Abstract
A continuation of the previous observations of the microtremors and microseisms were carried out along the two geological lines which are crossed transversely in the Nohbi plain, by use of the seismometer with 1-second and 5-seconds, the output of which is shunted by a condencer. The digitalized data are analyzed by the FFT method, and spectral forms of analytical results are not only compared with the soil layer thickness corresponding to 1300m in depth, but also discussed with a wave point of view. The horizontal component properties of the microseisms agree nearly with both the wave transfer properties of SH-wave and wave dispersion properties of Love wave. Also, the vertical component properties may be able to explain by Rayleigh wave.
