San Andrea's fault is a geographically complex fault and is a result of the continental transform occurs along with the 1,200 along California. And forms a transform boundary between the Pacific Plate and the North American plate.
Has a high degree of risk as the plate moves on a Dextral motion i.e from left to the right side and is a highly unstable region of the earth and the displacement takes about 40 mm per year.
The formation of the plate began with the mid-Cenozoic period about 30 million tears ago.
