Relations between Charge Amounts and Periods in Resulting Seismic Wave Groups.

Abstract

Variations of periods in superficial seismic waves were observed with various charge amounts. Those seismic waves were considered to be the zeroth and the first orders of RAYLEIGH and SEZAWA-waves respectively, due to the superficial layer in the experimental ground. Each period was found to have its own asymptotic value which was seen to satisfy the quarter wave-length law discussed previously by the present author. Frequency characteristics at the origin of seismic waves were also considered.