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 6½

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 6¾

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

1852/11/29 20:00 32°30' 115° Volcano Lake, B.C. 6½

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 5¾

1857/01/09 16:00 35°42' 120°18' Great Fort Tejon earthquake 8¼

1857/09/03 03:05 39°18' 120° Western Nevada or eastern
Sierra Nevada 6¼

1858/11/26 08:35 37°30' 121°54' San Jose region 6¼

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 6½

1861/07/04 00:11 37°48' 122° 0' San Ramon Valley 5¾

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 5¾

1865/10/08 20:46 37° 0' 122° 0' Southem Santa Cruz Mountains 6½

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. (?) 6¼

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 6¾

1872/04/03 12:15 37° 118°12' Owens Valley 6¼

1872/04/ll 19:00 37°30' 118°30' Owens Valley 6¾

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 6¾

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 (?) 6¼

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

1881/02/02 00:11 36° 0' 120°30' Parkfield 5¾

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

1882/03/06 21:45 36°54' 121°12' Hollister 5¾

1883/09/05 12:30 34°12' 119°54' Santa Barbara Channel 6¼

1884/01/28 07:30 41°6' 123°36' Klamath Mountains 5¾

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

1885/01/31 05:45 40°24' 120°36' Susanville 5¾

1885/04/12 04:05 36°24' 121° Southern Diablo Range 6¼

1887/06/03 10:48 39°12' 119°48' Carson City, Nev region 6½

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

1889/05/19 11:10 38° 0' 121°54' Antioch 6¼

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

1889/09/30 05:20 37°12' 118°42' Bishop region 5¾

1890/02/09 12:06 33°24' 116°18' San Jacinto or Elsinore fault reg.(?) 6½

1890/04/24 11:36 36°54' 121°36' ,Pajaro Gap 6¼

1890/07/26 09:40 40°30' 124°12' Cape Mendocino 6¼

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 6½

1892/04/21 17:43 38°30' 121°54' Winters 6¼

1892/05/28 11:15 33°12' 116°12' San Jacinto or Elsinore fault reg.(?) 6½

1892/11/13 12:45 36°48' 121°30' Hollister 5¾

1893/05/19 00:35 34° 6' 119°24' Pico Canyon. 5¾

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 5¾

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

1897/06/20 20:14 37° 0' 121°30' Gilroy 6¼

1898/03/31 07:43 38°12' 122°24' Mare Island 6½

1898/04/15 07:07 39°12' 123°48' Mendocino 6½

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

1899/07/06 20:10 37°12' 121°30' Morgan Hill 5¾

1899/07n2 20:32 34°18' 117°30' Lytle Creek region 5¾

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 5½

1903/08/03 06:49 37°18' 121°48' San Jose 5½

1906/04/18 13:12 37°42' 122°30' Great 1906 earthquake 8¼

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 5½

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 5½

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