AGU member since 1982. Professor, University of Rochester. My primary area of interest is the process of continental rifting leading to breakup and the formation of oceanic spreading ridges using potential fields and seismic methods. Recent projects include seismicity and structural analyses of the East African rift system in Ethiopia (Projects AFAR, EAGLE) and local and teleseismic studies of lithospheric structure beneath the Gulf of Aden (ENCENSII). B.S., Duke University, 1982; S.M., Massachusetts Institute of Technology, Geophysics, 1986; Ph.D., MIT/WHOI Joint Program in Oceanography, 1988. National Research Council and NATO Postdoctoral fellowships at NASA Goddard Space Flight Center and Leeds, respectively; Lecturer at Leeds University, 1991–1998; Reader, Professor at Royal Holloway, 1999–2006; Professor at University of Rochester since 2006. Member of Royal Astronomical Society, Geological Society of America. Editor-in-Chief, Geophysical Journal International; US MARGINS committee member. Author or coauthor of 70 refereed papers, 13 in AGU journals; Fellow, Geological Society of America; 2004 British Geophysical Association Bullerwell Lecturer. Former Chair of AGU Regional Advisory Committee-Europe, AGU Tectonophysics Section Secretary, 2002–2004; Former Associate Editor, JGR-Solid Earth.