Summary of the Abrahamson and Silva NGA Ground Motion Relations
In previous ground-motion models, the range of applicability of the empirical ground-motion models was based on the range covered by the available empirical data set; however, in hazard studies, the ground motion must be computed for all relevant earthquakes, so the limits on the range of applicability were often ignored. To address this issue, the Next Generation Attenuation (NGA) project required the developers of the models to extrapolate their models such that they are applicable to all crustal earthquakes relevant for seismic hazard analyses in California.
Abrahamson, N.A. and Silva, W.J., 2008, Summary of the Abrahamson and Silva NGA ground motion relations. Earthquake Spectra, v. 24, p. 67-97.
The Forest Service will host its remaining two public meetings in Queen Valley on October 8 and in Tempe on October 10.
Video & Materials
A video presentation – the same information introduced at each public meeting – as well as meeting materials (posters and newsletter) are available for public review.
Draft EIS Released
The Draft Environmental Impact Statement (DEIS) for the Resolution Copper Project and Land Exchange is now available for review under the 'EIS Info' tab.
Comment on DEIS
Optional ways to comment on the Draft EIS are located under the 'EIS Info' and the 'Public Involvement' tabs.