DQ Shift for Week of May 4th

Shifter: Pat Meyers

• DQ page
• 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)

• 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.

• 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)

• EQ at ~7:30-9 UTC Papua New Guinea is getting hit hard...
• 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.

• 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.

• 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.