Fig. 5

Fast Fourier Transformations (FFTs) for the 4 significant Rayleigh test sites. Left panel shows detrended time series for each receiver site, right panel shows the dominant frequency extracted from each time series.

Fast Fourier Transformations (FFTs) for the 4 significant Rayleigh test sites. Left panel shows detrended time series for each receiver site, right panel shows the dominant frequency extracted from each time series.