<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><b style="font-size:12.8px;text-align:-webkit-auto"><font color="#ff0000">"</font></b><span style="text-align:-webkit-auto"><font color="#ff0000" style=""><span style="font-size:12.8px"><b>Evaluating natural risks and resources from volcanic and geothermal systems, subduction zones, and space weather; or <u>saving the world one magnetotelluric station at a time</u>"</b></span></font></span><br><span style="font-family:georgia,serif"></span><br><b style="font-size:12.8px"><div style="font-size:small;display:inline"><font face="arial, helvetica, sans-serif">Dr. Adam Schultz, Professor of Geophysics, Oregon State University</font></div></b></div><div class="gmail_quote"><font face="arial, helvetica, sans-serif"><span style="font-size:12.8px"><b><br></b></span></font><div class="gmail_quote"><span style="font-size:12.8px">The NSF EarthScope and GeoPRISMS Programs have led to an explosion of high-density magnetotelluric (MT) data of unparalleled quality covering much of the continental US and part of Alaska. By combining information from the EarthScope long-period MT Transportable Array of stations, which are spaced nominally 70-km apart on a regular grid covering much of the continental US, with more targeted, tighter spaced long-period and wideband MT station arrays (MOCHA, iMUSH, Yellowstone, INSPIRE/Alaska experiments), new information is emerging on the accretional history of Cascadia, the magmatic roots of its volcanic arc, the segmentation of its continental margin, and the possible role of slab dehydration derived fluids in seismic stress release; as well as the distribution of melt and hydrothermal fluids beneath Yellowstone caldera, and the coupling between complex ionospheric auroral electric fields and the crust and mantle in a region that transitions from flat slab convergent margin to tectonic North America. These large-array MT experiments, led by OSU but in a number of cases in collaboration with USGS as well as other institutions, will be described and initial findings presented.</span></div><div class="gmail_quote"><span style="font-size:12.8px"><br></span></div><div class="gmail_quote"><span style="font-size:12.8px">In the past half-decade, a previously unanticipated outcome of MT investigations of North America has been their relevance to mitigating risks to built infrastructure; specifically geomagnetically induced currents (GICs) arising from geomagnetic disturbances (GMDs). Most recently, the relevance of studies of this phenomenon to the problem of high altitude electromagnetic pulse, or HEMP weapons, whose late-phase (E3) signatures bear some resemblance to GMDs, has become an issue meriting attention by federal agencies and regulatory bodies.</span></div><div class="gmail_quote"><span style="font-size:12.8px"><br></span></div><div class="gmail_quote"><span style="font-size:12.8px">In order to better address these vulnerabilities, a recently initiated NSF project led by OSU, in collaboration with industry partners PingThings, American Transmission Company, Central Maine Power, and the USGS Geomagnetism Program will develop a Smart Service System (SSS) to enable power utilities to mitigate against damage to the approximately 2200 high-power transformers that underpin the US power transmission network. The SSS will assimilate information on the 3-D electrical conductivity structure of the crust and mantle derived from the aforementioned MT surveys, real-time data streams from the USGS magnetic observatory network and from arrays of sensors installed on the power grid, to provide near real-time predictions of reactive power loss due to GICs, providing power grid operators new information to enable them to modify power grid operations in a time frame meaningful to minimize damage and reduce the likelihood of cascading failures that can seriously disrupt provision of power to large regions of the US. This vulnerability represents a $1T risk to the US economy.</span></div><div><br></div><span style="font-size:12.8px"><br></span><b style="text-align:-webkit-auto;font-size:12.8px"><div style="font-size:small;display:inline"><font face="arial, helvetica, sans-serif">Tuesday, November 14th</font></div><font face="arial, helvetica, sans-serif">, 2017</font></b><br><b style="text-align:-webkit-auto;font-size:12.8px"><span style="font-size:13px"><font face="arial, helvetica, sans-serif"><div style="font-size:small;display:inline"><div style="display:inline"><div style="display:inline">2-3 pm</div> </div></div> (Mountain Time)</font></span></b><br><b style="text-align:-webkit-auto;font-size:12.8px;font-family:arial,helvetica,sans-serif"><span style="font-size:13px">USGS, 1711 Illinois Street, Golden, CO</span></b><br><b style="text-align:-webkit-auto;font-size:12.8px;font-family:arial,helvetica,sans-serif"><span style="font-size:13px">First Floor (Entry Level) <span class="gmail-m_-8968070735390492279m_4896026561608388806gmail-m_3918809983636524111m_7068817575649352729m_-6172873775242136948gmail-m_-4303968599703518853gmail-m_2043882230405221244gmail-m_2480559937188047531m_-1887565490609744462m_8131614935401267798m_6252585815979993878gmail-m_-5616756539997506461gmail-m_3957397034944864967gmail-m_-5590660146057455466gmail-m_2010942344340859242gmail-m_4771098111974711889gmail-m_337406015407620904gmail-m_-5330926199930091226m_647861723187015620gmail-il"><span class="gmail-m_-8968070735390492279m_4896026561608388806gmail-m_3918809983636524111m_7068817575649352729m_-6172873775242136948gmail-m_-4303968599703518853gmail-m_2043882230405221244gmail-m_2480559937188047531m_-1887565490609744462m_8131614935401267798m_6252585815979993878gmail-m_-5616756539997506461gmail-m_3957397034944864967gmail-m_-5590660146057455466gmail-m_2010942344340859242gmail-m_4771098111974711889gmail-il">Seminar</span></span> Room</span></b><br><span style="font-size:12.8px"><br></span><span style="text-align:-webkit-auto;font-size:12.8px;font-family:arial,helvetica,sans-serif">*Note: Please arrive <u>~10 minutes early</u> and <u>bring photo ID</u> for </span><span style="text-align:-webkit-auto;font-size:12.8px;font-family:arial,helvetica,sans-serif">security</span><span style="text-align:-webkit-auto;font-size:12.8px;font-family:arial,helvetica,sans-serif"> measures now in place at the USGS building.</span><br><span style="font-size:12.8px"><br></span><span style="font-size:13px;text-align:-webkit-auto">Thank you,</span><br><span style="font-size:13px;text-align:-webkit-auto"><span class="gmail-m_-8968070735390492279m_4896026561608388806gmail-m_3918809983636524111m_7068817575649352729m_-6172873775242136948gmail-m_-4303968599703518853gmail-m_2043882230405221244gmail-m_2480559937188047531m_-1887565490609744462m_8131614935401267798m_6252585815979993878gmail-m_-5616756539997506461gmail-m_3957397034944864967gmail-m_-5590660146057455466gmail-m_2010942344340859242gmail-m_4771098111974711889gmail-il"><span class="gmail-m_-8968070735390492279m_4896026561608388806gmail-m_3918809983636524111m_7068817575649352729m_-6172873775242136948gmail-m_-4303968599703518853gmail-m_2043882230405221244gmail-m_2480559937188047531m_-1887565490609744462m_8131614935401267798m_6252585815979993878gmail-m_-5616756539997506461gmail-m_3957397034944864967gmail-il"><span class="gmail-m_-8968070735390492279m_4896026561608388806gmail-m_3918809983636524111m_7068817575649352729m_-6172873775242136948gmail-m_-4303968599703518853gmail-m_2043882230405221244gmail-m_2480559937188047531m_-1887565490609744462m_8131614935401267798m_6252585815979993878gmail-m_-5616756539997506461gmail-il">GHSC</span></span></span><font face="arial, sans-serif"> </font><span class="gmail-m_-8968070735390492279m_4896026561608388806gmail-m_3918809983636524111m_7068817575649352729m_-6172873775242136948gmail-m_-4303968599703518853gmail-m_2043882230405221244gmail-m_2480559937188047531m_-1887565490609744462m_8131614935401267798m_6252585815979993878gmail-m_-5616756539997506461gmail-m_3957397034944864967gmail-m_-5590660146057455466gmail-m_2010942344340859242gmail-m_4771098111974711889gmail-m_337406015407620904gmail-m_-5330926199930091226m_647861723187015620gmail-il"><span class="gmail-m_-8968070735390492279m_4896026561608388806gmail-m_3918809983636524111m_7068817575649352729m_-6172873775242136948gmail-m_-4303968599703518853gmail-m_2043882230405221244gmail-m_2480559937188047531m_-1887565490609744462m_8131614935401267798m_6252585815979993878gmail-m_-5616756539997506461gmail-m_3957397034944864967gmail-m_-5590660146057455466gmail-m_2010942344340859242gmail-m_4771098111974711889gmail-il">Seminar</span></span></span><font face="arial, sans-serif" style="font-size:13px;text-align:-webkit-auto"> Committee </font><br><span style="font-size:12.8px"><br></span><span style="font-size:12.8px;text-align:-webkit-auto">Mirus, Ben - </span><a href="mailto:bbmirus@usgs.gov" target="_blank" style="font-size:12.8px;text-align:-webkit-auto">bbmirus@usgs.gov</a><br><span style="font-size:13px;text-align:-webkit-auto">Josh Rigler - </span><a href="mailto:erigler@usgs.gov" target="_blank" style="font-size:13px;text-align:-webkit-auto">erigler@usgs.gov</a><br><div><div class="gmail_extra"><div class="gmail_quote"><span style="font-size:13px;text-align:-webkit-auto">Oliver Boyd - </span><a href="mailto:oboyd@usgs.gov" style="font-size:13px;text-align:-webkit-auto" target="_blank">oboyd@usgs.gov</a></div></div></div>
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