D. A. Okaya R.W. Clayton W. J. Lutter T. Ryberg T.M. Brocher T.M. Henyey M.L. Benthien P.M. Davis J. Mori R. D. Catchings Uri S. ten Brink M.D. Kohler Kim D. Klitgord R. G. Bohannon G. S. Fuis 1996 <p><span>The Whittier Narrows earthquake of 1987 and the Northridge earthquake of 1991 highlighted the earthquake hazards associated with buried faults in the Los Angeles region. A more thorough knowledge of the subsurface structure of southern California is needed to reveal these and other buried faults and to aid us in understanding how the earthquake-producing machinery works in this region.</span></p> application/pdf 10.1029/96EO00112 en Images of crust beneath southern California will aid study of earthquakes and their effects article