Poroelastic. Subbottom source.
N C I J Z 
30 30 1 0
5
  0    0     0     0   0   0   0
  0 1500  -999.999 0   0   1   0 # SVP continuous at z = 30 m
 30 1480 -1490     0   0   1   0
100 -1 -1 0 0 0 0 0              # Cp<0 Cs<0 flag poro-elastic layer
1 2.25E9 .001 2.51 7.E9 .47 1.E-9 2.E-4 2.88E8 2.38E9 .5 .85 1.89
120 1600   400     0.2 0.5 1.8 0

120.1
0.1 150 51 25
1350 1E8
-1 1 950
0 5 20 1
20 80 12 10
0 150 12 25
30 90 3
0 2000 20 400
0 140 14 20