TY - SER AU - Bozorgnia, Yousef AU - Idriss, I.M. AU - Abrahamson, Norman A. AU - Campbeli, Kenneth W TI - Damping Scaling Factors for Elastic Response Spectra for Shaliow Crustal Earthquakes in Active Tectonic Regions: "Average" Horizontal Component KW - Damping Factor KW - Elastic Response KW - Spectral Analysis ER -