The San Simeon-Hosgri Fault is an approximately 140 km long, complex thrust or reverse fault that runs offshore, with an 18 km section that is on land. The fault has an almost north-south strike and east dip. It is a system of interlaced and parallel faults that form this structure. It lies sub-parallel to the San Andreas Fault and is part of a system of faults that accommodate motion between the North American and Pacific Plate. The fault poses a hazard to the Diablo Canyon Power Plant, which sits a few kilometers from the fault. Following the Fukushima Daichi nuclear accident, caused by an earthquake, there have been concerns of a nuclear disaster involving the power plant. The onshore San Simeon Fault triggered the 2003 earthquake that killed two people.