The fifth annual meeting of the Canadian Geophysical Union was held at the University of Western Ontario, London, Canada, on May 15–17, 1978. The four previous meetings of the Union were held in conjunction with either the Geological Association of Canada or the Canadian Association of Physicists, since the CGU is a division of both of these parent organizations. At the previous meetings the CGU typically sponsored two or three sessions on geophysics as part of a program with either a dominant geology or physics flavor.
With a membership of less than 300 and many specialized conferences competing for geophysicists' time and conference money it was with some trepidation that the CGU decided to try a meeting on its own. Ten technical sessions were proposed and 133 abstracts of papers were received, which necessitated the creation of an additional half-day session in paleomagnetism and rock magnetism; 224 registered participants attended one or more days of the meetings.