Electromagnetic Survey

In Electromagnetic (EM) surveys an electromagnetic field is induced that creates electrical current in the ground which can be measured as conductivity. Magnetic susceptibility is also recorded. Conductivity is comparable to an earth resistance area survey and the magnetic susceptibility is similar to magnetic survey. Standard EM equipment is able to record data at 3 different depths and can be used to identify buried alluvial channels, metallic features, areas of rubble, foundations and ditches.