The study of site responses of Yunnan digital network of area seismic stations

Using the H/V spectral ratios method,the characteristics of the site response changed with frequency of tail waves of twenty-three stations in Yunnan area are calculated.The results indicate that the site response is relatively smooth in the frequencies of 1 to 10 Hz,and the tail wave site response of the twenty-three substations is changing between 1.37 and 3.59,and its average value is 2.05.The site responses of some stations are obviously magnified at a high frequency(≥10 Hz).The above cognition is helpful to the study of earthquake wave in Yunnan.