Fig. 2: The eigenfrequency-volume abacus.
From: Fast estimation of landslide blocks’ volume from seismic noise measurements

a Linear and b logarithmic scale of the eigenfrequency-volume abacus. The trend of the average of the horizontal fundamental frequency is shown as a function of the volume, given a fixed surface area (black curves) or a fixed height (teal curves). The grey dots represent the simulation results (see Section ‘Vibration modal analysis of a single block constrained at the base’ for the parameters employed in the simulations) used for the regression. The dashed lines represent the extrapolated trends.