Study of the wave structure of moving continuous seismic sources

A field experiment is used to demonstrate the possibility of determining th e seismic wave structure of a moving sonic source. The source is an airborn e acoustic radiator. The wave-type discrimination is shown to be based on t he Doppler effect, which results in different splitting scales of harmonic components of different wave types. For comparison, the seismic wave struct ure from a fixed source is studied. In this case, wave types are determined using a linear antenna array as a receiver and applying the spectral analy sis to the spatial structure of the seismic signals.