1986-87

Sep 18: 'A Forefront for Effective Seismic Exploration' - Carl Savit, Western Geophysics (substituted for Norman Neidel, SEG Distinguished Lecturer)

Oct 16: 'Sources of Glacial Detritus and Applications to Mineral Resource Evaluation' - George C. Stevens, USGS

Nov 20: 'The Eruption of Nevado del Ruiz Volcano, Columbia' - Darrel G. Herd, U.S. Geological Survey

Dec 18: 'The Role of Earth Science in Solving the Indoor Radon Problem' - Allen B. Tanner, USGS

1987

Jan 15: 'Recent Developments in Space Geodynamics' - Edward A. Flynn, NASA

Feb 19: 'New Provisions of the Superfund' - Eric L. Butler, Office of Technology Assessment, U.S. Congress

Mar 19: 'Evolution of the Mendocino Triple Junction (California)' - Stewart W. Smith, Incorporated Research Institutions for Seismology, Arlington, Va.

Apr 16: 'Long Valley Earthquake (California), Magmatic Sequence' - Alan S. Ryall, Jr., Center for Seismic Studies, Arlington, Va.

May 14: 'Distribution of Crust and Early History, Gulf of Mexico Basin' - Richard T. Buffler, National Science Foundation