برآورد پارامترهای لرزه ای محیط و چشمه زمینلرزه بم (2003)

In the study, the strong motion records are used to obtain an estimate of source parameters, high frequency attenuation and spectral decay parameter for 9 station from 23 stations that is S/N rate good. The source parameters are obtained by fitting the data by a dislocation source model combined with an exponential model for the attenuation. The source parameter estimated here ( = 5.88*1025 , = 4.04 , Δ = 35 , Δ = 44 , = 3sec d Mo bar r km u cm σ bar T ) and estimated moment magnitude M = 6.5 w agree well with values obtained previously from Harvard university by CMT method. Estimates of path averaged crustal shear wave quality factors give results in the rang 77 to 730, and mean of spectral decay parameters kappa= 0.08 sec for two horizontal components

Keywords:

پارامترهای چشمه , فاکتور کیفیت , پارامتر افت طیفی , روش طیفی چشمه , بم