Figure 9 - Example of Pn/Sn discrimination analysis for the 4-6 Hz band at KEV. (a) shows the uncorrected ratios-versus- mb trend, (b) shows the ratio-distance trend found using only earthquake ratios, and (c) shows the final discrimination plot.
Figure 10 - Distance-corrected ratio-versus-m discrimination plots for the 5-7 and 6-8 Hz bands. The label Mahalanobis refers to Mahalanobis Distance, a measure of separation between earthquake and explosion populations and the scatter within each population Note that the 16 August event moves into the earthquake population as frequency increases.
Table 2 - Events Used for Discrimination Analysis at KEV