The failure of crater scaling from conventional to nuclear explosions is believea to result bots from tne enormous disparity in energy release (and tois also applies pvetween kiloton and megaton nuclear explosions) and also from tne importan~ difference in energy partition in the two types of explosions. In general it is Known tnat the dimensions of the crater (radius or depth) are affected or determined by the total energy release, the depth of the cnarge and the cnaracter of the medium (earth) in which the charge is fired. If these parameters operate independently, then one could write an empirical equa*ion in the form R= f(Wo. (DJ! . f(m) R= f(Wo "(D,! * f(m) or in the form 7 wnere R is tne radius Wis related to energy release,energy density, and detonation velocity D,. is the depth of tne charge mis related to the medium. In this case tne separate contrib.tion of each of the parameters can be determined easily. If, nowever, ‘ne parameters are interdependent it is necessary to use the form R =c(W. DL, a) and the effect of varying any one of the parameters is much more complicated because it depends on ti.e velues at whicn the other parameters are maintained. There is general agreement among investigators that the parameters affecting craters are in fact extensively interrelated. The universal use of scaling concepts, particularly in regard to the scaled depth of charge is evidence in point. Thu:, in regard to the effect of energy release and deptn of cnarge a sat: sfactory form for the equation is R= f(W . *(W, L,), or aS a more specific example, where k is approximately 3. Tne :nclusion of an additional term to represent tue effect or different mediums could be in several forms,