RES2020-25: Development of a New Attenuation Model for West Tennessee

The main objective of this study was to determine seismological parameters in Central and Eastern North America (CENA), including constraints on the geometrical spreading, anelastic attenuation, stress parameters, and site attenuation parameters (kappa). To determine the seismological parameters, the recently developed and published Ground Motion Models (GMMs) for the NGA-East were used. In addition to the main objective, as part of this study, three new ground-motion models (GMMs) were developed: (1) a new model for vertical to horizontal response spectral ratios for central and eastern North America; (2) a ground-motion prediction model for smallto-moderate induced earthquakes for central and eastern United States; and (3) a ground motion model for the Gulf Coast region of the United States, which includes part of West Tennessee. These three GMMs are presented as supplementary material to this report We used a genetic algorithm (GA) to invert weighted geometric mean estimates of horizontal response-spectral acceleration from the empirical NGA-East ground-motion models to successfully estimate a consistent set of seismological parameters that can be used along with an equivalent point-source stochastic model to mimic the general scaling characteristics of these ground-motion models. The inversion is performed for events of M 4 – 8.0, RRUP = 1 to 300 km, T = 0.01 – 10 sec (f = 0.1 – 10 Hz). This study is the first to perform a formal inversion using the extensive and peer-reviewed CENA GMMs developed for the NGA-East project and using a formal GA approach. The approach was validated by using simulated small-to-moderate magnitude and large-magnitude data derived from the NGA-West2 GMMs (Zandieh et al., 2016, 2018; Pezeshk et al., 2015).


  • English


  • Status: Completed
  • Funding: $134955
  • Contract Numbers:



  • Sponsor Organizations:

    Tennessee Department of Transportation

    James K. Polk Building
    Fifth and Deaderick Street
    Nashville, TN  United States  37243-0349
  • Managing Organizations:

    University of Memphis

    Memphis, TN  United States 
  • Project Managers:

    Flores, Ty

  • Performing Organizations:

    University of Memphis

    Memphis, TN  United States 
  • Principal Investigators:

    Pezeshk, Shahram

  • Start Date: 20190801
  • Expected Completion Date: 20220228
  • Actual Completion Date: 0
  • USDOT Program: Transportation, Planning, Research, and Development

Subject/Index Terms

Filing Info

  • Accession Number: 01744430
  • Record Type: Research project
  • Source Agency: Tennessee Department of Transportation
  • Contract Numbers: RES202025, 4010007219
  • Files: RIP, STATEDOT
  • Created Date: Jun 29 2020 6:12PM