Simplified fault map of southern CaliforniaThe faults of Southern California viewed to the southeast, as modeled by the Southern California Earthquake Center. (Click on icon for a larger image.) Highlighted in purple are the San Andreas fault (left) and Santa Monica Bay complex (right). The foreground is in the Santa Barbara Channel, the east-trending zone marks the Transverse Range. Faults in the upper left are part of the Eastern California Shear Zone, connecting northward with the Walker Lane region. Faults extend deeper than shown.Cumulative energy released by all earthquakes in Southern California from 1932 through July 2014. Highest energy in red, the lowest energy in dark blue. Data from the Southern California Earthquake Center. (Click on an icon for a larger image.)
Most of central and northern California rests on a crustal block (terrane) that is being torn from the North American continent by the passing Pacific plate of oceanic crust. Southern California lies at the southern end of this block, where the Southern California faults create a complex and even chaotic landscape of seismic activity.
Seismic, geologic, and other data has been integrated by the Southern California Earthquake Center to produce the Community Fault Model (CFM) database that documents over 140 faults in southern California considered capable of producing moderate to large earthquakes.[1] A three-dimensional (3D) model has been derived that can be viewed with suitable visualization software (see image).[2] The probability of a serious earthquake on various faults has been estimated in the 2008 Uniform California Earthquake Rupture Forecast. Details on specific faults can be found in the USGS Quaternary Fault and Fold Database.
^Plesch & others 2007.
^See External links for download url.
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Pacific plate of oceanic crust. SouthernCalifornia lies at the southern end of this block, where the SouthernCaliforniafaults create a complex and even chaotic...
estimated $20 billion. Many SouthernCaliforniafaults are able to produce a Mw 6.7 earthquake or greater, such as the San Andreas Fault, which can produce Mw ...
Garlock, and Big faults, California. pp. 443–458. ISBN 978-0-8137-2338-9. {{cite book}}: |journal= ignored (help) "San Andreas Fault Observatory at Depth"...
transform faults, beginning with the Brawley Seismic Zone in the Imperial Valley. In the San Francisco Bay Area, the San Andreas system of faults spans offshore...
three main groups of faults: the San Andreas Fault and linked faults, the Eastern California Shear Zone (ECSZ), and the California Continental Borderland...
Garlock Fault is a left-lateral strike-slip fault running northeast–southwest along the north margins of the Mojave Desert of SouthernCalifornia, for much...
the Hayward Fault, San Andreas Fault and at the "geological lock" to flood the two faults with water from nearby lakes and cause both faults to move causing...
many individual fault segments, some of which have only been individualized as recently as the 1980s, but activity along the line of faults has been documented...
split of the San Andreas fault system and is one of the largest, though quietest faults in SouthernCalifornia. The Elsinore fault zone, not including Whittier...
The Ramapo Fault zone is a system of faults between the northern Appalachian Mountains and Piedmont areas to the east. Spanning more than 185 miles (298 km)...
four fault structures are some of the major faults in California at the latitude of San Francisco. All are right lateral-moving strike-slip faults. The...
Salada Yuma Gulf of California Colorado River Valley Cerro Prieto volcano The Imperial Fault Zone is a system of geological faults located in Imperial...
of the western segment the bounding faults are left slip Santa Ynez and Pine Mountain Faults. The San Gabriel Fault and San Andreas bound the central segment...
transferred to various other faults to the south and east, including the Little Lake and Airport Lake faults. The Little Lake Fault has been considered a splay...
shaped Antelope Valley in SouthernCalifornia. The outlines of this valley are caused by the two largest faults in California: the San Andreas and the...
interpretation would suggest. Transform faults are closely related to transcurrent faults and are commonly confused. Both types of fault are strike-slip or side-to-side...
geologic faults. These include (from north to south, see map) the: Devils Mountain Fault Strawberry Point and Utsalady Point faultsSouthern Whidbey Island...
trans-current faults and co-evolutionary dip-slip faults formed as result of a spatially segregated displacement field. The eastern California shear zone...
geography of southernCalifornia refers to the geography of southernCalifornia in the United States. Despite the popular image of California as a place...
Madrid Fault Line, is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the Southern and Midwestern...
southern continuation of the Elsinore Fault Zone in SouthernCalifornia. These faults are considered to be secondary cohorts of the San Andreas Fault...
The Guaymas Fault is often grouped together with the three transform faults to its north as the Guaymas Transform Fault System. These faults are, from north...
movement along the fault. Differential movement and erosion may occur either along older inactive geologic faults, or recent active faults. Fault scarps often...
California San Jacinto River (California) San Jacinto Fault Zone, a SouthernCalifornianfault zone San Jacinto Valley, California San Jacinto, Indiana San...
300 km (800 mi) from the mouth of the Gulf of California to the southern terminus of the San Andreas Fault at the Salton Sink. The GCRZ is an incipient...
occurred at about 8:20 a.m. (Pacific time) on January 9 in central and SouthernCalifornia. One of the largest recorded earthquakes in the United States, with...
earthquake drills across the state. The California Geological survey added 50 new faults to its map of faults several weeks after the earthquake. Geological...
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