The attenuation parameters Q and n in the frequency range of 1-12Hz was studied. The single isotropic scattering model was applied in the analysis of coda waves using seismic data of small local events. The slope of the coda envelope and the mean Qc with respect to lapse time and frequency dependence was estimated in two stations which belong to the VOLNET seismological network, operating in central Greece. The seismological stations are situated in two regions characterized by different geological and neotectonic features. The clear frequency dependence of Qc follows the power law relation Qc=Qo f n. The Qo values were found ranging from 32 to 108 and n from 1.06 to 0.65 for 10s to 40 s lapse time window at the Erythres station and from 25 to 70 and 1.08 to 0.94 at the Pavliani station for the same lapse time window. The difference, of the attenuation parameters Qo and n values, between the two examined areas were interpreted in terms of different scattering environments present in the two investigated areas. The age of geological formation and their folding grade seem to be important factors in this interpretation.