Global Geophysical builds its business from the ground down. The company provides seismic data acquisition services to the oil and gas industry for locating potential reservoirs and studying known reserves. Global Geophysical transmits sound waves below the earth's surface to create two- and three-dimensional images of the existing subsurface geology. The firm's seismic crews work in a wide variety of terrains, including deserts, jungles, mountains, and swamps, and have completed projects in more than 100 countries, including Algeria, Argentina, Chile, Colombia, Georgia, India, Iraq, Mexico, Oman, Peru, and Uganda. In 2009 the company filed for an IPO.