Abstract: Based on single scatter model, using earthquake waveform data recorded by Jiangsu earthquake networks, coda wave Q values in Jiangsu area was calculated. The results show that, Q values in Jiangsu area is high overall, but there exist obvious differences in different areas. The Q value in the south is higher than the north. We respectively studied four areas where seismic stations are relatively intensive, the character of geological structure is evident and coda wave Q₀ is relatively focused, and obtained the characteristic relationships between Q values and frequency of the four areas in Jiangsu. Q value in the south of Jiangsu to Maoshan fault zone is much higher than other areas, and Q value is lower in the central part of Jiangsu to the coastal areas. Q value is in the middle level in the north and in the neighbourhood of Lianyungang. Comparing tectonic and earthquake activities in the four areas shows that there is a relationship among Q values, crustal movement and earthquake activity.

Key words: Coda wave Q value, Attenuation, Single scatter model, Jiangsu area