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Earth, Planets and Space
Fig. 16 | Earth, Planets and Space

Fig. 16

From: Difference of horizontal-to-vertical spectral ratios of observed earthquakes and microtremors and its application to S-wave velocity inversion based on the diffuse field concept

Fig. 16

Best-fit model (red line) in comparison with the observed MHVR (black line) in the left panel, convergence with respect to the generation in the middle panel, and shallow (< 50 m) and deep (< 3 km) parts of the obtained S-wave velocities at EHM012 in the two right panels. Blue lines are those for ten trials with different genes, while red lines are values of the best model. Green lines in the two right panels are S-wave velocities of the initial model. We should note that here we used the formula for earthquake (i.e., Eq. 3), not for microtremors

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