([[http://homepages.spa.umn.edu/~prestegard/homestake/show_plots.php?date=2015_05_04&time=daily&type=station&label=C2000|see here]])
====May 5th, 2015====
  * EQ or something big between 1:30 and 3 am [[http://earthquake.usgs.gov/earthquakes/eventpage/us20002bnf#general_summary|This one, I'd guess...]]. 
  * Sharp spike at 2000E station at 11:30UTC.
  * WTP showing non-stationarity late in the day in N/E channels.
  * 4850A mass position 1/2/3/timing quality all go crazy at 00:00UTC: [[http://homepages.spa.umn.edu/~prestegard/homestake/show_plots.php?date=2015_05_05&time=daily&type=station&label=A4850|seen here]].
  * 2000C mass positions still high (see above link); 2000E mass position still nonsense.
  * 800 level mass position 2 high (and climbing throughout day today and yesterday) [[http://homepages.spa.umn.edu/~prestegard/homestake/show_plots.php?date=2015_05_05&time=daily&type=channel&label=VM2|here]].
====May 6th, 2015====
  * Timing quality normal. 5 drops for underground stations spaced throughout day. Seems standard.
  * 300 station has spikes in it's time series: [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_06/daily/station_300_channel_LHE.png|here]]
  * One especially large spike seen in all UG stations at ~22:30 UTC: [[http://homepages.spa.umn.edu/~prestegard/homestake/show_plots.php?date=2015_05_06&time=daily&type=channel&label=LHE| seen here]]
  * 2000C E channel has a glitch at around 7:00UTC whose amplitude takes ~1 hour to decrease back to level of noise [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_06/daily/station_C2000_channel_LHE.png|here]].
  * ORO,WTP seeing some very interesting changes in amplitude throughout the day: [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_06/daily/station_ORO_channel_LHE.png|ORO]] and [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_06/daily/station_WTP_channel_LHE.png|WTP]].
  * ORO, WTP and 2000C artifacts ONLY show up in N and E channels, not in Z channel. 
  * Mass positions for 800, 2000C showing voltages above where we'd like them to be. They are recentered by Tanner on May 7th (UTC time)
====May 7th, 2015====
  * EQ at ~7:30-9 UTC [[http://earthquake.usgs.gov/earthquakes/eventpage/us20002das#general_summary|Papua New Guinea is getting hit hard...]]
  * WTP and ORO still show amplitude fluctuations at start of day: [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_07/daily/station_WTP_channel_LHE.png|WTP]] and [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_07/daily/station_ORO_channel_LHE.png|ORO]]
  * 800 and 2000C showing large spikes at the beginning of day. Large enough to wash out EQ on the scale of the time series: [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_07/daily/station_800_channel_LHZ.png|800]] and [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_07/daily/station_C2000_channel_LHZ.png|2000C]]. Note these were the channels that were recentered. It's like that's what this spike is; see here [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_07/daily/station_C2000_channel_VM1.png|2000C recentered]].
  * spikes in time series at 19:30 and 20:00 UTC in most channels. 
  * Timing quality shows 8 drops, consistent across all UG stations. 
====May 8th, 2015====
  * EQ around 8:45UTC [[http://homepages.spa.umn.edu/~prestegard/homestake/show_plots.php?date=2015_05_08&time=daily&type=channel&label=LHE|seen here]].
  * Maybe another one in Papua New Guinea? [[http://earthquake.usgs.gov/earthquakes/eventpage/us20002dqa#general_summary|EQ page]]. Though there really isn't one close to this time >2.5 that I can find.
  * 
====May 9th, 2015====
  * 2000D has spike at beginning of day only in E and N channels: [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_09/daily/station_D2000_channel_LHE.png|time series]]. Also seen a little bin in 2000C.
  * ORO has interesting amplitude changes throughout the day [[http://homepages.spa.umn.edu/~prestegard/homestake/plots/2015_05_09/daily/station_ORO_channel_LHE.png|seen here]].
  * Maybe an EQ around 12:00 UTC [[http://homepages.spa.umn.edu/~prestegard/homestake/show_plots.php?date=2015_05_09&time=daily&type=channel&label=LHZ|here]].
  * 5.4 in New Guinea [[http://earthquake.usgs.gov/earthquakes/eventpage/us20002e1u#general_summary|seen here]] and 4.9 and Vanuatu [[http://earthquake.usgs.gov/earthquakes/eventpage/us20002e1w#general_summary|here]].
====May 10th, 2015====