Distribution Characteristics of Coda Wave Q₀Value in Shanghai Area Based on the Sato Model

Digital seismic event data within 50 km of Shanghai and its surrounding areas recorded by the Shanghai network from 2011 to 2017 were used to calculate the tail wave Q₀value of seismic code at 5 seismic stations in Dongtan, Dayangshan, Sheshan, Tianpingshan, Qinhuangshan based on the Sato model. The results Show that the Q₀values of Shanghai and its surrounding areas generally show a high west and low east distribution, Q₀value is lower in the eastern coastal areas and higher in the Puxi area. According to the seismic event records of Shanghai network, it is found that although the earthquakes in Shanghai area are generally distributed diffusedly, there is no trend of distribution along the faults, there are more seismic events in the eastern coastal areas and the sea areas than in the Puxi area. By comparing the seismic event records of Shanghai network databases with the Q₀value of seismic code, the results Q₀values of seismic coda reflects the seismicity characteristics in Shanghai area.