<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Rigler, Erin (Josh)</b> <span dir="ltr"><<a href="mailto:erigler@usgs.gov">erigler@usgs.gov</a>></span><br>Date: Mon, Feb 12, 2018 at 1:14 PM<br>Subject: [Geomag-data] Data disturbance at USGS FRN (Fresno) observatory - Tuesday, February 13, 2018 (tomorrow)<br>To: <a href="mailto:geomag-data@geohazards.usgs.gov">geomag-data@geohazards.usgs.gov</a>, <a href="mailto:geomag-operations@geohazards.usgs.gov">geomag-operations@geohazards.usgs.gov</a><br><br><br><div dir="ltr"><br><div class="gmail_quote"><div dir="ltr"><div style="font-family:monospace,monospace"><p dir="ltr" style="line-height:1.295;margin-top:0pt;margin-bottom:8pt" id="m_-4900719439087464085m_-5296700632668537746gmail-docs-internal-guid-f33152e2-7b5b-d685-9f5d-2c76fda3106f"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">USGS Geomag Data Users: </span></p><p dir="ltr" style="line-height:1.295;margin-top:0pt;margin-bottom:8pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">This is a notification of an impending modification to the Fresno Geomagnetic Observatory (FRN) data.  </span></p><p dir="ltr" style="line-height:1.295;margin-top:0pt;margin-bottom:8pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Geomag Observatory: </span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">FRN</span></p><p dir="ltr" style="line-height:1.295;margin-top:0pt;margin-bottom:8pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Start Date/Time: </span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">02/13/2018 – 16:00:00 UTC</span></p><div>​ (tomorrow)​</div><p></p><p dir="ltr" style="line-height:1.295;margin-top:0pt;margin-bottom:8pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">This modification is: </span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">planned</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">  </span></p><p dir="ltr" style="line-height:1.295;margin-top:0pt;margin-bottom:8pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">NOTES: The fluxgate sensor at the FRN observatory, near Fresno, CA, will be replaced. This requires a break in real time data continuity, and may result in a brief interval of corrupted raw data in the archive (this will be flagged and removed in subsequent definitive processing, as per usual).</span></p><p dir="ltr" style="line-height:1.295;margin-top:0pt;margin-bottom:8pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">More relevant to real-time data users is that certain derived products cannot be reliably generated until the new instrument has stabilized magnetically, and several absolute calibration measurements have been performed over the course of a few days to weeks following this operation.</span></p><p dir="ltr" style="line-height:1.295;margin-top:0pt;margin-bottom:8pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">The table below details the effects and timelines of this modification on various geomagnetic data and geomagnetic data products.  </span></p><div dir="ltr" style="margin-left:0pt"><table style="border-width:medium;border-style:none;border-color:currentcolor;border-collapse:collapse"><colgroup><col width="96"><col width="96"><col width="144"><col width="144"><col width="149"></colgroup><tbody><tr style="height:0pt"><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Product</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Effect</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Estimated Start Date/Time:</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Estimated End Date/Time:</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Notes:</span></p></td></tr><tr style="height:0pt"><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Raw</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Offsets/Drift/</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Disturbance</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/13/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">16:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/14/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">01:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">allow ample time for hardware swap-out</span></p></td></tr><tr style="height:0pt"><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Quasi Definitive</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Possible Outage</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/13/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">16:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/15/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">01:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">reliable calibration required</span></p></td></tr><tr style="height:0pt"><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Definitive</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Possible Outage</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/13/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">16:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/15/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">01:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">reliable calibration required</span></p></td></tr><tr style="height:0pt"><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Adjusted</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Outage</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/13/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">16:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/20/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">00:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">multiple stable calibrations required</span></p></td></tr><tr style="height:0pt"><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">XYZ</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Offsets</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/13/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">16:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/20/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">00:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">multiple stable calibrations required</span></p></td></tr><tr style="height:0pt"><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">SQ</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Offsets/</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Drift</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/13/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">16:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">3/15/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">00:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">~30 Day filter within algorithm</span></p></td></tr><tr style="height:0pt"><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">SV</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Offsets/</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Drift</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/13/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">16:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">3/15/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">00:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">~30 Day filter within algorithm</span></p></td></tr><tr style="height:0pt"><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">DIST</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Offsets/</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Drift</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">2/13/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">16:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">3/15/2018</span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap"><br class="m_-4900719439087464085m_-5296700632668537746gmail-kix-line-break"></span><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">00:00 UTC</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">~30 Day filter within algorithm</span></p></td></tr><tr style="height:0pt"><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">DST</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">NA</span></p></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><br></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><br></td><td style="border-width:1.5pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:0pt 5.4pt"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Not a DST Station</span></p></td></tr></tbody></table></div><br><p dir="ltr" style="line-height:1.295;margin-top:0pt;margin-bottom:8pt"><span style="font-size:11pt;font-family:Calibri;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap">Additional notification will be sent once real-time data products have been fully restored to normal operation.  Please direct any questions or concerns to <a href="mailto:geomag-data@geohazards.usgs.gov" target="_blank">geomag-data@geohazards.usgs.go<wbr>v</a>. </span></p></div></div>
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