An undisclosed underwater fault was recently uncovered in the vicinity of the Diablo Canyon Power Plant (DCPP) in California, thanks to a Cooperative Research and Development Agreement (CRADA) entered into with the Pacific Gas and Electric Company (PG&E). The DCPP, a substantial 2,300-megawatt nuclear power facility, has been in operation since 1985. This newfound fault's identification has necessitated a comprehensive characterization process to evaluate potential ground movements and associated risks to the power plant. The primary objective of the survey was to map the northern extent of the Shoreline Fault Zone and investigate its potential intersection with the Hosgri Fault Zone.