The Raymond Fault is a fault across central

Los Angeles County Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the List of the most populous counties in the United States, most populous county in the United States and in the U.S. state of California, ...

and western

Ventura County Ventura County () is a county in the southern part of the U.S. state of California. As of the 2020 census, the population was 843,843. The largest city is Oxnard, and the county seat is the city of Ventura. Ventura County comprises the Oxn ...

Southern California Southern California (commonly shortened to SoCal) is a geographic and Cultural area, cultural region that generally comprises the southern portion of the U.S. state of California. It includes the Los Angeles metropolitan area, the second most po ...

San Gabriel Valley area

The eastern end of the Raymond Fault branches from the

San Andreas Fault The San Andreas Fault is a continental transform fault that extends roughly through California. It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip (horizontal). ...

in the

San Gabriel Mountains The San Gabriel Mountains ( es, Sierra de San Gabriel) are a mountain range located in northern Los Angeles County and western San Bernardino County, California, United States. The mountain range is part of the Transverse Ranges and lies betwe ...

where it forms the east fork of the San Gabriel River and

Monrovia Monrovia () is the capital city of the West African country of Liberia. Founded in 1822, it is located on Cape Mesurado on the Atlantic coast and as of the 2008 census had 1,010,970 residents, home to 29% of Liberia’s total population. As th ...

Canyon. The fault is very straight and follows a WbS path. It then goes straight west through Arcadia and the Santa Anita Racetrack in the

San Gabriel Valley The San Gabriel Valley ( es, Valle de San Gabriel) is one of the principal valleys of Southern California, lying immediately to the east of the eastern city limits of the city of Los Angeles, and occupying the vast majority of the eastern part ...

, and then forms the

San Rafael Hills The San Rafael Hills are a mountain range in Los Angeles County, California. They are one of the lower Transverse Ranges, and are parallel to and below the San Gabriel Mountains, adjacent to the San Gabriel Valley overlooking the Los Angeles Ba ...

San Marino San Marino (, ), officially the Republic of San Marino ( it, Repubblica di San Marino; ), also known as the Most Serene Republic of San Marino ( it, Serenissima Repubblica di San Marino, links=no), is the fifth-smallest country in the world an ...

and South Pasadena, and Raymond Hill after which the fault is named.

Los Angeles–Ventura areas

The fault continues west to form the hills of Highland Park, the lower eastern Santa Monica Mountains from

Dodger Stadium Dodger Stadium is a baseball stadium in the Elysian Park neighborhood of Los Angeles, California. It is the home stadium of Major League Baseball's Los Angeles Dodgers. Opened in 1962, it was constructed in less than three years at a cost of ...

, Silver Lake, and

Griffith Park Griffith Park is a large municipal park at the eastern end of the Santa Monica Mountains, in the Los Feliz neighborhood of Los Angeles, California. The park includes popular attractions such as the Los Angeles Zoo, the Autry Museum of the Am ...

through the

Hollywood Hills The Hollywood Hills are a residential neighborhood in the central region of Los Angeles, California. Geography The Hollywood Hills straddle the Cahuenga Pass within the Santa Monica Mountains. The neighborhood touches Studio City, Univer ...

above the

Sunset Strip The Sunset Strip is the stretch of Sunset Boulevard that passes through the city of West Hollywood, California. It extends from West Hollywood's eastern border with the city of Los Angeles near Marmont Lane to its western border with Beverly H ...

and

Studio City Studio City is a neighborhood in the city of Los Angeles, California, in the southeast San Fernando Valley, just west of the Cahuenga Pass. It is named after the studio lot that was established in the area by film producer Mack Sennett in 1927, ...

. Further west the Raymond Fault creates the higher central and western

Santa Monica Mountains The Santa Monica Mountains is a coastal mountain range in Southern California, next to the Pacific Ocean. It is part of the Transverse Ranges. Because of its proximity to densely populated regions, it is one of the most visited natural areas in ...

from

Beverly Hills Beverly Hills is a city located in Los Angeles County, California. A notable and historic suburb of Greater Los Angeles, it is in a wealthy area immediately southwest of the Hollywood Hills, approximately northwest of downtown Los Angeles. B ...

and along the southern

San Fernando Valley The San Fernando Valley, known locally as the Valley, is an urbanized valley in Los Angeles County, California. Located to the north of the Los Angeles Basin, it contains a large portion of the City of Los Angeles, as well as unincorporated ...

Thousand Oaks Thousand Oaks is the second-largest city in Ventura County, California, United States. It is in the northwestern part of Greater Los Angeles, approximately from the city of Los Angeles and from Downtown. It is named after the many oak trees ...

and Malibu, and on to Point Mugu at the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the conti ...

. The fault then continues underwater to form the northern

Channel Islands The Channel Islands ( nrf, Îles d'la Manche; french: îles Anglo-Normandes or ''îles de la Manche'') are an archipelago in the English Channel, off the French coast of Normandy. They include two Crown Dependencies: the Bailiwick of Jersey, ...

, and beyond to where it terminates.

External links

Southern California Earthquake Data Center: Raymond Fault

USGS Earthquake Hazards Program database: Raymond Fault
Seismic faults of California Geology of Los Angeles County, California Geology of Ventura County, California Natural history of the Santa Monica Mountains Natural history of the Transverse Ranges Natural history of Los Angeles County, California Natural history of Ventura County, California Channel Islands of California Geography of the San Fernando Valley Geography of the San Gabriel Valley {{VenturaCountyCA-geo-stub