<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"><span style="font-size:12.8px"><b>Magnitude, moment, and ground motion"</b></span></font></span><br><font face="arial, helvetica, sans-serif"><b><br></b></font><b>Professor Bob Herrmann,</b><b style="font-size:12.8px"><div style="font-size:small;display:inline"><font face="arial, helvetica, sans-serif"><div class="gmail_quote" style="display:inline"> University of St. Louis</div></font></div></b><br><font face="arial, helvetica, sans-serif"><span style="font-size:12.8px"><b><br></b></span></font>The relation between local magnitude and Mw can be empirically determined with the qualification the local magnitude is a measure of observed ground motion and not the source and that moment magnitude is a derived quantity that depends on an assumed crustal model and source depth. Neither local nor moment magnitude are easy to determine and their relation to each other is problematic Using a new method for adapting the IASPEI ML formula to different regional propagation, the question is whether this technique is robust enough for operations. Drawing upon > 1200 ML and Mw estimate, successes and problems will be highlighted. Using IRIS archived waveforms to study earthquakes several years ago permits an investigation of data sampling – the NX data provide close-in estimates but were not available at the time of the events. Even with problems in ML, the ability to estimate Mw from ML is required. Can the scatter be understood?<br><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">Thursday, January 11th, 2017</font></div></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">10-11 am</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">Entry Level <span 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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"> measure<wbr>s 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="m_2258183199822655102gmail-m_-4171596897656218249m_9106775657748341738gmail-m_6925426022411937115m_7055967733504661449gmail-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 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class="m_2258183199822655102gmail-m_-4171596897656218249m_9106775657748341738gmail-m_6925426022411937115m_7055967733504661449gmail-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="m_2258183199822655102gmail-m_-4171596897656218249m_9106775657748341738gmail-m_6925426022411937115m_7055967733504661449gmail-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><span style="font-size:13px;text-align:-webkit-auto">Oliver Boyd - </span><a href="mailto:oboyd@usgs.gov" target="_blank" style="font-size:13px;text-align:-webkit-auto">oboyd@usgs.gov</a><br><br>------------------------------<wbr>-------------------<br><br><span style="font-size:12.8px">Note: to add or remove your email from this list, please click the link below or send an email directly to the listserve and await further instructions. </span><br><div><div class="gmail_extra"><br></div></div>
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