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A simultaneous rupture of the connected Hayward-Rodgers Creek Fault – about 118 mi (190 km) long from just north of Healdsburg down to Alum Rock in San Jose – could result in a major earthquake of magnitude 7.4 that "would cause extensive damage and loss of life with global economic impact". [4]
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.
“It may not be associated with any of the major known, mapped fault lines.” ... Calaveras and Hayward faults, according to the county. ... There is an 80.62% chance of a major earthquake ...
A landmark report by the U.S. Geological Survey in 2018 estimates that at least 800 people could be killed and 18,000 more injured in a magnitude 7 earthquake on the Hayward fault centered below ...
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 January 2025).
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The tunnel crosses the Hayward Fault at a nearly perpendicular angle 850 feet (260 m) from its western portal, and creep along the fault resulted in an offset of 13 inches (330 mm) by 2008. [6] The maximum credible earthquake (magnitude 7.0) predicted in studies would cause an offset of 7.5 feet (2.3 m).
A major earthquake measuring 7.4 hit Taiwan early Wednesday, killing 9 and injuring at least 1,000. A 7.4 earthquake is exponentially more destructive than the 4.8 quake that struck central New ...