Open-File Report 2007–1406
Near-surface seismic surveys often employ hammer impacts to create seismic energy. Shear-wave surveys using horizontally polarized waves require horizontal hammer impacts against a rigid object (the source) that is coupled to the ground surface. I have designed, built, and tested a source made out of aluminum and equipped with spikes to improve coupling. The source is effective in a variety of settings, and it is relatively simple and inexpensive to build.
Posted December 2007
Haines, S. S., 2007, A Hammer-impact, aluminum, shear-wave seismic source, U.S. Geological Survey Open-File Report 2007-1406, 5 p.