A map depicting all fault lines in the Bay Area and listing the probability

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[Volcanic sediments also exist in the 130] Bay Area, which was left by the St. Andreas fault movement, which cut the dive plate and caused the magma to flow to the surface temporarily. [131] The landform of the area has a considerable vertical terrain, but the alluvial plains or inland valleys leading to the bay are not. The terrain and geological history of the Bay Area are largely due to the crowding pressure between the Pacific Plate and the North American Plate.


[132] of an earthquake on the fault line. A map showing the seven main fault student database lines in the Gulf District and the probability of an M6.7 magnitude or above earthquake between 2003 and 2032 The three ridge structures in the Gulf District are part of the Pacific Coast Mountains, and are generally parallel to the main fault.


The Santa Cruz Mountains along the San Francisco Peninsula and the Marin Mountains in Marin County extend along the San Andreas fault, and the Berkeley Mountains, San Leandro Mountains and their southern ridges extend to the rough coastal Ward fault of Mishin Peak extension，The Diapolo Mountains include the Diablo Mountains and Hamilton Mountains extending along the Caravilas fault. [133] There are a total of seven major fault systems and hundreds of related faults in the Gulf area, all of which are affected by the relative movement between the Pacific and North American plates or the pressure stress between these plates.