A Trial Analysis in the Estimation of the Underground Structure by Dispersed Surface Waves

The present paper describes a trial analysis in the estimation of the underground structure by dispersed surface waves. The estimations of the shallower undergound structure have been investigated by a few seismologists by means of dispersed surface waves. In this paper the dispersed surface waves were analysed by means of Fourier transform (SATO, 1955). Assuming that the wave forms generated by a small explosion were approximately sinusoidal curves, the numerical integration of Fourier transform was tried to be calculated. As the result, the difference of depth was shown. It seems that the causes for the errors in this trial analysis are in the previous assumption and in reading the amplitudes and time intervals. These points will be discussed in future