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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hello HOTties,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Just forwarding this geomagnetic storm alert (see below) – today will not be a good day for GPS surveying.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Happy Mapping,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>=Russ<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> SWPC Product Subscription Service [mailto:SWPC.Products@noaa.gov] <br><b>Sent:</b> Tuesday, March 17, 2015 8:07 AM<br><b>To:</b> russdeffner@gmail.com<br><b>Subject:</b> ALERT: Geomagnetic K-index of 8 (G4)<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><pre>Space Weather Message Code: ALTK08<o:p></o:p></pre><pre>Serial Number: 18<o:p></o:p></pre><pre>Issue Time: 2015 Mar 17 1401 UTC<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>ALERT: Geomagnetic K-index of 8<o:p></o:p></pre><pre>Threshold Reached: 2015 Mar 17 1358 UTC<o:p></o:p></pre><pre>Synoptic Period: 1200-1500 UTC<o:p></o:p></pre><pre> <o:p></o:p></pre><pre>Active Warning: Yes<o:p></o:p></pre><pre>NOAA Scale: G4 - Severe<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>NOAA Space Weather Scale descriptions can be found at<o:p></o:p></pre><pre><a href="http://www.swpc.noaa.gov/noaa-scales-explanation">www.swpc.noaa.gov/noaa-scales-explanation</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.<o:p></o:p></pre><pre>Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.<o:p></o:p></pre><pre>Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.<o:p></o:p></pre><pre>Navigation - Satellite navigation (GPS) degraded or inoperable for hours.<o:p></o:p></pre><pre>Radio - HF (high frequency) radio propagation sporadic or blacked out.<o:p></o:p></pre><pre>Aurora - Aurora may be seen as low as Alabama and northern California.<o:p></o:p></pre><p class=MsoNormal><o:p> </o:p></p><div class=MsoNormal align=center style='text-align:center'><hr size=3 width="100%" align=center></div><p class=MsoNormal>Thank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the <a href="https://pss.swpc.noaa.gov">Product Subscription Site.</a> Please do not use the from address for correspondence, as it is not monitored. For comments or help, please contact <a href="mailto:pss.help@noaa.gov">SWPC Help.</a><o:p></o:p></p></div></body></html>