<?xml version='1.0' encoding='utf-8'?>
<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>2016</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;This short note contains two contributions related to deriving depth‐dependent velocity and density models for use in computing generic crustal amplifications. The first contribution is a method for interpolating two velocity profiles to obtain a third profile with a time‐averaged velocity&amp;nbsp;&lt;/span&gt;&lt;span id="inline-formula-2" class="inline-formula"&gt;&lt;img class="inline-graphic" src="http://www.bssaonline.org/content/early/2015/12/29/0120150229/embed/inline-graphic-2.gif" alt="Graphic" /&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;to depth&amp;nbsp;&lt;/span&gt;&lt;i&gt;Z&lt;/i&gt;&lt;span&gt;&amp;nbsp;that is equal to a specified value (e.g., for shear‐wave velocity&amp;nbsp;&lt;/span&gt;&lt;i&gt;V&lt;/i&gt;&lt;sub&gt;&lt;i&gt;S&lt;/i&gt;&lt;/sub&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;span id="inline-formula-3" class="inline-formula"&gt;&lt;img class="inline-graphic" src="http://www.bssaonline.org/content/early/2015/12/29/0120150229/embed/inline-graphic-3.gif" alt="Graphic" /&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;for&amp;nbsp;&lt;/span&gt;&lt;i&gt;Z&lt;/i&gt;&lt;span&gt;=30&amp;thinsp;&amp;thinsp;m, in which the subscript&amp;nbsp;&lt;/span&gt;&lt;i&gt;S&lt;/i&gt;&lt;span&gt;&amp;nbsp;has been added to indicate that the average is for shear‐wave velocities). The second contribution is a procedure for obtaining densities from&amp;nbsp;&lt;/span&gt;&lt;i&gt;V&lt;/i&gt;&lt;sub&gt;&lt;i&gt;S&lt;/i&gt;&lt;/sub&gt;&lt;span&gt;. The first contribution is used to extend and revise the&amp;nbsp;&lt;/span&gt;&lt;span id="xref-ref-4-2" class="xref-bibr"&gt;Boore and Joyner (1997)&lt;/span&gt;&lt;span&gt;&amp;nbsp;generic rock&amp;nbsp;&lt;/span&gt;&lt;i&gt;V&lt;/i&gt;&lt;sub&gt;&lt;i&gt;S&lt;/i&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;model, for which&amp;nbsp;&lt;/span&gt;&lt;span id="inline-formula-4" class="inline-formula"&gt;&lt;img class="inline-graphic" src="http://www.bssaonline.org/content/early/2015/12/29/0120150229/embed/inline-graphic-4.gif" alt="Graphic" /&gt;&lt;/span&gt;&lt;span&gt;, to a model with the more common&amp;nbsp;&lt;/span&gt;&lt;span id="inline-formula-5" class="inline-formula"&gt;&lt;img class="inline-graphic" src="http://www.bssaonline.org/content/early/2015/12/29/0120150229/embed/inline-graphic-5.gif" alt="Graphic" /&gt;&lt;/span&gt;&lt;span&gt;. This new model is then used with the densities from the second contribution to compute crustal amplifications for a generic site with&amp;nbsp;&lt;/span&gt;&lt;span id="inline-formula-6" class="inline-formula"&gt;&lt;img class="inline-graphic" src="http://www.bssaonline.org/content/early/2015/12/29/0120150229/embed/inline-graphic-6.gif" alt="Graphic" /&gt;&lt;/span&gt;&lt;span&gt;.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1785/0120150229</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Seismological Society of America</dc:publisher>
  <dc:title>Determining generic velocity and density models for crustal amplification calculations, with an update of the Boore and Joyner (1997) Generic Site Amplification for Graphic Site Amplification</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>