The Australian Society of Exploration Geophysicists (ASEG) and Petroleum Exploration Society of Australia (PESA) invite you to participate in the 20th International Geophysical Conference and Exhibition to be held in Adelaide, South Australia during 22-25 February 2009. The conference theme reflects not only changes in the natural environment but also the challenges facing the geoscientific community as we strive to operate with ever changing expectations and targets. The collaboration of two of Australia’s premier geoscientific bodies promises to make this conference a stand out forum for resource exploration geophysics community.