TABLE 1.  Northridge Regional Velocity Structure

                          A)  ROCK STATIONS
            ----------------------------------------------
               Vp      Vs      Density   Thickness   Depth  
	    (km/s)   (km/s)    (g/cm )     (km)      (km) 
            ----------------------------------------------
              1.9      1.0       2.1       0.5        0.0

              4.0      2.0       2.4       1.0        0.5

              5.5      3.2       2.7       2.5        1.5
  
              6.3      3.6       2.8      23.0        4.0

              6.8      3.9       2.9      13.0       27.0

              7.8      4.5       3.3                 40.0
            ----------------------------------------------

                          B)  SOIL STATIONS
            ----------------------------------------------
               Vp      Vs      Density   Thickness   Depth  
	    (km/s)   (km/s)    (g/cm )     (km)      (km) 
            ----------------------------------------------
              0.8      0.3       1.7       0.1        0.0
              1.2      0.5       1.8       0.2        0.1
              1.9      1.0       2.1       0.2        0.3

              4.0      2.0       2.4       1.0        0.5

              5.5      3.2       2.7       2.5        1.5
  
              6.3      3.6       2.8      23.0        4.0

              6.8      3.9       2.9      13.0       27.0

              7.8      4.5       3.3                 40.0
            ----------------------------------------------