<div dir="ltr">Greg,<div>Thanks for the input. At Fredericksburg and other observatories, our observers might tell us if there was lightning during the time in question. Otherwise we look at the nature of the disturbance to see what might have caused the disturbance. If the problem persists, we will investigate potential sources, like the ones you suggested, to see if there is a cause outside of our acquisition system. </div><div><br></div><div>Ed</div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 25, 2018 at 4:05 PM, Lucas, Greg <span dir="ltr"><<a href="mailto:glucas@usgs.gov" target="_blank">glucas@usgs.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Operations team,<div><br></div><div>I'm curious if 'lightning' gets classified differently than any other artificial disturbance in processing, or why it is critical to ask whether it was lightning in the reports? Possibly to make sure it isn't faulty electronics?</div><div><br></div><div>I'm sure you all don't like me giving you more data to look at, but here it is anyways :)</div><div><br></div><div><b>Lightning maps:</b></div><div><a href="http://en.blitzortung.org/historical_maps.php?map=30" target="_blank"></a><a href="http://en.blitzortung.org/historical_maps.php" style="font-size:small;background-color:rgb(255,255,255)" target="_blank">http://en.blitzortung.org/<wbr>historical_maps.php</a><br></div><div>You can select previous days/times and get a general idea of whether there was lightning in the area or not.</div><div>Per Ed's comments below:</div><div>FRD appears to be lightning</div><div>SJG appears to be lightning</div><div>TUC does <b>not</b> appear to be lightning.</div><div><br></div><div><b>Historic Weather Reports:</b></div><div>There are many automated weather reporting stations (generally at airports) that you can access the historical records of. There was some strong storm that blew through Fredericksburg on 6/24 for instance.</div><div><a href="https://www.wunderground.com/history/airport/KEZF/2018/6/24/DailyHistory.html?req_city=Fredericksburg&req_state=VA&req_statename=Virginia&reqdb.zip=22401&reqdb.magic=1&reqdb.wmo=99999" target="_blank">FRD Data</a></div><div>You can also search for other days/locations in there too. This can all be automated to send alerts if there are storms in the area etc... Possibly a fun and useful task for a summer student?</div><div><br></div><div>Greg</div><div><br></div><div><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 25, 2018 at 3:33 PM, Sauter, Edward <span dir="ltr"><<a href="mailto:esauter@usgs.gov" target="_blank">esauter@usgs.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">
<span style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">All,</span><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial">The following discrepancies were noted this<span> </span><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-m_-4933504891852092684gmail-m_9107299278391618427gmail-m_-8146586752197696483gmail-m_-8779503049596937818gmail-m_-7964305357318284706gmail-m_-8003049807466857982gmail-m_1556062698259809097gmail-m_4941510747652131176m_-9166683750500871032m_4618539290430034157gmail-m_-5578195645788776160gmail-m_-4934784313512708303m_-6469005706006967777m_-2351599047996174184gmail-il"><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-il">day</span></span>:</div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><br></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><b><font color="#0000ff">Barrow. The Total Field magnetometer is still awaiting a replacement electronics. Therefore all derived products are absent: D, Del F, X, Y, Dist, SQ, and SV. </font></b></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><b><font color="#0000ff"><br></font></b></div><div style="text-decoration-style:initial;text-decoration-color:initial"><font color="#ff0000"><span style="font-size:12.8px;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;text-decoration-style:initial;text-decoration-color:initial"><b>Deadhorse. There were data gaps in the Fluxgate and Temperature data at the following times and dates: </b></span><b style="font-size:12.8px">1633 through 1645 UT, 6/23/18 (YD 174), 1630 through 1634 UT, 6/24/18 (YD 175), and 0651 through 0659 UT, 6/25/18 (YD 176). This suggests a problem with the 802 </b><span style="font-size:12.8px"><b>acquisition</b></span><b style="font-size:12.8px"> unit and/or GPS timing. </b></font></div><div style="font-size:12.8px;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;text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><b><br></b></font></span></div>
<b style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><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"><font>Fredericksburg. There were numerous Artificial Disturbances from 1859 through 2129 UT, 6/24/18 (YD 175). Lightning? </font></span></font></b>
<div style="font-size:12.8px;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;text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><b><b style="color:rgb(34,34,34);background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><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"><font><br></font></span></font></b></b></font></span></div><div style="font-size:12.8px;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;text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><b><b style="color:rgb(34,34,34);background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><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"><font>Tucson.
<b style="color:rgb(34,34,34);text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><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"><font><span> </span>There were numerous Artificial Disturbances from 0438 through 0528 UT, on 6/25/18 (YD 176). Lightning?</font></span></font></b>
</font></span></font></b></b></font></span></div><div style="font-size:12.8px;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;text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><b><b style="color:rgb(34,34,34);background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><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"><font><b style="color:rgb(34,34,34);text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><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"><font><br></font></span></font></b></font></span></font></b></b></font></span></div><div style="font-size:12.8px;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;text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><b><b style="color:rgb(34,34,34);background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><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"><font><b style="color:rgb(34,34,34);text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><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"><font>San Juan. </font></span></font></b></font></span></font></b></b></font><b style="color:rgb(0,0,255);font-size:12.8px"><b style="color:rgb(34,34,34)"><font color="#0000ff"><span style="font-size:12.8px"><b style="color:rgb(34,34,34)"><font color="#0000ff"><span style="font-size:12.8px"><div style="color:rgb(34,34,34);font-weight:400;display:inline"><span style="font-size:12.8px"><font color="#0000ff"><b><b style="color:rgb(34,34,34)"><font color="#0000ff"><span style="font-size:12.8px"><b style="color:rgb(34,34,34)"><font color="#0000ff"><span style="font-size:12.8px">There were numerous Artificial Disturbances from 0738 through 0930 UT, on 6/23/18 (YD 174). </span></font></b></span></font></b></b></font></span></div></span></font></b></span></font></b></b></span></div><div style="font-size:12.8px;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;text-decoration-style:initial;text-decoration-color:initial"><font color="#0000ff"><b><br></b></font></span></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><b style="color:rgb(0,0,255);font-size:12.8px">Dist, SQ and SV. As mentioned above, the Dist, SQ and SV plots from Barrow are absent. <b style="font-size:12.8px">There are gaps at Tucson in the Dist, Sq and SV plots at the following times and dates: 0533 through 0539 UT and
<b style="background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><b style="font-size:12.8px">2105</b></b> through 2154 UT, 6/24/18 (YD 175), and 1139 through 1254 UT, 6/25/18 (YD 176). These gaps correspond with internet outages at Tucson. </b></b></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><b style="color:rgb(0,0,255);font-size:12.8px"><b style="font-size:12.8px"><br></b></b></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><b style="font-size:12.8px"><font color="#0000ff">Boulder E-Field. None</font></b><br></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><b><font color="#0000ff"><span style="font-size:small"></span></font></b></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:small"><b><font color="#0000ff"><br></font></b></span></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><b style="font-size:12.8px"><font color="#0000ff"><span style="font-size:12.8px"><span style="font-size:12.8px"><span style="font-size:12.8px">DST. </span></span></span></font><span style="font-size:12.8px"><font color="#0000ff"><span style="font-size:12.8px"><span style="font-size:12.8px">There is the <span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-m_-4933504891852092684gmail-m_9107299278391618427gmail-m_-8146586752197696483gmail-m_-8779503049596937818gmail-m_-7964305357318284706gmail-m_-8003049807466857982gmail-m_1556062698259809097gmail-m_4941510747652131176m_-9166683750500871032m_4618539290430034157gmail-m_-5578195645788776160gmail-m_-4934784313512708303m_-6469005706006967777m_-2351599047996174184gmail-m_4541714856653899550gmail-m_5828507217575981462m_5619460708191346482m_-2017466412658871962gmail-m_9041280072951628934gmail-m_7124475271636269527gmail-m_1279933179262584788m_-3112327762979607758gmail-m_2211898979332883115gmail-m_-6233513516820568374gmail-m_-3840893730070104930gmail-m_-9030155418796022944gmail-m_-5054793621936123105gmail-m_-8691096301322998621gmail-m_2572926524748812295gmail-m_7535836511749105221gmail-m_-2531933207393602040gmail-m_-3259764650837820617gmail-m_-761036240257809399gmail-m_-7162980476312530791gmail-m_-37850137032792681gmail-m_2602765925039608144m_-4293583474061502485gmail-m_6503427114658427093gmail-m_-3747392658200601095gmail-m_-1486669443561360418gmail-m_-6774390905602162080gmail-m_5647709510029416012gmail-m_9174026292177732908gmail-il"><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-m_-4933504891852092684gmail-m_9107299278391618427gmail-m_-8146586752197696483gmail-m_-8779503049596937818gmail-m_-7964305357318284706gmail-m_-8003049807466857982gmail-m_1556062698259809097gmail-m_4941510747652131176m_-9166683750500871032m_4618539290430034157gmail-m_-5578195645788776160gmail-m_-4934784313512708303m_-6469005706006967777m_-2351599047996174184gmail-m_4541714856653899550gmail-m_5828507217575981462m_5619460708191346482m_-2017466412658871962gmail-m_9041280072951628934gmail-m_7124475271636269527gmail-m_1279933179262584788m_-3112327762979607758gmail-m_2211898979332883115gmail-m_-6233513516820568374gmail-m_-3840893730070104930gmail-m_-9030155418796022944gmail-m_-5054793621936123105gmail-m_-8691096301322998621gmail-m_2572926524748812295gmail-m_7535836511749105221gmail-m_-2531933207393602040gmail-m_-3259764650837820617gmail-m_-761036240257809399gmail-m_-7162980476312530791gmail-m_-37850137032792681gmail-il"><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-m_-4933504891852092684gmail-m_9107299278391618427gmail-m_-8146586752197696483gmail-m_-8779503049596937818gmail-m_-7964305357318284706gmail-m_-8003049807466857982gmail-m_1556062698259809097gmail-m_4941510747652131176m_-9166683750500871032m_4618539290430034157gmail-m_-5578195645788776160gmail-m_-4934784313512708303m_-6469005706006967777m_-2351599047996174184gmail-m_4541714856653899550gmail-m_5828507217575981462m_5619460708191346482m_-2017466412658871962gmail-m_9041280072951628934gmail-m_7124475271636269527gmail-m_1279933179262584788m_-3112327762979607758gmail-m_2211898979332883115gmail-m_-6233513516820568374gmail-m_-3840893730070104930gmail-m_-9030155418796022944gmail-il"><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-m_-4933504891852092684gmail-m_9107299278391618427gmail-m_-8146586752197696483gmail-m_-8779503049596937818gmail-m_-7964305357318284706gmail-m_-8003049807466857982gmail-m_1556062698259809097gmail-m_4941510747652131176m_-9166683750500871032m_4618539290430034157gmail-m_-5578195645788776160gmail-m_-4934784313512708303m_-6469005706006967777m_-2351599047996174184gmail-m_4541714856653899550gmail-m_5828507217575981462m_5619460708191346482m_-2017466412658871962gmail-m_9041280072951628934gmail-m_7124475271636269527gmail-il"><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-m_-4933504891852092684gmail-m_9107299278391618427gmail-m_-8146586752197696483gmail-m_-8779503049596937818gmail-m_-7964305357318284706gmail-m_-8003049807466857982gmail-m_1556062698259809097gmail-m_4941510747652131176m_-9166683750500871032m_4618539290430034157gmail-m_-5578195645788776160gmail-m_-4934784313512708303m_-6469005706006967777m_-2351599047996174184gmail-il"><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-m_-4933504891852092684gmail-m_9107299278391618427gmail-m_-8146586752197696483gmail-m_-8779503049596937818gmail-m_-7964305357318284706gmail-il"><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-il">daily</span></span></span></span></span></span></span> 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 <span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-m_-4933504891852092684gmail-m_9107299278391618427gmail-m_-8146586752197696483gmail-m_-8779503049596937818gmail-m_-7964305357318284706gmail-m_-8003049807466857982gmail-m_1556062698259809097gmail-m_4941510747652131176m_-9166683750500871032m_4618539290430034157gmail-m_-5578195645788776160gmail-m_-4934784313512708303m_-6469005706006967777m_-2351599047996174184gmail-m_4541714856653899550gmail-m_5828507217575981462m_5619460708191346482m_-2017466412658871962gmail-m_9041280072951628934gmail-m_7124475271636269527gmail-m_1279933179262584788m_-3112327762979607758gmail-m_2211898979332883115gmail-m_-6233513516820568374gmail-m_-3840893730070104930gmail-m_-9030155418796022944gmail-il"><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-m_-4933504891852092684gmail-m_9107299278391618427gmail-m_-8146586752197696483gmail-m_-8779503049596937818gmail-m_-7964305357318284706gmail-m_-8003049807466857982gmail-m_1556062698259809097gmail-m_4941510747652131176m_-9166683750500871032m_4618539290430034157gmail-m_-5578195645788776160gmail-m_-4934784313512708303m_-6469005706006967777m_-2351599047996174184gmail-m_4541714856653899550gmail-m_5828507217575981462m_5619460708191346482m_-2017466412658871962gmail-m_9041280072951628934gmail-m_7124475271636269527gmail-il"><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-m_-4933504891852092684gmail-m_9107299278391618427gmail-m_-8146586752197696483gmail-m_-8779503049596937818gmail-m_-7964305357318284706gmail-m_-8003049807466857982gmail-m_1556062698259809097gmail-m_4941510747652131176m_-9166683750500871032m_4618539290430034157gmail-m_-5578195645788776160gmail-m_-4934784313512708303m_-6469005706006967777m_-2351599047996174184gmail-il"><span class="m_-3099528437164561972gmail-m_-7821723632250115775gmail-il">day</span></span></span></span>.</span></span></font></span></b><br></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:small;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"><div style="color:rgb(34,34,34);font-weight:400;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"><b style="font-size:12.8px"><font color="#0000ff"><span style="font-size:12.8px"><span style="font-size:12.8px"><br></span></span></font></b></div></span><span style="color:rgb(34,34,34);font-weight:400;font-size:12.8px;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">That's all.</span></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><br></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px">Ed Sauter</span></div></div></blockquote></div></div></div></blockquote></div>
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