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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:contributor>W. J. Stephenson</dc:contributor>
  <dc:contributor>A.D. Frankel</dc:contributor>
  <dc:contributor>J. K. Odum</dc:contributor>
  <dc:creator>R. A. Williams</dc:creator>
  <dc:date>1999</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;We measured&amp;nbsp;&lt;/span&gt;&lt;i&gt;P&lt;/i&gt;&lt;span&gt;- and&amp;nbsp;&lt;/span&gt;&lt;i&gt;S&lt;/i&gt;&lt;span&gt;-wave seismic velocities to about 40-m depth using seismic-refraction/reflection data on the ground surface at 13 sites in the Seattle, Washington, urban area, where portable digital seismographs recently recorded earthquakes. Sites with the lowest measured V&lt;/span&gt;&lt;sub&gt;&lt;span data-style="small-caps"&gt;s&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;correlate with highest ground motion amplification. These sites, such as at Harbor Island and in the Duwamish River industrial area (DRIA) south of the Kingdome, have an average V&lt;/span&gt;&lt;sub&gt;&lt;span data-style="small-caps"&gt;s&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;in the upper 30 m (V¯&lt;/span&gt;&lt;sub&gt;&lt;span data-style="small-caps"&gt;s30&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;) of 150 to 170 m/s. These values of V¯&lt;/span&gt;&lt;sub&gt;&lt;span data-style="small-caps"&gt;s30&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;place these sites in soil profile type E (V¯&lt;/span&gt;&lt;sub&gt;&lt;span data-style="small-caps"&gt;s30&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&amp;lt; 180 m/s). A “rock” site, located at Seward Park on Tertiary sedimentary deposits, has a V¯&lt;/span&gt;&lt;sub&gt;&lt;span data-style="small-caps"&gt;s30&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;of 433 m/s, which is soil type C (V¯&lt;/span&gt;&lt;sub&gt;&lt;span data-style="small-caps"&gt;s30&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;: 360 to 760 m/s). The Seward Park site V¯&lt;/span&gt;&lt;sub&gt;&lt;span data-style="small-caps"&gt;s30&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;is about equal to, or up to 200 m/s slower than sites that were located on till or glacial outwash. High-amplitude&amp;nbsp;&lt;/span&gt;&lt;i&gt;P&lt;/i&gt;&lt;span&gt;- and&amp;nbsp;&lt;/span&gt;&lt;i&gt;S&lt;/i&gt;&lt;span&gt;-wave seismic reflections at several locations appear to correspond to strong resonances observed in earthquake spectra. An&amp;nbsp;&lt;/span&gt;&lt;i&gt;S&lt;/i&gt;&lt;span&gt;-wave reflector at the Kingdome at about 17 to 22 m depth probably causes strong 2-Hz resonance that is observed in the earthquake data near the Kingdome.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1193/1.1586059</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Sage Publications</dc:publisher>
  <dc:title>Surface seismic measurements of near-surface P-and S-wave seismic velocities at earthquake recording stations, Seattle, Washington</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>