Figure 4. Plots showing the scattered relationship of peak particle velocities to various expressions of yield. (a) Peak P-wave particle velocity on the vertical component in the 4–8-Hz band as a function of total explosive yield. (b) Peak P-wave particle velocity on the vertical component in the 4–8-Hz band as a function of average explosive per borehole. (c) Peak Rg/Lg particle velocity on the verticle component in the 4–8-Hz band as a function of average explosive per borehole. (d) Peak P-wave particle velocity on the vertical component in the 4–8-Hz band as a function of average spalled mass per borehole.