Seismic Measurements for Detecting Underground High-contrast Voids

Active seismic technology has been widely utilized for imaging and characterizing the<br>subsurface of the earth. Its greatest success and most publicized application has been in the exploration<br>and exploitation of oil and gas resources. The technology has also been applied in near surface<br>situations in the field of groundwater resource management, and geoenvironmental and civil<br>engineering.