resonance scattering analysis of at least 3 - component vsp data detects heterogeneities in the proximity of a borehole . a method for seismic exploration of a pre - determined volume of the earth for assessing features of the volume using at least 3 - c vsp data generated for the volume comprises : computing a resonance spectra indicating resonance scattering of the at least 3 - c vsp data ; and determining a lateral continuity of said features in accordance with the resonance spectra . zero amplitude in a resonance spectrum indicates definite polarization of the direct pressure wave into the ray direction and very weak lateral heterogeneity along the path of the direct wave . high amplitudes in a resonance spectrum are observed if energy of the direct wave is observed on the horizontal components due to scattering at small - scale lateral heterogeneities near the receiver . peak frequency provides information on the size and location of the scattering structure .