The Spectral Decay Parameter ? (kappa) for the near Site Events in Van Region

Abstract

The spectral decay parameter ? (kappa) is increasingly used in many applications since it is first introduced by Anderson and Hough (1984) and basically measures the decay of high-frequency ground motion amplitudes for each ground motion acceleration time history record at one location. During the past years, multiple approaches were developed for its estimation and effect on seismic hazard calculations, where it was observed that ? can have an impact in terms of 3 to 6 times increased seismic hazard values for high-frequency ground motions depending on the site conditions. In this study, the strong ground motion recordings from the Disaster and Emergency Management Authority (AFAD) stations in Van region are taken into account for ? evaluations. © 2023 Elsevier B.V., All rights reserved.