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USGS map showing faults that span the Pacific–North America plate boundary. The Hayward Fault Zone is a right-lateral strike-slip geologic fault zone capable of generating destructive earthquakes. The fault was first named in the Lawson Report of the 1906 San Francisco Earthquake in recognition of its involvement in the earthquake of 1868. [1]
The 1868 Hayward earthquake occurred in the San Francisco Bay Area, California, United States on October 21. With an estimated moment magnitude of 6.3–6.7 and a maximum Mercalli intensity of IX ( Violent ), it was the most recent large earthquake to occur on the Hayward Fault Zone .
Probabilistic seismic hazard map. The earliest known earthquake in the U.S. state of California was documented in 1769 by the Spanish explorers and Catholic missionaries of the Portolá expedition as they traveled northward from San Diego along the Santa Ana River near the present site of Los Angeles. Ship captains and other explorers also ...
A map of the faults that run through Stanislaus County. ... All of California is at high risk for earthquakes. There is an 80.62% chance of a major earthquake within 31 miles of Stanislaus County ...
The color-coded map shows a range of earthquake probability across the U.S. Well known high-risk areas, such as California and Alaska, are coded in dark red, denoting the highest risk.
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.
California hasn't experienced a major, ground-rupturing earthquake in more than a century .
Geologic maps of the Maacama Fault The Maacama Fault is a right lateral-moving (dextral) geologic fault located in the Coast Ranges of northwestern California . It is considered to be the northernmost segment of the Hayward Fault subsystem of the San Andreas Fault zone.