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Calaveras Fault. 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. The last large event was the magnitude 6.2 1984 Morgan Hill event.
Since the three damaging earthquakes that occurred in the American Midwest and the United States East Coast ( 1755 Cape Ann, 1811–12 New Madrid, 1886 Charleston) were well known, it became apparent to settlers that the earthquake hazard was different in California. While the 1812 San Juan Capistrano, 1857 Fort Tejon, and 1872 Owens Valley ...
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] This fault is about 119 km (74 mi) long, [2] situated mainly along the ...
The 1971 San Fernando earthquake (also known as the 1971 Sylmar earthquake) occurred in the early morning of February 9 in the foothills of the San Gabriel Mountains in southern California. The unanticipated thrust earthquake had a magnitude of 6.5 on the Ms scale and 6.6 on the Mw scale, and a maximum Mercalli intensity of XI ( Extreme ).
1906 San Francisco earthquake. / 37.75; -122.55. At 05:12 Pacific Standard Time on Wednesday, April 18, 1906, the coast of Northern California was struck by a major earthquake with an estimated moment magnitude of 7.9 and a maximum Mercalli intensity of XI ( Extreme ).
The last earthquake above 7.0 in California was a 7.1 temblor in Ridgecrest in 2019. It killed one person and caused $5.3 billion in damage. The only thing that prevented a far greater toll was ...
The Brawley Seismic Zone ( BSZ ), also known as the Brawley fault zone, is a predominantly extensional tectonic zone that connects the southern terminus of the San Andreas Fault with the Imperial Fault in Southern California. [1] The BSZ is named for the nearby town of Brawley in Imperial County, California, and the seismicity there is ...
A magnitude 4.1 earthquake was reported offshore in California on the morning of New Year’s day, according to the US Geological Survey. The seismic event occurred at 8:27 am local time 11 miles ...