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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.
A map of the faults that run through Stanislaus County. ... Calaveras and Hayward faults, according to the county. ... All of California is at high risk for earthquakes.
The temblor followed three earlier small earthquakes — a magnitude 2.7 that struck near the Hayward fault at 5:03 a.m., followed by a magnitude 3.3 at 11:52 a.m., then a 3.2 at 11:54 a.m.
There is a 70% probability that one of these faults will generate a 6.7 M w or greater earthquake before 2030, including the Hayward Fault Zone, which has gone beyond its average return period of 130 years (156 years ago as of February 2025).
Multiple earthquakes shook California's Bay Area Thursday afternoon. The earthquakes occurred near Hayward, around 20 miles southeast of Oakland, with the strongest one hitting at 1:59 p.m. local ...
Calaveras Fault creep in downtown Hollister in April 2009. The Calaveras Fault is a major branch of the San Andreas Fault System that is located in northern California in the San Francisco Bay Area. Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep.
A fault off the Pacific coast could devastate Washington, Oregon and Northern California with a major earthquake and tsunami. Researchers mapped it comprehensively for the first time.