<div dir="ltr"><p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:12pt;line-height:107%">DED - Spikes on ΔF at 20:51 UT and
22:02 UT on 8/18/2019.</span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:12pt;line-height:107%">CMO - ΔF has large disturbances of unknown
origin, similar to the CMO</span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:12pt;line-height:107%">T-Electric but inverse in amplitude. </span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:12pt;line-height:107%">SIT - erroneous temperature spikes in
all Temperature channels. Possible operational amp failure of temperature board
failure.</span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span class="gmail-observatory"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">FRD</span><span style="box-sizing:border-box"> – </span></span><span class="gmail-channel"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">ΔF</span> has spikes at 08:00 UT and 09:24 UT on 8/17/2019</span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span class="gmail-observatory"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">TUC</span><span style="box-sizing:border-box"> – </span></span><span class="gmail-channel"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">ΔF</span> and F has a spike 20:22 Ut on 8/17/2019 and spikes at
02:45 UT and 09:05 UT on 8/18/2019. </span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span class="gmail-observatory"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">BSL</span><span style="box-sizing:border-box"> – </span></span><span class="gmail-channel"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">ΔF</span> has a small spike at 18:43 UT on 08/18/2019. </span><span class="gmail-observatory"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">BSL</span><span style="box-sizing:border-box"> – </span></span><span class="gmail-channel"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">Dist</span> has a gap from 08:13 – 10:21 on 08/19/2019.</span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span class="gmail-channel"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">HON Temperature sensors are not producing valid data. Possible
bad op-amp or temp board.</span></span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span class="gmail-observatory"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">SJG</span><span style="box-sizing:border-box"> – </span></span><span class="gmail-channel"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">ΔF</span> has multiple disturbances from 11:05 UT and ongoing.</span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span class="gmail-channel"><span style="font-size:12pt;line-height:107%;color:rgb(51,51,51)">GAU – Data products still off-line.</span></span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><span class="gmail-channel"><b><span style="font-size:13pt;line-height:107%;font-family:"Source Sans Pro",sans-serif;color:rgb(51,51,51)"> </span></b></span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">BOU – E-filed OK</p><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><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"><font face="Arial, sans-serif">Cell: 303-908-0324</font></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></div></div>