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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Application of a simplified calculation for full-wave microtremor H/V spectral ratio based on the diffuse field approximation to identify underground velocity structures

Fig. 4

H/Vs, imaginary parts of the Green’s function in the vertical component and vertical medium responses of Rayleigh waves from fundamental mode to fifth higher mode. Left: FW H/V (thick black) for target two-layered medium (V s2 = 8V s1), and SW H/V (red) for cap-layered medium (V sCap = 2V s2, Depth = 10λ 0). Middle: imaginary parts of the Green’s function of FW (thick black) in the vertical component for target two-layered medium and that of SW (red) for cap-layered medium. Right: vertical medium responses of Rayleigh waves for fundamental mode (black), first higher mode (red), second higher mode (blue), third higher mode (cyan), fourth higher mode (thin black), and fifth higher mode (purple)

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