<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body><div><br></div><div><br></div><div><br></div><div><br></div><div id="composer_signature"><div style="font-size:85%;color:#575757" dir="auto">Sent via the Samsung Galaxy S8, an AT&T 4G LTE smartphone</div></div><div><br></div><div style="font-size:100%;color:#000000"><div>-------- Original message --------</div><div>From: Brendan Geels <<a href="mailto:bgeels@usgs.gov">bgeels@usgs.gov</a>> </div><div>Date: 5/31/18 3:34 PM (GMT-07:00) </div><div>To: GS-HAZ Geomagnetism Employees <<a href="mailto:gs-haz_geomagnetism_employees@usgs.gov">gs-haz_geomagnetism_employees@usgs.gov</a>> </div><div>Subject: BOU E-field 200m issue </div><div><br></div></div><div dir="ltr"><div>All,</div><div><br></div><div>Recently Josh discovered that the 200m North-South electrode at BOU E-field has been producing bad data for maybe about a week. The issue appeared to be hardware related, so Ed checked on it while he was up there doing some other work today. He found that some mooselk had chewed through a sensor wire. Ed repaired it and the data now looks much more reasonable. </div><div>During this process, Ed had to swap the wires on amp a few times. This caused spikes on all 4 E-field channels each time. Here are the approximate disturbance times:</div><div>
<span style="color:rgb(34,34,34);font-family:sans-serif;font-size:13px;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">5/31/2018</span>
20:39<br></div><div>
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20:45</div><div>
<span style="color:rgb(34,34,34);font-family:sans-serif;font-size:13px;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">5/31/2018</span>
20:46</div><div>
<span style="color:rgb(34,34,34);font-family:sans-serif;font-size:13px;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">5/31/2018</span>
21:06</div><div><br></div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">Brendan Geels</div><div>Geomag Systems Engineer</div><div>Contractor - Apogee Engineering, LLC</div></div><div>C: (720)315-9386</div><div>O: (303)273-8409</div></div></div></div></div></div></div></div></div></div></div></div></div>
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