Modification of Ground Motions for Use in Central North America

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Existing procedures are used to modify available recorded ground motions to conform to realistic seismic hazard and regional soil conditions for Central North America. Site-specific bedrock ground motions were defined by spectrally-matching select recorded ground motions to conditional mean spectra (CMS) corresponding to a 1000-year return period. Soil profiles developed using existing soil data from the region are used to propagate the bedrock ground motions to the ground surface, for use in dynamic structural analysis. A suite of surface ground motions was developed for locations in southern Illinois; these ground motions are available in an online repository.

Original languageEnglish (US)
Pages (from-to)1385-1406
Number of pages22
JournalJournal of Earthquake Engineering
Issue number8
StatePublished - Sep 14 2019


  • Conditional Mean Spectrum
  • Dynamic Structural Analysis
  • Earthquake Response
  • Ground Motions
  • Uniform Hazard Response Spectrum

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality


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