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Chiou and Youngs PEER-NGA Empirical Ground Motion Model for ...

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Figure 6: Relationship between VS30 <strong>and</strong> Z1.0 <strong>and</strong> Z2.5 <strong>for</strong> sites contained in the <strong>PEER</strong>-<strong>NGA</strong> database.<br />

Dashed line on plot <strong>for</strong> Z1.0 was used to infer missing values.<br />

SUPPLEMENTAL EMPRIRICAL DATA<br />

The <strong>PEER</strong>-<strong>NGA</strong> strong motion data were supplemented with ground motion data from the<br />

Cali<strong>for</strong>nia TriNet system. Time histories recorded at broad b<strong>and</strong> stations <strong>for</strong> events 0163,<br />

0167, <strong>and</strong> 0170 were provided by Dave Boore (personal communication, 2005). Peak<br />

acceleration values <strong>and</strong> estimates of site conditions <strong>for</strong> many other events were supplied by<br />

Jack Boatwright (2005, 2006 personal communication) <strong>and</strong> were obtained from the TriNet<br />

website. Appendix D describes the development of metadata <strong>and</strong> processing of these strong<br />

motion values. The data were used to provide additional guidance on function <strong>for</strong>ms <strong>and</strong><br />

provide additional constraints on parameters of the ground motion model.<br />

C&Y2006 Page 12

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