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DQ Shift for Week of May 4th

Shifter: Pat Meyers

May 4th, 2015

  • Looks like maybe an EQ around 0100 UTC. One of these three? 1,2, 3?
  • Translational motion (but not vertical) at 300 level consistent throughout the day: 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 (see here)

May 5th, 2015

  • EQ or something big between 1:30 and 3 am 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: 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) 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: here
  • One especially large spike seen in all UG stations at ~22:30 UTC: seen here
  • 2000C E channel has a glitch at around 7:00UTC whose amplitude takes ~1 hour to decrease back to level of noise here.
  • ORO,WTP seeing some very interesting changes in amplitude throughout the day: ORO and 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

  • WTP and ORO still show amplitude fluctuations at start of day: WTP and 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: 800 and 2000C. Note these were the channels that were recentered. It's like that's what this spike is; see here 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 seen here.
  • Maybe another one in Papua New Guinea? 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: time series. Also seen a little bin in 2000C.
  • ORO has interesting amplitude changes throughout the day seen here.
  • Maybe an EQ around 12:00 UTC here.
  • 5.4 in New Guinea seen here and 4.9 and Vanuatu here.

May 10th, 2015

groups/homestake/monitoring/may4.txt · Last modified: 2015/05/10 12:19 by meyers