1973
Feb 14: - Birth of PGS: Organizing Session at U.S. Geological Survey, GSA Building, Washington, DC
Burl Tuller, Founder, first president
Mar 8: 'Seismic Data Analysis Center' - William C. Dean, Teledyne Geotech
Apr 26: 'Geologic Implications of Plate Tectonics' - M.C. Blake Jr., U.S. Geological Survey
May 24: 'The USGS Program in Geothermal Energy Research' - Gordon Eaton, USGS