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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>David Boore</dc:creator>
  <dc:date>2020</dc:date>
  <dc:description>&lt;p&gt;The three sets of ground‐motion predictions (GMPs) of&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;a class="link link-ref xref-bibr" data-modal-source-id="rf11"&gt;Boore (2018&lt;/a&gt;; hereafter, B18) are compared with a much larger dataset than was used in deriving the predictions. The B18 GMPs work well for response spectra at periods between&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="inline-formula no-formula-id"&gt;&lt;span id="MathJax-Element-3-Frame" class="MathJax" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;mo xmlns=&amp;quot;&amp;quot; form=&amp;quot;prefix&amp;quot;&gt;&amp;amp;#x223C;&lt;/mo&gt;&lt;mn xmlns=&amp;quot;&amp;quot;&gt;0.15&lt;/mn&gt;&lt;/math&gt;"&gt;&lt;span id="MathJax-Span-39" class="math"&gt;&lt;span&gt;&lt;span id="MathJax-Span-40" class="mrow"&gt;&lt;span id="MathJax-Span-41" class="mo"&gt;∼&lt;/span&gt;&lt;span id="MathJax-Span-42" class="mn"&gt;0.15&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="MJX_Assistive_MathML"&gt;∼0.15&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;and 4.0&amp;nbsp;s after an adjustment accounting for a path bias at distances beyond 200&amp;nbsp;km—this was the maximum distance used to derive the stress parameters on which the simulations in B18 are based. An additional offset adjustment is needed in the B18 predictions for short and long periods. The adjustment at short periods may be because the&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="inline-formula no-formula-id"&gt;&lt;span id="MathJax-Element-4-Frame" class="MathJax" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;msub xmlns=&amp;quot;&amp;quot;&gt;&lt;mi&gt;&amp;amp;#x3BA;&lt;/mi&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;"&gt;&lt;span id="MathJax-Span-43" class="math"&gt;&lt;span&gt;&lt;span id="MathJax-Span-44" class="mrow"&gt;&lt;span id="MathJax-Span-45" class="msub"&gt;&lt;span id="MathJax-Span-46" class="mi"&gt;κ&lt;/span&gt;&lt;span id="MathJax-Span-47" class="mn"&gt;0&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="MJX_Assistive_MathML"&gt;κ0&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;of 0.006&amp;nbsp;s stipulated by the Next Generation Attenuation‐East (NGA‐East) project to be used in deriving the GMPs is inconsistent with the observations on rock sites. The explanation for the offset adjustment at long periods is not clear, but it could be a combination of limitations of the point‐source stochastic model for longer period motions, as well as a decreasing number of observations at longer periods available to constrain the simulations on which the predictions are based.&lt;/p&gt;&lt;p&gt;The predictions of B18, developed for very‐hard‐rock sites (&lt;span class="inline-formula no-formula-id"&gt;⁠&lt;span id="MathJax-Element-5-Frame" class="MathJax" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;msub xmlns=&amp;quot;&amp;quot;&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mn&gt;30&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;"&gt;&lt;span id="MathJax-Span-48" class="math"&gt;&lt;span&gt;&lt;span id="MathJax-Span-49" class="mrow"&gt;&lt;span id="MathJax-Span-50" class="msub"&gt;&lt;span id="MathJax-Span-51" class="mi"&gt;V&lt;/span&gt;&lt;span id="MathJax-Span-52" class="mrow"&gt;&lt;span id="MathJax-Span-53" class="mi"&gt;S&lt;/span&gt;&lt;span id="MathJax-Span-54" class="mn"&gt;30&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="MJX_Assistive_MathML"&gt;VS30&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;of 2000 and&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="inline-formula no-formula-id"&gt;&lt;span id="MathJax-Element-6-Frame" class="MathJax" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;mn xmlns=&amp;quot;&amp;quot;&gt;3000&lt;/mn&gt;&lt;mtext xmlns=&amp;quot;&amp;quot;&gt;&amp;amp;#x2009;&amp;amp;#x2009;&lt;/mtext&gt;&lt;mi xmlns=&amp;quot;&amp;quot; mathvariant=&amp;quot;normal&amp;quot;&gt;m&lt;/mi&gt;&lt;mo xmlns=&amp;quot;&amp;quot;&gt;/&lt;/mo&gt;&lt;mi xmlns=&amp;quot;&amp;quot; mathvariant=&amp;quot;normal&amp;quot;&gt;s&lt;/mi&gt;&lt;/math&gt;"&gt;&lt;span id="MathJax-Span-55" class="math"&gt;&lt;span&gt;&lt;span id="MathJax-Span-56" class="mrow"&gt;&lt;span id="MathJax-Span-57" class="mn"&gt;3000&lt;/span&gt;&lt;span id="MathJax-Span-58" class="mtext"&gt;  &lt;/span&gt;&lt;span id="MathJax-Span-59" class="mi"&gt;m&lt;/span&gt;&lt;span id="MathJax-Span-60" class="mo"&gt;/&lt;/span&gt;&lt;span id="MathJax-Span-61" class="mi"&gt;s&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="MJX_Assistive_MathML"&gt;3000  m/s&lt;/span&gt;&lt;/span&gt;⁠&lt;/span&gt;), have here been extended down to&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="inline-formula no-formula-id"&gt;&lt;span id="MathJax-Element-7-Frame" class="MathJax" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;msub xmlns=&amp;quot;&amp;quot;&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mn&gt;30&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;"&gt;&lt;span id="MathJax-Span-62" class="math"&gt;&lt;span&gt;&lt;span id="MathJax-Span-63" class="mrow"&gt;&lt;span id="MathJax-Span-64" class="msub"&gt;&lt;span id="MathJax-Span-65" class="mi"&gt;V&lt;/span&gt;&lt;span id="MathJax-Span-66" class="mrow"&gt;&lt;span id="MathJax-Span-67" class="mi"&gt;S&lt;/span&gt;&lt;span id="MathJax-Span-68" class="mn"&gt;30&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="MJX_Assistive_MathML"&gt;VS30&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;values as low as&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="inline-formula no-formula-id"&gt;&lt;span id="MathJax-Element-8-Frame" class="MathJax" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;mn xmlns=&amp;quot;&amp;quot;&gt;200&lt;/mn&gt;&lt;mtext xmlns=&amp;quot;&amp;quot;&gt;&amp;amp;#x2009;&amp;amp;#x2009;&lt;/mtext&gt;&lt;mi xmlns=&amp;quot;&amp;quot; mathvariant=&amp;quot;normal&amp;quot;&gt;m&lt;/mi&gt;&lt;mo xmlns=&amp;quot;&amp;quot;&gt;/&lt;/mo&gt;&lt;mi xmlns=&amp;quot;&amp;quot; mathvariant=&amp;quot;normal&amp;quot;&gt;s&lt;/mi&gt;&lt;/math&gt;"&gt;&lt;span id="MathJax-Span-69" class="math"&gt;&lt;span&gt;&lt;span id="MathJax-Span-70" class="mrow"&gt;&lt;span id="MathJax-Span-71" class="mn"&gt;200&lt;/span&gt;&lt;span id="MathJax-Span-72" class="mtext"&gt;  &lt;/span&gt;&lt;span id="MathJax-Span-73" class="mi"&gt;m&lt;/span&gt;&lt;span id="MathJax-Span-74" class="mo"&gt;/&lt;/span&gt;&lt;span id="MathJax-Span-75" class="mi"&gt;s&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="MJX_Assistive_MathML"&gt;200  m/s&lt;/span&gt;&lt;/span&gt;⁠&lt;/span&gt;. I find, as have others, that for a given&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="inline-formula no-formula-id"&gt;&lt;span id="MathJax-Element-9-Frame" class="MathJax" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;msub xmlns=&amp;quot;&amp;quot;&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mn&gt;30&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;"&gt;&lt;span id="MathJax-Span-76" class="math"&gt;&lt;span&gt;&lt;span id="MathJax-Span-77" class="mrow"&gt;&lt;span id="MathJax-Span-78" class="msub"&gt;&lt;span id="MathJax-Span-79" class="mi"&gt;V&lt;/span&gt;&lt;span id="MathJax-Span-80" class="mrow"&gt;&lt;span id="MathJax-Span-81" class="mi"&gt;S&lt;/span&gt;&lt;span id="MathJax-Span-82" class="mn"&gt;30&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="MJX_Assistive_MathML"&gt;VS30&lt;/span&gt;&lt;/span&gt;⁠&lt;/span&gt;, there is generally less site amplification for central and eastern North America (CENA) than for the active crustal region dataset used for the&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;a class="link link-ref xref-bibr" data-modal-source-id="rf15"&gt;Boore, Stewart,&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;i&gt;et&amp;nbsp;al.&lt;/i&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;(2014&lt;/a&gt;; hereafter, BSSA14) GMP equations. This might have an impact on conclusions of several previous studies of CENA GMPs that used the site amplifications in BSSA14 in comparing data and predictions.&lt;/p&gt;&lt;p&gt;An additional finding is that the&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="inline-formula no-formula-id"&gt;&lt;span id="MathJax-Element-10-Frame" class="MathJax" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;msub xmlns=&amp;quot;&amp;quot;&gt;&lt;mi&gt;&amp;amp;#x3BA;&lt;/mi&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;"&gt;&lt;span id="MathJax-Span-83" class="math"&gt;&lt;span&gt;&lt;span id="MathJax-Span-84" class="mrow"&gt;&lt;span id="MathJax-Span-85" class="msub"&gt;&lt;span id="MathJax-Span-86" class="mi"&gt;κ&lt;/span&gt;&lt;span id="MathJax-Span-87" class="mn"&gt;0&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="MJX_Assistive_MathML"&gt;κ0&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;implied by recordings on a subset of stations in the Charlevoix region located on rock (data from these stations were not used in the analysis described earlier) is more consistent with a value near 0.014&amp;nbsp;s than the 0.006&amp;nbsp;s value used in B18 and the NGA‐East project.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1785/0220190190</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Seismological Society of America</dc:publisher>
  <dc:title>Revision of Boore (2018) Ground‐motion predictions for Central and Eastern North America: Path and offset adjustments and extension to 200 m/s &lt;= Vs30 &lt;= 3000 m/s</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>