<div dir="ltr">

<div dir="ltr" style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)"><img src="cid:ii_jftpyzl60_162afcee1ec90f95" width="544" height="82" class="gmail-m_-3778277510898844835gmail-CToWUd gmail-CToWUd"><br>​<br>​​<br>​​<u style="color:rgb(51,51,51);font-family:Merriweather,Times,serif;font-size:1.7625em">USGS Geomagnetism Program Daily Report</u></div><div dir="ltr" style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)"><div style="font-weight:400;font-size:12.8px"><font color="#0000ff"><br></font></div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff">The following discrepancies were noted this day:<br></font></div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff"><br></font></div><div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff"><b>BRT</b><span> </span>- <span> </span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">is down for updates to the system. Brendan will notify the group when system is up.</span></font></div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff"><br></font></div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff"><span style="font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><b>DED</b></span><span style="font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span> </span>-  </span></font><span style="color:rgb(0,0,255);font-size:12.8px;font-family:"Source Sans Pro",Helvetica,Arial,sans-serif;text-align:center">ΔF</span><span style="color:rgb(0,0,255);font-size:12.8px"> has spike at 09:38:00 on 4/11/18 (YD 101) due to bin change on Z</span></div><div style="font-weight:400;font-size:12.8px"><br></div><div><font color="#0000ff"><span style="font-family:arial,sans-serif;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="font-size:12.8px"><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><b>CMO<span> </span></b></span><span style="font-weight:400;color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">- </span><span style="font-weight:400;color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span> There are 3 bin change spikes in the 

<span style="color:rgb(0,0,255);font-family:"Source Sans Pro",Helvetica,Arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:center;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">ΔF occurring at 06:54:00 and 14:40:00 on 

<span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255);float:none;display:inline">4/10/18 (YD 100)</span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255);float:none;display:inline"><span> </span></span> and  </span> 08:35:00 on

<span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">4/11/18 (YD 101).</span>

 </span></span><span style="font-weight:400;color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255);float:none;display:inline">There is a gap in the SQ from 00:06:00 through 00:08:00 UT, on 4/11/18 (YD 101)</span><span style="font-weight:400;color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span> </span></span><span> </span><br></span></span></font></div><div style="font-weight:400"><font color="#0000ff"><span style="font-family:arial,sans-serif;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="font-size:12.8px"><br></span></span></font></div><div><font color="#0000ff"><span style="font-family:arial,sans-serif;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="font-size:12.8px"><b>SHU</b><span> </span>- <span> </span><span style="font-weight:400;color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">There is a gap in the SQ from 03:18:00 through 03:20:00 UT, on 4/11/18 (YD 101)</span><span> </span><br></span><br></span></font></div><div style="font-size:12.8px"><font color="#0000ff"><b>BSL</b> -  <span style="font-weight:400"> </span><span style="font-weight:400;color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">There is a gap in the Dist from 08:21:00 through 08:23:00 UT, on 4/11/18 (YD 101)</span></font></div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff"><br></font></div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff"><b>TUC</b><span> </span>-   <span> </span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">There is a gaps in the Dist,SQ, and SV from 17:11:00 through 18:24:00 UT, on on 4/10/18 (YD 100).</span></font></div><div style="font-weight:400;font-size:12.8px"><br></div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff">---</font></div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff"><br></font></div><div style="font-weight:400;font-size:12.8px"><div style="font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><b style="font-size:12.8px"><span style="font-size:12.8px"><u><font color="#0000ff">Dist, SQ and SV:</font></u></span></b></div><div style="font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px"><span style="font-size:12.8px"><span style="font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><font color="#0000ff"><br></font></span></span></span></div><div style="font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><span style="font-size:12.8px"><span style="font-size:12.8px"><span style="font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">There is a<span> SQ</span> gaps in the CMO plot from<span> </span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255);float:none;display:inline">00:06:00 through 00:08:00 UT, on 4/11/18 (YD 101)</span></span> and also the SHU SQ plot<span> </span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255);float:none;display:inline"><span> </span>from 03:18:00 through 03:20:00 UT, on 4/11/18 (YD 101)</span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span> </span></span>. <span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"> </span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255);float:none;display:inline">There is a gap in the BSL Dist from 08:21:00 through 08:23:00 UT, on 4/11/18 (YD 101)</span> .</span> </span></span><span style="font-size:12.8px"><span style="font-size:12.8px"><div style="font-size:12.8px;display:inline">There are gaps in the Dist,SQ, and SV plots at Tucson<span> </span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">from<span> </span></span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">17:11:00 through 18:24:00 UT, on</span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"> on 4/10/18 (YD 100)</span><span> </span><span style="color:rgb(0,0,255);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">.</span><span> </span>These data gaps, at both observatories, may have been caused by internet outages. </div></span></span><br></font></div><div style="font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><b><font color="#0000ff"><br></font></b></span></div><div style="font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="text-align:start;text-indent:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><b><span style="text-align:start;text-indent:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px"><font color="#0000ff"><u>Boulder E-Field:</u></font></span></span></b></span></div><div style="font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="text-align:start;text-indent:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="text-align:start;text-indent:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px"><font color="#0000ff">  None</font></span></span></span></div><font color="#0000ff"><br></font></div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff"> </font></div><div style="font-weight:400;font-size:12.8px"><font color="#0000ff"><b>DST<span> </span></b>-  There is the daily offset in the USGS Dst-1min plot resulting from the corresponding data gap in the plot for Kakioka at around the end/start of each day.</font></div></div></div>

<br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><font face="Arial, sans-serif" style="color:rgb(136,136,136);font-size:12.8px">John M. Spritzer</font><br style="color:rgb(136,136,136);font-size:12.8px;font-family:Arial,sans-serif"><font color="#888888" face="Arial, sans-serif">Geophysicist/Engineer</font><br><div style="color:rgb(136,136,136);font-size:12.8px"><span style="font-family:Arial,sans-serif">USGS/Geologic Hazards Science Center</span></div><div style="color:rgb(136,136,136);font-size:12.8px"><span style="font-family:Arial,sans-serif">PO Box 25046, <a href="https://maps.google.com/?q=MS+966+Denver,+CO+80225+Office&entry=gmail&source=g" style="color:rgb(17,85,204)" target="_blank">MS 966</a></span><br style="font-family:Arial,sans-serif"><span style="font-family:Arial,sans-serif"><a href="https://maps.google.com/?q=MS+966+Denver,+CO+80225+Office&entry=gmail&source=g" style="color:rgb(17,85,204)" target="_blank">Denver, CO 80225</a></span><br style="font-family:Arial,sans-serif"><span style="font-family:Arial,sans-serif"><a href="https://maps.google.com/?q=MS+966+Denver,+CO+80225+Office&entry=gmail&source=g" style="color:rgb(17,85,204)" target="_blank">Office</a>: 303-273-8430</span></div><div style="color:rgb(136,136,136);font-size:12.8px"><span style="font-family:Arial,sans-serif">Fax:  303-273-8506</span><br style="font-family:Arial,sans-serif"><br></div></div></div></div></div>
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