چكيده لاتين :
The strong ground motions recorded during the 2002 Avaj earthquake have been used to estimate S wave attenuation, Qbeta, and spectral decay parameter, ê, for the Avaj region. Qbeta for shear wave is estimated as a function of frequency in the range of 0.6- 18 Hz. The results show that Qbeta increases with frequency in the form of Qbeta=62.7 f ^0.9. Our estimates are within the estimated range for different parts of the world for Qo and n. The spectral decay parameter, ê, has been estimated from the high frequency of the spectra. The dependence of ê on the epicenteral distance for the Avaj region is also found
