James N. Brune earned a doctorate in geophysics from Columbia University in 1961. After stints at the California Institute of Technology and the University of California's Scripps Institution of Oceanography, he moved in 1987 to the University of Nevada, Reno, where he remains on the faculty. Address: Mackay Seismological Lab, MS 174, University of Nevada, Reno, Nevada 89557. Internet: www.seismo.unr.edu/PrecRock