Norm Abrahamson is an Engineering Seismologist at Pacific Gas & Electric Co., being responsible for developing ground motion for seismic evaluations of PG&E facilities including nuclear power plants, nuclear waster storage, dams, penstocks, electric substations, office buildings, and gas pipelines. He is also responsible for the technical management of the PG&E seismic research program funded through the Pacific Earthquake Engineering Research Center (PEER) at UC Berkeley. Dr. Abrahamson has been involved in strong motion seismology for 17 years. His work has included studies of empirical attenuation relations, probabilistic seismic hazard, uncertainty of numerical ground motion predictions, long period strong ground motions, generation of spectrum compatible time histories, generation of multiple support time histories, spatial variation of strong ground motions over short distances, source rupture properties.


  • Rodriguez-Marek, A., Bray, J.D.; Abrahamson, N.A. [2001] "An empirical geotechnical seismic site response procedure", Earthquake Spectra, Vol. 17, No. 1, pp. 65-87.
  • Abrahamson, N.A. [2000] "Effects of rupture directivity on probabilistic seismic hazard analysis", Proceedings of the Sixth International Conference on Seismic Zonation, Earthquake Engineering Research Inst., Oakland, California.
  • Abrahamson, N.A. [2000] "Treatment of variability and uncertainty in numerical and empirical methods for ground motion estimation", Proceedings of the Second U.S.-Japan Workshop on Performance-Based Earthquake Engineering Methodology for Reinforced Concrete Building Structures, Sapporo, Japan, pp. 63-73.
  • Abrahamson, N.A. [2000] "Near-fault ground motions from the 1999 Chi-Chi earthquake", Proceedings of the U.S.-Japan Workshop on the Effects of Near-Field Earthquake Shaking, San Francisco, California, pp. 11-13.
  • Idriss, I.M. and Abrahamson, N.A.[2001] "Geotechnical aspects of the earthquake ground motions recorded during the 1999 Chi-Chi earthquake", Proceedings of International Workshop on Annual Commemoration of Chi-Chi Earthquake, National Center for Research on Earthquake Engineering, Taipei, Taiwan, Vol. 3, pp. 9-22.