Systems and methods for detecting a subsurface cavity. A source applies a force to ground under inspection and a plurality of sensors coupled to the ground detect resulting surface waves. A processor is configured to extract phase and frequency components of the acquired seismic data, identify a phase shift in surface waves in the ground under inspection based on the extracted phase and frequency components, and determine one or more physical characteristics of a subsurface cavity based on the identified phase shift
P. Hajiani et al., "Spectral Analysis of Surface Waves to Detect Subsurface Voids," U.S. Patents, Apr 2018.
Geosciences and Geological and Petroleum Engineering
Patent Application Number
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12 Apr 2018