Field computer setup to collect a Multichannel Analysis of Surface Waves (MASW) survey. The field computer is connected to a Geometrics Geode (yellow box). The seismic array consisted of 72 geophones at 4.5 Hz that were spaced at 1-meter intervals. Matthew Glover, a geophysicist with the U.S. Army Corps of Engineers St. Louis District, is participating in the U.S. Army Engineer Research and Development Center’s ERDC University to develop a broader understanding of shallow seismic exploration and its application as a tool for delineation and risk management. (U.S. Army Corps of Engineers photo