FIELD: seismology.
SUBSTANCE: method includes excitation of resilient waves and registering three-dimensional seismogram. Adjustable directional adding of seismogram channels is performed along two orthogonal directions with selection of regular waves and calculation of their beam parameters, which are used to determine planes, touching surface hodographs of each wave. Adding of each separated wave is performed along touching plane with increasing aperture and concurrent control of amplitude of total signal, maximum of which is used to determine radius of first Fresnel zone on three-dimensional seismogram. Effective speed of wave expansion is calculated.
EFFECT: higher precision.
4 dwg
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