estimation of the quality factor and source parameters of west of iran from acceleration spectra of the tazehabad-kermanshah earthquake 2018

Strong earthquakes occurred on the 26th of august 2018 (mw 5.9) in the kermanshah province, west of iran. high-frequency strong-motion data of this earthquake has been analyzed to determine the source parameters and qβ(f) by inversion of the recorded data. we have used the data from a local network of 26 acceleration records for the main shocks to estimate q-relationship in 26 stations. the seismic hazard map for this region illustrates that most of the area in this province is located within high relative risk and characterized by a large number of heterogeneities. for frequency band of 1 to 20 hz, the frequency-dependent attenuation for this region found to be qβ(f)=(101±19)f (0.76±0.05). the authenticity of achieved qβ(f) relation is checked by comparing the source spectra in various stations with the theoretical spectra. low values of the coefficient (q<200) in the qβ(f) relation suggest that the region is seismically and tectonically active.