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Calaveras Fault
The Calaveras Fault is a major branch of the San Andreas Fault located in northern California in the San Francisco Bay Area, where magnitude 6 earthquakes have regularly been recorded, most recently in 1984. A magnitude 5.6 earthquake occurred on the Calaveras Fault in October 2007.
It is believed to link with the Hayward fault, as well as the West Napa Fault, north of the Carquinez Strait. It passes through or near the cities of Alamo, Danville, San Ramon, Dublin, Pleasanton, Sunol, Milpitas, San Jose, Gilroy, and Hollister.
==Location==
To the east of the Hayward-Rodgers Creek fault, the Calaveras fault extends , splaying from the San Andreas fault near Hollister and terminating at Danville at its northern end.〔http://pubs.usgs.gov/of/2003/of03-214/OFR-03-214_FullText.pdf〕 It runs east of the San Andreas, diverging from it in the vicinity of Hollister, California, and is responsible for the formation of the Calaveras Valley there. Between the San Andreas Fault and the Calaveras Fault lies the Hayward Fault, which diverges from the Calaveras Fault east of San Jose, California. To the east lies the Clayton-Marsh Creek-Greenville Fault. These four fault structures are some of the major faults in California at the latitude of San Francisco. All are right lateral-moving strike-slip faults.
The Calaveras Fault was named for Calaveras Creek in Santa Clara County east of San Jose where it was first identified. (''Calaveras'' is Spanish for "skulls".) "Calaveras" is also the name of a California county in the foothills of the Sierra Nevada mountains, some east of Santa Clara County, far from the Calaveras Fault.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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