<P> During the last 66 million years, nearly the entire west coast of North America was dominated by a subduction zone, with the Farallon Plate subducting beneath the North American Plate . Presently, the Juan de Fuca Plate (with its Explorer and Gorda satellite plates) and the Rivera and Cocos Plates are the only remnants of the once much larger Farallon Plate . The plate margin that remains in California is that of the strike - slip San Andreas Fault (SAF), the diffuse Pacific--North American plate boundary that extends east into the Basin and Range Province of eastern California and western Nevada (a seismically active area called Walker Lane) and southwest into the California Continental Borderland region off the central and southern coasts . This system of faults terminates in the north at the Mendocino Triple Junction, one of the most seismically active regions in the state, where earthquakes are occasionally the result of intraplate deformation within the Gorda Plate . It terminates in the south at the Salton Sea where displacement transitions to a series of spreading centers and transform faults, beginning with the Brawley Seismic Zone in the Imperial Valley . </P> <P> In the San Francisco Bay Area, the San Andreas system of faults spans offshore and into the East Bay area, with the bulk of the faults lying to the east of the main SAF . There is a 70% probability that one of these faults will generate a M6. 7 or greater earthquake before 2030, including the Hayward Fault Zone, which has gone beyond its average return period of 130 years (150 years as of 2018). While the SAF north of San Francisco is quiet, the central SAF segment near San Juan Bautista is where fault creep was first studied, and to the south is where the recurring Parkfield earthquakes occur . The secondary faults lay to the west of the main SAF at the extreme southern portion, including the active and young San Jacinto Fault Zone, which may be taking over as the primary boundary south of Cajon Pass . A paleoseismic investigation using Lidar revealed that more than 5 meters (16 ft) of slip has accumulated since the 1857 event on the southern SAF, which borders the Mojave Desert to the north and east of the Greater Los Angeles Area . Near the Transverse Ranges, reverse and thrust faults have produced damaging earthquakes in Santa Barbara and the San Fernando Valley . </P> <Table> <Tr> <Th> Date </Th> <Th> Name </Th> <Th> Area </Th> <Th> Mag . </Th> <Th> MMI </Th> <Th> Deaths </Th> <Th> Injuries </Th> <Th> Total damage / notes </Th> <Th> </Th> </Tr> <Tr> <Td> 2014 - 08 - 24 </Td> <Td> South Napa </Td> <Td> North Bay </Td> <Td> 6.0 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> ~ 200 </Td> <Td> $362 m--$1 b </Td> <Td> </Td> </Tr> <Tr> <Td> 2014 - 03 - 28 </Td> <Td> La Habra </Td> <Td> LA Area </Td> <Td> 5.1 M </Td> <Td> 7000600000000000000 ♠ VI </Td> <Td> </Td> <Td> Few </Td> <Td> $10.8 m </Td> <Td> </Td> </Tr> <Tr> <Td> 2013 - 05 - 13 </Td> <Td> Canyondam </Td> <Td> Eastern </Td> <Td> 5.7 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> dmge: Canyondam </Td> <Td> </Td> </Tr> <Tr> <Td> 2010 - 04 - 04 </Td> <Td> Baja California </Td> <Td> Baja California </Td> <Td> 7.2 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> 2--4 </Td> <Td> 100--233 </Td> <Td> $1.15 b </Td> <Td> </Td> </Tr> <Tr> <Td> 2010 - 01 - 09 </Td> <Td> Eureka </Td> <Td> North Coast </Td> <Td> 6.5 M </Td> <Td> 7000600000000000000 ♠ VI </Td> <Td> </Td> <Td> 35 </Td> <Td> $21.8--43 m </Td> <Td> </Td> </Tr> <Tr> <Td> 2008 - 07 - 29 </Td> <Td> Chino Hills </Td> <Td> LA Area </Td> <Td> 5.5 M </Td> <Td> 7000600000000000000 ♠ VI </Td> <Td> </Td> <Td> 8 </Td> <Td> Limited </Td> <Td> </Td> </Tr> <Tr> <Td> 2007 - 10 - 30 </Td> <Td> Alum Rock </Td> <Td> South Bay </Td> <Td> 5.6 M </Td> <Td> 7000600000000000000 ♠ VI </Td> <Td> </Td> <Td> </Td> <Td> Limited </Td> <Td> </Td> </Tr> <Tr> <Td> 2003 - 12 - 22 </Td> <Td> San Simeon </Td> <Td> Central Coast </Td> <Td> 6.6 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> 40 </Td> <Td> $250--300 m </Td> <Td> </Td> </Tr> <Tr> <Td> 2000 - 09 - 03 </Td> <Td> Yountville </Td> <Td> North Bay </Td> <Td> 5.0 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 41 </Td> <Td> $10--50 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1999 - 10 - 16 </Td> <Td> Hector Mine </Td> <Td> Eastern </Td> <Td> 7.1 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 4--5 </Td> <Td> Limited </Td> <Td> </Td> </Tr> <Tr> <Td> 1994 - 12 - 26 </Td> <Td> Samoa </Td> <Td> North Coast </Td> <Td> 5.5 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> </Td> <Td> $2.1--5 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1994 - 01 - 17 </Td> <Td> Northridge </Td> <Td> LA Area </Td> <Td> 6.7 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> 57 </Td> <Td> 8,700 + </Td> <Td> $13--$40 b </Td> <Td> </Td> </Tr> <Tr> <Td> 1992 - 06 - 28 </Td> <Td> Big Bear </Td> <Td> Inland Empire </Td> <Td> 6.5 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> Some </Td> <Td> Moderate / triggered </Td> <Td> </Td> </Tr> <Tr> <Td> 1992 - 06 - 28 </Td> <Td> Landers </Td> <Td> Inland Empire </Td> <Td> 7.3 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> </Td> <Td> 400 + </Td> <Td> $92 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1992 - 04 - 26 </Td> <Td> Cape Mendocino </Td> <Td> North Coast </Td> <Td> 6.6 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> dmge / triggered </Td> <Td> </Td> </Tr> <Tr> <Td> 1992 - 04 - 26 </Td> <Td> Cape Mendocino </Td> <Td> North Coast </Td> <Td> 6.5 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> dmge / triggered </Td> <Td> </Td> </Tr> <Tr> <Td> 1992 - 04 - 25 </Td> <Td> Cape Mendocino </Td> <Td> North Coast </Td> <Td> 7.2 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> </Td> <Td> 98--356 </Td> <Td> $48.3--75 m / tsunami </Td> <Td> </Td> </Tr> <Tr> <Td> 1992 - 04 - 22 </Td> <Td> Joshua Tree </Td> <Td> Inland Empire </Td> <Td> 6.3 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 32 </Td> <Td> Light--moderate </Td> <Td> </Td> </Tr> <Tr> <Td> 1991 - 06 - 28 </Td> <Td> Sierra Madre </Td> <Td> LA Area </Td> <Td> 5.6 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 100--107 </Td> <Td> $33.5--40 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1990 - 02 - 28 </Td> <Td> Upland </Td> <Td> LA Area </Td> <Td> 5.7 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 30 </Td> <Td> $12.7 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1989 - 10 - 17 </Td> <Td> Loma Prieta </Td> <Td> Santa Cruz Mts </Td> <Td> 6.9 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> 63 </Td> <Td> 3,757 </Td> <Td> $5.6--6 b / tsunami </Td> <Td> </Td> </Tr> <Tr> <Td> 1989 - 08 - 08 </Td> <Td> Loma Prieta </Td> <Td> Santa Cruz Mts </Td> <Td> 5.4 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> </Td> <Td> Minor </Td> <Td> </Td> </Tr> <Tr> <Td> 1987 - 11 - 24 </Td> <Td> Elmore Ranch </Td> <Td> Imperial Valley </Td> <Td> 6.5 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> </Td> <Td> Triggered </Td> <Td> </Td> </Tr> <Tr> <Td> 1987 - 11 - 23 </Td> <Td> Superstition Hills </Td> <Td> Imperial Valley </Td> <Td> 6.1 M </Td> <Td> 7000600000000000000 ♠ VI </Td> <Td> </Td> <Td> </Td> <Td> $3 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1987 - 10 - 01 </Td> <Td> Whittier </Td> <Td> LA Area </Td> <Td> 5.9 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> 8 </Td> <Td> 200 </Td> <Td> $213--358 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1986 - 07 - 21 </Td> <Td> Chalfant Valley </Td> <Td> Eastern </Td> <Td> 6.2 M </Td> <Td> 7000600000000000000 ♠ VI </Td> <Td> </Td> <Td> </Td> <Td> $2.7 m / sequence </Td> <Td> </Td> </Tr> <Tr> <Td> 1986 - 07 - 13 </Td> <Td> Oceanside </Td> <Td> South Coast </Td> <Td> 5.8 M </Td> <Td> 7000600000000000000 ♠ VI </Td> <Td> </Td> <Td> </Td> <Td> $700 K </Td> <Td> </Td> </Tr> <Tr> <Td> 1986 - 07 - 08 </Td> <Td> N. Palm Springs </Td> <Td> Inland Empire </Td> <Td> 6.0 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 29--40 </Td> <Td> $4.5--6 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1986 - 03 - 31 </Td> <Td> Mt Lewis </Td> <Td> South Bay </Td> <Td> 5.6 M </Td> <Td> 7000600000000000000 ♠ VI </Td> <Td> </Td> <Td> 6 </Td> <Td> Minor </Td> <Td> </Td> </Tr> <Tr> <Td> 1984 - 04 - 24 </Td> <Td> Morgan Hill </Td> <Td> South Bay </Td> <Td> 6.2 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> 21--27 </Td> <Td> $7.5--8 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1983 - 05 - 02 </Td> <Td> Coalinga </Td> <Td> Central Valley </Td> <Td> 6.2 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> 94 </Td> <Td> $10 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1981 - 04 - 26 </Td> <Td> Westmorland </Td> <Td> Imperial Valley </Td> <Td> 5.9 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> </Td> <Td> $1--3 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1980 - 11 - 08 </Td> <Td> Eureka </Td> <Td> North Coast </Td> <Td> 7.3 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 6 </Td> <Td> $2--2.75 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1980 - 05 - 25 </Td> <Td> Mammoth Lakes </Td> <Td> Eastern </Td> <Td> 6.2 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 9 </Td> <Td> $1.5 m / swarm </Td> <Td> </Td> </Tr> <Tr> <Td> 1980 - 01 - 26 </Td> <Td> Livermore </Td> <Td> East Bay </Td> <Td> 5.4 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> </Td> <Td> Doublet </Td> <Td> </Td> </Tr> <Tr> <Td> 1980 - 01 - 24 </Td> <Td> Livermore </Td> <Td> East Bay </Td> <Td> 5.8 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> </Td> <Td> $11.5 m / doublet </Td> <Td> </Td> </Tr> <Tr> <Td> 1979 - 10 - 15 </Td> <Td> Imperial Valley </Td> <Td> Imperial Valley </Td> <Td> 6.4 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> </Td> <Td> 91 </Td> <Td> $30 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1979 - 08 - 06 </Td> <Td> Coyote Lake </Td> <Td> South Bay </Td> <Td> 5.7 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 16 </Td> <Td> $500 K </Td> <Td> </Td> </Tr> <Tr> <Td> 1978 - 08 - 13 </Td> <Td> Santa Barbara </Td> <Td> Central Coast </Td> <Td> 5.8 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 65 </Td> <Td> $12 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1975 - 08 - 01 </Td> <Td> Butte County </Td> <Td> Butte County </Td> <Td> 5.7 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> 10 </Td> <Td> $3 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1973 - 02 - 21 </Td> <Td> Point Mugu </Td> <Td> South Coast </Td> <Td> 5.8 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> Several </Td> <Td> $1 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1971 - 02 - 09 </Td> <Td> San Fernando </Td> <Td> LA Area </Td> <Td> 6.6 M </Td> <Td> 7001110000000000000 ♠ XI </Td> <Td> 58--65 </Td> <Td> 200--2,000 </Td> <Td> $505--553 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1969 - 10 - 01 </Td> <Td> Santa Rosa </Td> <Td> North Bay </Td> <Td> 5.7 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> Doublet </Td> <Td> </Td> </Tr> <Tr> <Td> 1969 - 10 - 01 </Td> <Td> Santa Rosa </Td> <Td> North Bay </Td> <Td> 5.6 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> </Td> <Td> $8.35 m / doublet </Td> <Td> </Td> </Tr> <Tr> <Td> 1968 - 04 - 08 </Td> <Td> Borrego Mtn </Td> <Td> Imperial Valley </Td> <Td> 6.5 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> </Td> <Td> dmge / rockslides </Td> <Td> </Td> </Tr> <Tr> <Td> 1957 - 03 - 22 </Td> <Td> San Francisco </Td> <Td> Bay Area </Td> <Td> 5.7 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> 40 </Td> <Td> $1 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1954 - 12 - 21 </Td> <Td> North Coast </Td> <Td> Eureka </Td> <Td> 6.5 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> Several </Td> <Td> $2.1 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1952 - 08 - 22 </Td> <Td> Kern County </Td> <Td> Central Valley </Td> <Td> 5.8 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> Several </Td> <Td> $10 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1952 - 07 - 21 </Td> <Td> Kern County </Td> <Td> Central Valley </Td> <Td> 7.3 M </Td> <Td> 7001110000000000000 ♠ XI </Td> <Td> 12 </Td> <Td> Hundreds </Td> <Td> $60 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1948 - 12 - 04 </Td> <Td> Desert Hot Springs </Td> <Td> Inland Empire </Td> <Td> 6.4 M </Td> <Td> 7000700000000000000 ♠ VII </Td> <Td> </Td> <Td> Several </Td> <Td> Minor </Td> <Td> </Td> </Tr> <Tr> <Td> 1941 - 11 - 14 </Td> <Td> Torrance--Gardena </Td> <Td> LA Area </Td> <Td> 5.4 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> $1.1 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1941 - 06 - 30 </Td> <Td> Santa Barbara </Td> <Td> Central Coast </Td> <Td> 5.9 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> $100 K </Td> <Td> </Td> </Tr> <Tr> <Td> 1940 - 05 - 18 </Td> <Td> El Centro </Td> <Td> Imperial Valley </Td> <Td> 6.9 M </Td> <Td> 7001100000000000000 ♠ X </Td> <Td> 9 </Td> <Td> 20 </Td> <Td> $6 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1933 - 03 - 10 </Td> <Td> Long Beach </Td> <Td> South Coast </Td> <Td> 6.4 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> 115--120 </Td> <Td> </Td> <Td> $40 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1932 - 06 - 06 </Td> <Td> Eureka </Td> <Td> North Coast </Td> <Td> 6.4 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> Severe </Td> <Td> </Td> </Tr> <Tr> <Td> 1927 - 11 - 04 </Td> <Td> Lompoc </Td> <Td> Central Coast </Td> <Td> 7.3 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> Moderate / tsunami </Td> <Td> </Td> </Tr> <Tr> <Td> 1925 - 06 - 29 </Td> <Td> Santa Barbara </Td> <Td> Central Coast </Td> <Td> 6.8 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> 13 </Td> <Td> </Td> <Td> $8 m </Td> <Td> </Td> </Tr> <Tr> <Td> 1923 - 01 - 22 </Td> <Td> Humboldt County </Td> <Td> North Coast </Td> <Td> 7.2 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> Severe / tsunami </Td> <Td> </Td> </Tr> <Tr> <Td> 1920 - 06 - 21 </Td> <Td> Inglewood </Td> <Td> LA Area </Td> <Td> 4.9 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> More than $100 K </Td> <Td> </Td> </Tr> <Tr> <Td> 1918 - 04 - 21 </Td> <Td> San Jacinto </Td> <Td> Inland Empire </Td> <Td> 6.7 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> </Td> <Td> Several </Td> <Td> $200 K </Td> <Td> </Td> </Tr> <Tr> <Td> 1915 - 06 - 22 </Td> <Td> Imperial Valley </Td> <Td> Imperial Valley </Td> <Td> 5.5 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> add'l dmge / doublet </Td> <Td> </Td> </Tr> <Tr> <Td> 1915 - 06 - 22 </Td> <Td> Imperial Valley </Td> <Td> Imperial Valley </Td> <Td> 5.5 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> 6 </Td> <Td> </Td> <Td> $900 K / doublet </Td> <Td> </Td> </Tr> <Tr> <Td> 1911 - 07 - 01 </Td> <Td> Calaveras </Td> <Td> South Bay </Td> <Td> 6.6 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> dmge: Lick Observatory </Td> <Td> </Td> </Tr> <Tr> <Td> 1906 - 04 - 18 </Td> <Td> Imperial Valley </Td> <Td> Imperial Valley </Td> <Td> 6.3 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> dmge / triggered </Td> <Td> </Td> </Tr> <Tr> <Td> 1906 - 04 - 18 </Td> <Td> San Francisco </Td> <Td> Northern--Central </Td> <Td> 7.9 M </Td> <Td> 7001110000000000000 ♠ XI </Td> <Td> 700--3,000 + </Td> <Td> </Td> <Td> Conflagration / tsunami </Td> <Td> </Td> </Tr> <Tr> <Td> 1899 - 12 - 25 </Td> <Td> San Jacinto </Td> <Td> Inland Empire </Td> <Td> 6.7 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> 6 </Td> <Td> </Td> <Td> $50 K or more </Td> <Td> </Td> </Tr> <Tr> <Td> 1898 - 03 - 30 </Td> <Td> Mare Island </Td> <Td> North Bay </Td> <Td> 5.8--6.4 M </Td> <Td> 7000850000000000000 ♠ VIII--IX </Td> <Td> </Td> <Td> </Td> <Td> $350 K / moderate </Td> <Td> </Td> </Tr> <Tr> <Td> 1892 - 04 - 21 </Td> <Td> Vacaville--Winters </Td> <Td> Central Valley </Td> <Td> 6.2 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> </Td> <Td> </Td> <Td> Doublet </Td> <Td> </Td> </Tr> <Tr> <Td> 1892 - 04 - 19 </Td> <Td> Vacaville--Winters </Td> <Td> North Bay </Td> <Td> 6.4 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> </Td> <Td> </Td> <Td> $225 K--250K / doublet </Td> <Td> </Td> </Tr> <Tr> <Td> 1892 - 02 - 23 </Td> <Td> Laguna Salada </Td> <Td> Baja California </Td> <Td> 7.1--7.2 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> Moderate </Td> <Td> </Td> </Tr> <Tr> <Td> 1873 - 11 - 23 </Td> <Td> Crescent City </Td> <Td> North Coast </Td> <Td> 6.7 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> dmge / ground cracks </Td> <Td> </Td> </Tr> <Tr> <Td> 1872 - 03 - 26 </Td> <Td> Lone Pine </Td> <Td> Eastern </Td> <Td> 7.4--7.9 M </Td> <Td> 7001100000000000000 ♠ X </Td> <Td> 27 </Td> <Td> 56 </Td> <Td> $250 K / limited </Td> <Td> </Td> </Tr> <Tr> <Td> 1868 - 10 - 21 </Td> <Td> Hayward </Td> <Td> Bay Area </Td> <Td> 6.3--6.7 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> 30 </Td> <Td> </Td> <Td> $350 K / moderate </Td> <Td> </Td> </Tr> <Tr> <Td> 1865 - 10 - 08 </Td> <Td> Santa Cruz Mts </Td> <Td> Santa Cruz Mts </Td> <Td> 6.3 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> $500 K </Td> <Td> </Td> </Tr> <Tr> <Td> 1857 - 01 - 09 </Td> <Td> Fort Tejon </Td> <Td> Central--Southern </Td> <Td> 7.9 M </Td> <Td> 7000900000000000000 ♠ IX </Td> <Td> </Td> <Td> </Td> <Td> Severe </Td> <Td> </Td> </Tr> <Tr> <Td> 1838 - 06 -?? </Td> <Td> San Andreas </Td> <Td> Bay Area </Td> <Td> 6.8--7.2 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> Minor </Td> <Td> </Td> </Tr> <Tr> <Td> 1812 - 12 - 21 </Td> <Td> Ventura </Td> <Td> Central Coast </Td> <Td> 7.1 M </Td> <Td> 7000800000000000000 ♠ VIII </Td> <Td> </Td> <Td> </Td> <Td> Tsunami </Td> <Td> </Td> </Tr> <Tr> <Td> 1812 - 12 - 08 </Td> <Td> San Juan Capistrano </Td> <Td> South Coast </Td> <Td> 6.9--7.5 </Td> <Td> 7000800000000000000 ♠ VII--IX </Td> <Td> 40 </Td> <Td> </Td> <Td> Moderate </Td> <Td> </Td> </Tr> <Tr> <Td_colspan="9"> Stover & Coffman 1993 uses various seismic scales . M is a local magnitude that is equivalent to M (Richter magnitude scale) and is used for events that occurred prior to the instrumental period . It is based on the area of perceptibility (as presented on isoseismal maps). M = moment magnitude scale and M = surface wave magnitude . The inclusion criteria for adding events are based on WikiProject Earthquakes' notability guideline that was developed for stand alone articles . The principles described are also applicable to lists . In summary, only damaging, injurious, or deadly events should be recorded . dmge = damage, m = million, b = billion </Td> </Tr> </Table> <Tr> <Th> Date </Th> <Th> Name </Th> <Th> Area </Th> <Th> Mag . </Th> <Th> MMI </Th> <Th> Deaths </Th> <Th> Injuries </Th> <Th> Total damage / notes </Th> <Th> </Th> </Tr>

What was the date of the largest earthquake recorded in california