Development of experimental methods in electroseismics

The electroseismic method offers the possibility of imaging thin (much smaller than the seismic wavelength) layers in the subsurface. We have collected electroseismic data in the field using a standard seismograph outfitted with electrode pairs rather than geophones, and a sledge hammer and other seismic sources. Removal of coherent source-generated noise is an essential step in the processing of electroseismic data. We accomplish this signal/noise separation using prediction-error filters (PEF’s) in an iterative inversion scheme. Using these methods, we image a shallow known target in a controlled setting.