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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>Bernard A. Chouet</dc:contributor>
  <dc:contributor>Andrew M. Pitt</dc:contributor>
  <dc:creator>Phillip B. Dawson</dc:creator>
  <dc:date>2016</dc:date>
  <dc:description>&lt;p&gt;High-resolution tomographic &lt;i&gt;P&lt;/i&gt; wave, &lt;i&gt;S&lt;/i&gt; wave, and &lt;i&gt;V&lt;sub&gt;P&lt;/sub&gt;&lt;/i&gt;/&lt;i&gt;V&lt;sub&gt;S&lt;/sub&gt;&lt;/i&gt; velocity structure models are derived for Mammoth Mountain, California, using phase data from the Northern California Seismic Network and a temporary deployment of broadband seismometers. An anomalous volume (5.1 &amp;times; 10&lt;sup&gt;9&lt;/sup&gt; to 5.9 &amp;times; 10&lt;sup&gt;10&lt;/sup&gt;m&lt;sup&gt;3&lt;/sup&gt;) of low &lt;i&gt;P&lt;/i&gt; and low &lt;i&gt;S&lt;/i&gt; wave velocities is imaged beneath Mammoth Mountain, extending from near the surface to a depth of &amp;sim;2 km below sea level. We infer that the reduction in seismic wave velocities is due to the presence of CO&lt;sub&gt;2&lt;/sub&gt; distributed in oblate spheroid pores with mean aspect ratio &lt;i&gt;&amp;alpha;&lt;/i&gt; = 1.6 &amp;times; 10&lt;sup&gt;&amp;minus;3&lt;/sup&gt; to 7.9 &amp;times; 10&lt;sup&gt;&amp;minus;3&lt;/sup&gt; (crack-like pores) and mean gas volume fraction &lt;i&gt;ϕ&lt;/i&gt; = 8.1 &amp;times; 10&lt;sup&gt;&amp;minus;4&lt;/sup&gt; to 3.4 &amp;times; 10&lt;sup&gt;&amp;minus;3&lt;/sup&gt;. The pore density parameter &lt;i&gt;&amp;kappa;&lt;/i&gt; = 3&lt;i&gt;ϕ&lt;/i&gt;/(4&amp;pi;&lt;i&gt;&amp;alpha;&lt;/i&gt;) = &lt;i&gt;na&lt;/i&gt;&lt;sup&gt;3&lt;/sup&gt;=0.11, where &lt;i&gt;n&lt;/i&gt; is the number of pores per cubic meter and a is the mean pore equatorial radius. The total mass of CO&lt;sup&gt;2&lt;/sup&gt; is estimated to be 4.6 &amp;times; 10&lt;sup&gt;9&lt;/sup&gt; to 1.9 &amp;times; 10&lt;sup&gt;11&lt;/sup&gt; kg. The local geological structure indicates that the CO&lt;sub&gt;2&lt;/sub&gt; contained in the pores is delivered to the surface through fractures controlled by faults and remnant foliation of the bedrock beneath Mammoth Mountain. The total volume of CO&lt;sub&gt;2&lt;/sub&gt; contained in the reservoir suggests that given an emission rate of 500 tons day&lt;sup&gt;&amp;minus;1&lt;/sup&gt;, the reservoir could supply the emission of CO&lt;sub&gt;2&lt;/sub&gt; for &amp;sim;25&amp;ndash;1040 years before depletion. Continued supply of CO&lt;sub&gt;2&lt;/sub&gt; from an underlying magmatic system would significantly prolong the existence of the reservoir.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1002/2015JB012537</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>American Geophysical Union</dc:publisher>
  <dc:title>Tomographic image of a seismically active volcano: Mammoth Mountain, California</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>