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TABLE 6.1.-Major California and Nevada earthquakes, 1769-1989.

[Earthquake origin times, magnitudes, and locations before 1900 principally derived from interpretations of felt reports by Toppozada and others (1981); after 1900, data principally derived from Gutenberg and Richter (1954) and bulletins of the California Institute of Technology, University of California, Berkeley, University of Nevada, Reno, and U,S, Geological Survey. See text for discussion of summary magnitude M. [Only the summary magnitude is shown in this electronic edition, F.N.].

Date Time(GMT) Lat N. Long W. Locality M

1769/07/28 34° 118° Los Angeles Basin 6?

1800/11/22 21:30 33° 117°18' San Diego region

1808/06/21 37°48' 122°30' San Francisco region 6?

1812/l2/08 15:00 34°22' 117°39' Wnghtwood 7

1812/l2/21 19:00 34°12' 119°54' Santa Barbara Channel 7

1827/09/24 04:00 34° 119° Los Angeles region 5½?

1836/06/10 15:30 37°48' 122°12' Hayward fault

1838/06/? p.m. 37°36' 122°24' San Francisco Peninsula 7

1852/11/29 20:00 32°30' 115° Volcano Lake, B.C.

1855/07/11 04:15 34° 6' 118° 6' Los Angeles region 6?

1856/02/15 13:25 37°30' 122°18' San Francisco Peninsula

1857/01/09 16:00 35°42' 120°18' Great Fort Tejon earthquake

1857/09/03 03:05 39°18' 120° Western Nevada or eastern
Sierra Nevada

1858/11/26 08:35 37°30' 121°54' San Jose region

1858/12/16 10:00 34° 117°30' San Bernadino region 6

1860/03/15 19:00 39°30' 119°30' Carson City, Nev. region

1861/07/04 00:11 37°48' 122° 0' San Ramon Valley

1862/05/27 20:00 32°42' 117°12' SanDiegoregion 6

1864/02/26 13:47 37° 6' 121°42' Southern Santa Cruz Mountains 6

1864/03/05 16:49 37°42' 122° East of San Francisco Bay

1865/10/08 20:46 37° 0' 122° 0' Southem Santa Cruz Mountains

1866/07/15 06:30 37°30' 121°18' Western San Joaquin Valley 6

1868/05/30 05:10 39°18' 119°42' Virginia City, Nev. 6

1868/10/21 15:53 37°42' 122° 6' Hayward fault 7

1869/12/27 01:55 39°24' 119°42' Olinghouse fault, Nev. (?)

1869/12/27 10:00 39° 6' 119°48' Carson City, Nev. region 6

1870/02/17 20:12 37°12' 122° 6' Los Gatos 6

1871/03/02 21:05 40°24' 124°12' Cape Mendocuno 6

1872/03/26 10:30 36°42' 118° 6' Owens Valley 7.6

1872/O3/26 14:06 36°54' 118°12' Owens Valley

1872/04/03 12:15 37° 118°12' Owens Valley

1872/04/ll 19:00 37°30' 118°30' Owens Valley

1872/O5/03 01:00 33° 115° Imperial Valley (?) >5.5

1872/11/12 00:00 39°? 117°? Austin, Nev. region (?) 6

1873/11/23 05:00 42° 124° Crescent City

1875/01/24 12:00 40°12' 120°30' Honey Lake 6

1875/11/15 22:30 32°30' 115°30' Imperial Valley to Colo. River (?)

1878/05/09 04:25 40° 6' 124° Punta Gorda region 6

1881/02/02 00:11 36° 0' 120°30' Parkfield

1881/04/10 10:00 37°24' 121°24' Western San Joaquin Valley 6

1882/03/06 21:45 36°54' 121°12' Hollister

1883/09/05 12:30 34°12' 119°54' Santa Barbara Channel

1884/01/28 07:30 41°6' 123°36' Klamath Mountains

1884/03/26 00:40 37°6' 122°12' Santa Cruz Mountains 6

1885/01/31 05:45 40°24' 120°36' Susanville

1885/04/12 04:05 36°24' 121° Southern Diablo Range

1887/06/03 10:48 39°12' 119°48' Carson City, Nev region

1888/04/29 04:48 39°42' 120°42' Mohawk Valley 6

1889/05/19 11:10 38° 0' 121°54' Antioch

1889/06/20 06:00 40°30' 120°42' Susanville 6

1889/09/30 05:20 37°12' 118°42' Bishop region

1890/02/09 12:06 33°24' 116°18' San Jacinto or Elsinore fault reg.(?)

1890/04/24 11:36 36°54' 121°36' ,Pajaro Gap

1890/07/26 09:40 40°30' 124°12' Cape Mendocino

1891/07/30 14:10 32° 115° Colorado River delta region 6

1892/02/24 07:20 32°33' 115°38' Laguna Salada, B.C. 7

1892/04/19 10:50 38°24' 122° 0' Vacaville

1892/04/21 17:43 38°30' 121°54' Winters

1892/05/28 11:15 33°12' 116°12' San Jacinto or Elsinore fault reg.(?)

1892/11/13 12:45 36°48' 121°30' Hollister

1893/05/19 00:35 34° 6' 119°24' Pico Canyon.

1894/07/30 05:12 34°18' 117°36' Lytle Creek region 6

1894/09/30 17:36 40°18' 123°42' Cape Mendocino region 6

1894/10/23 23:03 32°48' 116°48' East of San Diego

1896/08/17 11:30 36°42' 118°18' Southeastern Sierra Nevada 6

1897/06/20 20:14 37° 0' 121°30' Gilroy

1898/03/31 07:43 38°12' 122°24' Mare Island

1898/04/15 07:07 39°12' 123°48' Mendocino

1899/04/16 13:40 41°? 126°? West of Eureka 7

1899/07/06 20:10 37°12' 121°30' Morgan Hill

1899/07n2 20:32 34°18' 117°30' Lytle Creek region

1899/12/25 12:25 33°48' 117° 0' San Jacinto and Hemet 6.4

1901/03/03 07:45 36° 0' 120°30' Parkfield 6.4

1903/01/24 05:27 31°30' 115° Colorado River delta region 6.6

1903/06/11 13:12 37°24' 121°54' San Jose

1903/08/03 06:49 37°18' 121°48' San Jose

1906/04/18 13:12 37°42' 122°30' Great 1906 earthquake

1906/04/19 00:30 32°54' 115°30' Imperial Valley 6.2

1906/04/23 09:10 41° 124° Arcata 6.4

1907/09/20 01:54 34°12'? 117° 6'? San Bernadino region 5.3

1908/11/04 08:37 36°? 117°? Death Valley region 6?

1909/10/29 06:45 40°30' 124°12' Cape Mendocino 5.8

1910/03/11 06:52 36°54' 121°48' Watsonville 5.8

1910/03/19 00:11 40°? 125°? West of Cape Mendocino 6.0

1910/05/15 15:47 33°42' 117°24' Glen Ivy Hot Spnngs

1910/08/05 01:31 42° 127° West of Crescent City 6.6

1911/07/01 22:00 37°15' 121°45' Calaveras fault 6.5

1914/02/18 18:17 39°30' 119°48' Truckee region 5½?

1914/04/24 08:34 39°30' 119°48 Truckee region 6

1915/05/06 12:09 40° 126° West of Cape Mendocino 6.2

1915/06/23 03:59 32°48' 115°30' Imperial Valley 6.0

1915/06/23 04:56 32°48' 115°30' Imperial Valley 5.9

1915/10/03 06:52 40°30' 117°30' Pleasant Valley, Nev. 7.3

1915/11/21 00:13 32° 115° Volcano Lake, B.C. 7.1

1915/12/31 12:20 41° 126° West of Eureka 6.5

1916/02/03 05:03 41° 117°48' North of Pleasant Valley, Nev 5.9

1916/10/23 02:44 34°54' 118°54' Tejon Pass region 5.3

1916/11/10 09:11 35°30' 116° 0' South of Death Valley 6.1

1918/04/21 22:32 33°48' 117° 0' San Jacinto 6.9

1918/07/15 00:23 41° 125° West of Eureka 6.5

192V01/26 09:31 41° 126° West of Eureka 6.0

192V01/31 13:17 41° 125°30' West of Eureka 7.3

192V03/10 11:21 36°0' 120°30' Parkfield 6.3

1923/01/22 09:04 40°30' 124°30' Cape Mendocino 7.2

1923/07/23 07:30 34° 0' 117°18' San Bernadino region 6.0

1925/06/04 12:02 41°30' 125° West of Eureka 6

1925/06n9 14:42 34°18' 119°48' Santa Barbara 6.3

1926/10/22 12:35 36°37' 122°21' Monterey Bay 6.1

1926/10/22 13:35 36°33' 122°11' Monterey Bay 6.1

1926/12/10 08:38 40°45' 126° West of Cape Mendocino 6.0

1927/09/18 02:07 37°30' 118°45' Bishop region 6

1927/11/04 13:50 34°42' 120°48' Southwest of Lompoc 7.3

1932/06/06 08:44 40°45' 124°30' Eureka 6.4

1932/12/21 06:10 38°45' 118° Cedar Mountain, Nev. 7.2

1933/01/05 06:51 38°46' 117°44' Cedar Mountaun, Nev. 5.9

1933/03/11 01:54 33°37' 117°58' Long Beach 6.3

1933/06/25 20:45 39°4' 119°20' Yerington,Nev. 6.1

1934/01/30 20:16 38°18' 118°24' Excelsior Mountain, Nev. 6.3

1934/06/08 04:47 36° 0' 120°30' Parkfield5.2, 6.0, 6.1 6.0

1934/07/06 22:48 41°15' 125°45' West of Eureka 6.5

1934/12/30 13:52 32°15' 115°30' Laguna Salada, B.C. 6.5

1934/12/31 18:45 32° 114°45' Colorado River delta 7.0

1935/02/24 01:45 31°59' 115°12' Colorado River delta 5.3

1936/06/03 09:15 40° 125°30' West of Cape Mendocino 5.9

1937/03nS 16:49 33°28 116°25' Buck Ridge 6.0

1940/02/08 08:05 39°45' 121°15' Chico 6

1940/05/19 04:36 32°44' 115°30' Imperial Valley 7.1

1940/12/07 22:16 31°40' 115° 5' Colorado River delta

1941/02/09 09:44 40°42' 125°24' West of Cape Mendocino 6.6

1941/04/09 17:08 31° 114° Gulf of Califomia 5.3

1941/05/13 16:01 40°18' 126°24' West of Cape Mendocino 6.0

1941/07/01 07:50 34°22' 119°35' Carpenteria 5.9

1941/09/14 16:43 37°34' 118°44' Tom's Place 5.8

1941/09/14 18:39 37°34' 118°44' Tom s Place 6.0

1941/10/03 16:13 40°24' 124°48' West of Cape Mendocino 6.4

1942/10/21 16:22 33° 3 116° 5' Fish Creek Mountains 6.5

1942/12/03 09:44 39°42' 119°18' North of Wadsworth, Nev. 5.9

1945/05/19 15:07 40°24' 126°54' West of Cape Mendocino 6.2

1945/09/28 22:24 41°54' 126°42' West of Crescent City 6.0

1946/03/15 13:49 35°44' 118° 3' Walker Pass 6.3

1947/04/10 15:58 34°59' 116°33' Manix 6.4

1948/12/04 23:43 33°56' 116°23' Desert Hot Springs 6.5

1948/12/29 12:53 39°33' 120° 5' Verdi, Nev. 6.0

1949/03/24 20:56 41°18' 126° West of Eureka 6.2

1949/05/02 11:25 34°l' 115°41' Pinto Mountain 5.9

1951/10/08 04:10 40°15' 124°30' West of Cape Mendocino 6

1951/12/26 00:46 32°48' 118°18' San Clemente Island 5.9

1952/07/21 11:52 35°0' 119° I' Kern County earthquake 7.7

1952/07/2l 12:05 35° 0' 119° 0' Kern County 6.4

1952/07/23 00:38 35°22 118°35' Kern County 6.1

1952/07/29 07:03 35°23 118°51 Bakersfield 6.1

1952/11/22 07:46 35°44 121°12 Bryson 6.0

1954/01/12 23:33 35° 0' 119°l' West of Wheeler Ridge 5.9

1954/03/19 09:54 33°17' 116°11' Arroyo Salada 6.2

1954/07/06 11:13 39°25' 118°32' Rainbow Mountain, Nev. 6.6

1954/07/06 22:07 39°18' 118°30' Rainbow Mountain, Nev. 6.4

1954/08/24 05:51 39°35' 118°27' Stillwater, Nev. 6.6

1954/08/31 22:20 39°30' 118°30' Stillwater, Nev. 5.8

1954/10/24 09:14 31°30' 116° East of Santo Tomas, B.C. 6.0

1954/11/12 12:26 31°30' 116° East of Santo Tomas,B.C. 6.3

1954/11/25 11:16 40°16' 125°38' West of Cape Mendocino 6.5

1954/12/16 11:07 39°19' 118°12' Fairview Peak, Nev. 7.1

1954/12/16 11:11 39°30' 118° 0' Dixie Valley, Nev. 6.8

1954/12/21 19:56 40°56 123°47 East of Arcata 6.6

1956/02/09 14:32 31°45' 115°55 San Miguel, B.C. 6.8

1956/02/09 15:24 31°45' 115°55' San Miguel, B.C. 6.1

1956/02/14 18:33 31°30' 115°30' San Miguel, B.C. 6.3

1956/02/15 01:20 31°30' 115°30' San Miguel, B.C. 6.4

1956/10/11 16:48 40°40' 125°46' West of Cape Mendocino 6.0

1956/12/13 13:15 31° 115° Westem shore, Gulf of Califomia 6.0

1959/03/23 07:10 39°36' 118° 1' Dixie Valley, Nev. 6.3

1959/06/13 14:35 39° 5' 118°49' Schurz, Nev. 6.1

1960/08/09 07:39 40°19' 127° 4' West of Cape Mendocino 6.2

1966/06/28 04:26 36° 0' 120°30' Parkfield 6.0

1966/08/07 17:36 31°48' 114°30' Gulf of Califomia 6.3

1966/09/12 16:41 39°25' 120° 9' Truckee 6.0

1968/04/09 02:28 33°11' 116° 8' Borrego Mountain 6.5

1968/06/26 01:42 40°14' 124°16' Punta Gorda 5.4

1971/02/09 14:00 34°25' 118°24' San Femando 6.5

1973/02/2l 14:45 34° 4' 119° 2' Point Mugu 5.2

1979/08/06 17:05 37° 7' 121°31' Coyote Lake 5.7

1979/10/15 23:16 32°36' 115°18' Imperial Valley 6.5

1980/0I/24 19:00 37°50' 121°47' Livemmore 5.8

1980/05/25 16:33 37°36' 118°50' Mammoth Lakes 6.1

1980/05/25 16:49 37°39' 118°54' Mammoth Lakes 5.9

1980/05/25 19:44 37°33' 118°49' Mammoth Lakes 5.8

1980/05/27 14:50 37°29' 118°48' Mammoth Lakes 6.0

1980/06/09 03:28 32°12' 115° S' Victoria, B.C. 6.4

1980/11/08 10:27 41° 7' 124°40' West of Eureka 7.2

1981/04/26 12:09 33° 8' 115°39' Westmorland 6.0

1981/09/04 15:50 33°40' 119° 7' Nonh of Santa Barbara Island 5.9

1981/09/30 11:53 37°35' 118°52' Mammoth Lakes 5.8

1983/05/02 23:42 36°14' 120°19' Coalinga 6.5

1983/07/22 02:39 36°14' 120°25' Coalinga 5.7

1984/04/24 21:15 37°19' 121°39' Morgan Hill 6.1

1984/09/10 03:14 40°23' 127° 9' Mendocino Fracture Zone 6.7

1984/11/23 18:08 37°27' 118°36' Round Valley 5.7

1985/08/04 12:01 36° 8' 120°10' North Kettleman Hills 5.9

1986/07/08 09:20 34° 0' 116°36' North Palm Springs 6.0

1986/07/20 14:29 37°34' 118°26' Chalfant Valley 5.6

1986/07/2l 14:42 37°32' 118°26' Chalfant Valley 6.2

1986/07/31 07:22 37°28' 118°22' Chalfant Valley 5.2

1987/10/01 14:42 34° 3' 118° 5' Whither Narrows 5.8

1987/11/24 01:53 33°4' 115°47' Elmore Ranch fault 6.2

1987/11/24 13:16 33° 1' 115°51' Superstition Hills 6.6

1989/10/18 00:04 37° 2' 121°53' Loma Prieta 7.1