Empirical Response Spectral Attenuation Relations for Shallow Crustal Earthquakes
Using a database of 655 recordings from 58 earthquakes, empirical response spectral attenuation relations are derived for the average horizontal and vertical component for shallow earthquakes in active tectonic regions. A new feature in this model is the inclusion of a factor to distinguish between ground motions on the hanging wall and footwall of dipping faults.
Abrahamson, N.A. and Silva, W.J., 1997, Empirical response spectral attenuation relations for shallow crustal earthquakes: Seismological Research Letters, v. 68, p. 94-127.
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EIS Status Update - Mar 2019
As of March 15, a Draft EIS update is now available under the ‘Public Involvement’ tab. To view the update, click here.
EIS Timeline - Feb 2019
- Proponent submits revised Plan of Operations [Sep 2014]
- Federal Register Notice of Intent to prepare EIS [Mar 2016]
- Public scoping period and scoping meetings
[5 meetings between Mar-Jun 2016; comment period extended from 60 days to 120 days, closed Jul 18, 2016 ] - Compile and review existing data
- Prepare project description and identify project alternatives
- Publish Alternatives Evaluation Report [Sep 2017]
-
We Are HereValidate Baseline Information; analyze environmental effects
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Prepare Draft EIS
- Federal Register Notice of Availability of Draft EIS
- 90-day public review and comment period, with public meetings
- Respond to public comments and prepare Final EIS
- Federal Register Notice of Availability of Final EIS and Draft ROD
- 45-day Public Objection Period
- Resolve objections to Final EIS and draft ROD
- Issue Final Record of Decision
Forest Points of Contact
Media & General Info
John Scaggs
jscaggs@fs.fed.us
Project Manager
Resolution Copper
Mary Rasmussen
mcrasmussen@fs.fed.us
Apache Leap Special Management Area
Apache Leap SMA website