California Institute of Technology, Pasadena, CA 1976 Ph.D. Geophysics
California Institute of Technology, Pasadena, CA 1974 M.S.  Geophysics
Case Western Reserve University, Cleveland, OH 1972 B.S.   Geology

Director for Research, CERI 2005
Professor of Seismology and Earth Structure, University of Memphis, CERI 2001
Distinguished Visiting Professor, University of Memphis, CERI  2000-2001
Professor, Pennsylvania State University    1986-2001
Associate Professor, Pennsylvania State University   1982-1986
Assistant Professor, Pennsylvania State University   1977-1982
Research Fellow, California Institute of Technology   1976-1977

Significant Professional Activities

Member – American Geophysical Union, Seismological Society of America, Geological Society of America
President of Seismological Society of America 1990
Editor for the Bulletin (SSA) 1992 – 1995
Chair, Executive Committee of the Eastern Section of the SSA 2005
Fellow of the American Geophysical Union 2003
Member of Red Team on the Verifiability of the Comprehensive Ban Treaty, Arms Control and Disarmament Agency, 1997
Member of the Committee on Seismology, Commission on Geosciences, Environment, and Resources, National Research Council 1991-1997
Chair of the NSF Visiting Committee for the Southern California Earthquake Center