Fig. 16

Comparison with previous research results. a Is the comparison with the results of adjacent areas. The results of the present study are plotted by black solid circles. The error bar indicates the fitting deviation. The solid black line is the curve of \({Q}_{s}^{-1}\) versus frequency obtained in this study. The blue crosses, green squares, yellow diamonds, bright blue pentagrams, magenta hexagrams and red stars show the \({Q}_{s}^{-1}\) value of BS station, YS station, LJ station, HQ station, YM station and LQ station, respectively (Wang et al. 2005). b Is a comparison of the power law decaying model for \({Q}_{s}^{-1}\) in different areas and rock types. The black solid line is the result for our study. The orange solid line, green solid line and green dash line show the result in the Kanto area (Yoshimoto et al. 1993), in the focal region and outside the focal region (Mamada and Takenaka 2004), respectively. The magenta line, blue solid line and blue dash line are the \({Q}_{s}^{-1}\) model for shallow structure of soft soil, hard soil and sedimentary rock (Satoh 2006). The red dash line indicates the decaying model in the North China Basin (Wang and Li 2018)