Offshore structural geologic mapping and development of a neotectonic model was performed for PG&E's nuclear Diablo Canyon Power Plant as part of the Long Term Seismic Program.

Approximately 130 square kilometers of high-resolution 3D, 120 line-kilometers of high resolution 2D and 65 line-kilometers of exploration 2D seismic survey were interpreted over a period of 4 months.  The transpressional Hosgri, Point Buchon and Eastern Point Buchon verical strike-slip faults, and several moderately northeast-dipping thrust fault systems are well-expressed in the seismic data and mapped with high confidence continuously across the study area. 

Cross-cutting relationships among strike-slip faults, thrust faults and folds show evidence of undeformed strike-slip faults offsetting the contractional structures, suggesting strike-slip faults are the dominant form of deformation within the study area.