Application of wavelet analysis to seismic signals

The squared modulus of the wavelet transform called the scalogram is used for decomposing the seismic signal energy into the time-scaling plane. For better representation the scale is converted into frequency. The seismic signals are obtained from hitting a metal sphere against the lawn. After a number of experiments, both the mean value of the energy center frequencies and standard deviation are found and given in terms of the distance between the detector and place of excitation. Both functions decrease if the distance increases, so it is possible to estimate the distance using only one detector. These results are useful for seismic signal analysis when several excitations occur. This is demonstrated in experiments in which seismic signals are obtained from the two excitations.