Geophysics (solid earth) for his outstanding contribution to our knowledge of the Earth’s deep interior. See also Backus–Gilbert method List of geophysicists References External links J. Freeman Gilbert Biography Project IDA (International Deployment of Accelerometers) 1981 The Gold Medal (A) The Society's highest honour 1985 The Arthur L. Day Medal 1990 Balzan Prize Winner J. Freeman Gilbert Receives 1999 William Bowie Medal 2004 The Harry Fielding Reid Medal of the Seismological Society of America Obituary 1931 births 2014 deaths People from Vincennes, Indiana American geophysicists Linear algebraists Massachusetts Institute of Technology School of Science alumni University of California, San Diego faculty University of California, Los Angeles faculty Members of the United States National Academy of Sciences Recipients of the Gold Medal of the Royal Astronomical Society Road incident deaths in Oregon