L-36 STOCHASTIC STRUCTURAL MODELING IN HAVANA L. HOLDEN 1 B. F. NIELSEN 1 A. VAZQUEZ 1 and C. TOWNSEND 2 Summary 1 The Havana program can be used to model both large faults that are visible on seismic images and small faults for which there is only indirect evidence. Each fault is modeled individually using complex and flexible models for the large faults and simpler models for the small faults. Not only the geometry of the fault plane is modeled but also the actual rock movement and deformation causing the fault. This latter property of the fault model is the