Contrasts Between Short- and Long-Term Records of Seismicity in the Rio Grande Rift – Important Implications for Seismic Hazard Assessments in Areas of Slow Extension
The Rio Grande rift has a relatively short and unimpressive record of historical seismicity. However there is abundance evidence of prehistoric (Quaternary) surface faulting associated with large (M>6) earthquakes. This paradox between historical and prehistoric seismicity (paleoseismicity) has important implications for seismic-hazards analyses based primarily on modern seismicity.
Machette, M.N., 1998, Contrasts between short- and long-term records of seismicity in the Rio Grande rift – Important implications for seismic hazard assessments in areas of slow extension, in W.R. Lund (ed.), Western States Seismic Policy Council Proceedings Volume, Basin and Range Province Seismic Hazards Summit, Utah Geological Survey Miscellaneous Publication 98-2, p. 84-95.
Email Address Created for Land Exchange Questions
The Southwestern Region Office of Lands and Minerals Management is overseeing and administering the land exchange and appraisal process which includes the 2,422-acre Oak Flat Federal Parcel. All questions about the land exchange and appraisal process should be emailed to SM.FS.firstname.lastname@example.org
Programmatic Agreement Info
To comply with Section 106 of the National Historic Preservation Act, the Tonto National Forest developed a Programmatic Agreement (PA) and included it in Volume 5, Appendix O of the final EIS. The PA was created in cooperation with the Advisory Council on Historic Preservation, the State Historic Preservation Office, tribes and other consulting parties. The PA contains an agreed upon process for identifying, evaluating and addressing adverse effects to historic properties associated with this undertaking.
To review Volume 5 and the PA, Download Vol 5 PDF, 27 MB.