<?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>Vincent Quitoriano</dc:contributor>
  <dc:contributor>Thomas H. Heaton</dc:contributor>
  <dc:contributor>Hiroo Kanamori</dc:contributor>
  <dc:creator>David J. Wald</dc:creator>
  <dc:date>1999</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;We have developed regression relationships between Modified Mercalli Intensity (&lt;/span&gt;&lt;i&gt;I&lt;sub&gt;&lt;span data-style="small-caps"&gt;mm&lt;/span&gt;&lt;/sub&gt;&lt;/i&gt;&lt;span&gt;) and peak ground acceleration (PGA) and velocity (PGV) by comparing horizontal peak ground motions to observed intensities for eight significant California earthquakes. For the limited range of Modified Mercalli intensities (&lt;/span&gt;&lt;i&gt;I&lt;sub&gt;&lt;span data-style="small-caps"&gt;mm&lt;/span&gt;&lt;/sub&gt;&lt;/i&gt;&lt;span&gt;), we find that for peak acceleration with V ≤&amp;nbsp;&lt;/span&gt;&lt;i&gt;I&lt;sub&gt;&lt;span data-style="small-caps"&gt;mm&lt;/span&gt;&lt;/sub&gt;&lt;/i&gt;&lt;span&gt;&amp;nbsp;≤ VIII,&amp;nbsp;&lt;/span&gt;&lt;i&gt;I&lt;sub&gt;&lt;span data-style="small-caps"&gt;mm&lt;/span&gt;&lt;/sub&gt;&lt;/i&gt;&lt;span&gt;&amp;nbsp;= 3.66&amp;nbsp;&lt;/span&gt;&lt;i&gt;log&lt;/i&gt;&lt;span&gt;(&lt;/span&gt;&lt;i&gt;PGA&lt;/i&gt;&lt;span&gt;) − 1.66, and for peak velocity with V ≤&amp;nbsp;&lt;/span&gt;&lt;i&gt;I&lt;sub&gt;&lt;span data-style="small-caps"&gt;mm&lt;/span&gt;&lt;/sub&gt;&lt;/i&gt;&lt;span&gt;&amp;nbsp;≤ IX,&amp;nbsp;&lt;/span&gt;&lt;i&gt;I&lt;sub&gt;&lt;span data-style="small-caps"&gt;mm&lt;/span&gt;&lt;/sub&gt;&lt;/i&gt;&lt;span&gt;&amp;nbsp;= 3.47&amp;nbsp;&lt;/span&gt;&lt;i&gt;log&lt;/i&gt;&lt;span&gt;(&lt;/span&gt;&lt;i&gt;PGV&lt;/i&gt;&lt;span&gt;) + 2.35. From comparison with observed intensity maps, we find that a combined regression based on peak velocity for intensity &amp;gt; VII and on peak acceleration for intensity &amp;lt; VII is most suitable for reproducing observed&amp;nbsp;&lt;/span&gt;&lt;i&gt;I&lt;sub&gt;&lt;span data-style="small-caps"&gt;mm&lt;/span&gt;&lt;/sub&gt;&lt;/i&gt;&lt;span&gt;&amp;nbsp;patterns, consistent with high intensities being related to damage (proportional to ground velocity) and with lower intensities determined by felt accounts (most sensitive to higher-frequency ground acceleration). These new&amp;nbsp;&lt;/span&gt;&lt;i&gt;I&lt;sub&gt;&lt;span data-style="small-caps"&gt;mm&lt;/span&gt;&lt;/sub&gt;&lt;/i&gt;&lt;span&gt;&amp;nbsp;relationships are significantly different from the Trifunac and Brady (1975) correlations, which have been used extensively in loss estimation.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1193/1.1586058</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Sage Publications</dc:publisher>
  <dc:title>Relationships between peak ground acceleration, peak ground velocity, and Modified Mercalli Intensity in California</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>