Based on the behaviours of that the index of geometrical diffusivity n which is indicator of the type of earthquake source and absorptive co efficient α/km² in near field are varied with real earthquake, a complete macro seismic formula for the determination of hypocentral depth can be derived as follows:
h=r_i/[10(I₀-I_i)/(1.5n)e^-2T_ri2-1]^1/2
in which h is hypocentral depth, I₀ the intensity at epicenter, r_i the radus of isoseismal curves defined by intensity I_i. For this formula and macroseismic formula mentioned in previous paper, three calculative methods are given respectively and their results are very good.