安徽地区尾波Q(下标 c)值特征研究

Based on digital waveform data of M(subscript L)2.3 earthquakes recorded by Anhui digital seismic network, the Q(subscript c) value of the medium below seismic stations in Anhui area is calculated using the Sato single scattering model. The results show that the Q(subscript c) value is inhomogeneous and much lower in Huoshan area. The formula for the relationship between Q(subscript c) value and frequency in Anhui area is determined using curve fitting, which isQ(subscript c) (104.9±36.4)f(superscript (0.85±0.08)). Particularly, the Q(subscript c) value of Huoshan earthquake swarm sequences occurred from February to December of 2009 is calculated and analyzed, which shows significant difference between before and after the main shock.