Abstract
In Part 1, we showed that the time variation of the velocity of seismic wave was connected with Hayakawa's theory by our method. But in a few cases, this relation seems to be reversed, and in much more cases we cannot find any clear relation, probably owing to the complicated conditions in the earth's crust there. If the part of the path across the compression area a_??_d dilation area of the intermediate shocks has the same order of length, the condition becomes more difficult. Some examples of pattern in such cases are considered theoretically and compared with actual cases with fairly good agreement.
