A procedure is described which, it is thought, affords the fullest and most balanced description of earthquake risk that may be derived from available information. In this hybrid method, earthquake risk in the vicinity of active faults is derived in a semi-deterministic manner, while in other areas it is derived assuming a completely random distribution of seismicity. An explicitly probabilistic approach was adopted in order that predicted accelerations for earthquakes occurring both randomly and along known faults would have a comparable probability of occurrence. Thus, while spatial probability density was allowed to vary, probability of occurrence in time was held at a constant level across the study region. Pre-cenozoic history is outlined and cenozoic tectonic-volcanic evolution, crustal structure and seismicity are reviewed. Late quaternary faulting and seismicity is covered and methods of analysis and interpretation of data are detailed. The maximum probable acceleration in bedrock is considered together with methods of analysis.

  • Corporate Authors:

    Idaho Transportation Department

    Division of Highways, P.O. Box 7129, 3211 State Street
    Boise, ID  United States  83707
  • Authors:
    • Greensfelder, R W
  • Publication Date: 1976-8

Media Info

  • Features: Figures; Tables;
  • Pagination: 69 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00157261
  • Record Type: Publication
  • Report/Paper Numbers: Research Project 79
  • Created Date: Nov 23 1977 12:00AM