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These are the six geologic faults in California with sufficient data to use a stress-renewal model for estimating the probability of an M ≥ 6.7 earthquake within the next 30 years. The Hayward fault zone and Rodgers Creek fault are treated as a single fault; the San Andreas fault is treated as two sections.
Of the six main faults evaluated in previous studies the Southern San Andreas Fault remains the most likely to experience an M ≥ 6.7 earthquake in the next 30 years. The largest increase in such likelihood is on the Calaveras Fault (see main faults map for location), where the mean (most likely) value is now set at 25%.
The probability of a serious earthquake on various faults has been estimated in the 2008 Uniform California Earthquake Rupture Forecast. According to the United States Geological Survey, Southern California experiences nearly 10,000 earthquakes every year. [3] Details on specific faults can be found in the USGS Quaternary Fault and Fold Database.
South of this tectonic block, they join together, and this forms the San Diego Trough Fault Zone. [7] The next segment of fault runs narrow and straight for a distance of 100–150 km (62–93 mi) while roughly parallel to the coast. [7] The fault zone continues south before merging with the Bahía Soledad fault off the coast of Baja California ...
The act in its current form has three main provisions: 1) It directs the state's California Geological Survey agency (then known as the California Division of Mines and Geology) to compile detailed maps of the surface traces of known active faults. These maps include both the best known location where faults cut the surface and a buffer zone ...
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Further west the Raymond Fault creates the higher central and western Santa Monica Mountains from Beverly Hills and along the southern San Fernando Valley to Thousand Oaks and Malibu, and on to Point Mugu at the Pacific Ocean. The fault then continues underwater to form the northern Channel Islands, and beyond to where it terminates.