· President, AGU Natural Hazards Focus Group, American Geophysical Union2017–
· President Elect, AGU Natural Hazards Focus Group, AGU2015–2016
· Professor, Chapman University2009–
· Professor, George Mason University2007–2009
· Distinguished Visiting Professor, George Mason University2003–2005
· Professor, IIT Kanpur1986–2007
· Professor, Indian Institute of Technology Kanpur1986–2007
· AOSTRA Fellow, University of Alberta, Edmonton1981–1986
· Ph.D., Geophysics, Banaras Hindu University1978–1980
· Research Fellow, National Geophysical Res. Institute, Hyderabad1976–1977
· 1976, geophysics, Banaras Hindu University1974–1976
· M.Sc., Geophysics, Banaras Hindu University1974–1977
· BS, MS and Ph.D., Geophysics, Banaras Hindu University1970–1980