<?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:contributor>Peter J. Haeussler</dc:contributor>
  <dc:contributor>R.L. Bruhn</dc:contributor>
  <dc:contributor>G.C. Willis</dc:contributor>
  <dc:creator>J.B. Willis</dc:creator>
  <dc:date>2007</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The western segment of the Castle Mountain fault poses a significant seismic hazard to the most populated region of south-central Alaska. We identify a previously unrecognized margin of a postglacial outwash channel that is offset right laterally 36 &amp;plusmn; 4 m across the western segment of the Castle Mountain fault. This offset occurred after glaciers withdrew from the lowland 11,300&amp;ndash;15,380 cal yr&amp;nbsp;&lt;/span&gt;&lt;span class="sc"&gt;b.p.&lt;/span&gt;&lt;span&gt;&amp;nbsp;and after outwash channel margins were cut and stabilized 11,210&amp;ndash;13,470 cal yr&amp;nbsp;&lt;/span&gt;&lt;span class="sc"&gt;b.p.&lt;/span&gt;&lt;span&gt;&amp;nbsp;Using these ages and the measured separation, we obtain a maximum slip rate of 3.0 &amp;plusmn; 0.6 mm yr&lt;/span&gt;&lt;span&gt;&amp;minus;1&lt;/span&gt;&lt;span&gt;&amp;nbsp;and a minimum slip rate of 2.8 &amp;plusmn; 0.7 mm yr&lt;/span&gt;&lt;span&gt;&amp;minus;1&lt;/span&gt;&lt;span&gt;. These are the first lateral slip rates for the Castle Mountain fault established by a field measurement. Based on timing of the most recent earthquake, 670 &amp;plusmn; 60 yr&amp;nbsp;&lt;/span&gt;&lt;span class="sc"&gt;b.p.&lt;/span&gt;&lt;span&gt;, the Castle Mountain fault could have accumulated an average single-event slip of about 1.9 m (extremes range from 1.3 to 2.6 m). The fault consists of two segments; a surface-rupturing earthquake likely will be limited to the 62-km-long western segment. Area-magnitude regression calculations suggest that such an earthquake on the western Castle Mountain fault would have a moment magnitude of 6.9 to 7.3.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1785/0120060109</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Seismological Society of America</dc:publisher>
  <dc:title>Holocene slip rate for the western segment of the Castle Mountain fault, Alaska</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>