"mere miles from major, destructive fault lines, such as the Imperial Fault, The San Andreas Fault Line, and the San Jacinto Fault Zone. The Superstition Faults also pose a major risk to the area, as well as The Brawley Seismic Zone, which produces frequent, yet mostly, non-damaging, earthquake swarms. At certain times, this area can experience dozens of felt earthquakes in a time period lasting from one day to over one week. Most of the earthquakes are minor to moderate and pose no hazard due to strict seismic codes, however, this area is notorious for Earthquake Swarms, and other major"
"a rupture along both faults could produce a quake with a magnitude of as much as 7.0, though such an event would likely happen only once every 3,000 to 5,000 years. Hollywood fault The Hollywood fault is an active fault of approximately in length located along the northern edge of the Los Angeles basin. It is part of a system of seismically active folds and faults that constitute the complex transition zone between the Transverse and Peninsular Ranges. The Malibu Coast—Santa Monica—Hollywood fault system is the result of transtension and transpression associated with rotation of the Transverse Ranges in the"
"Laguna Salada Fault The Laguna Salada Fault is a geological fault between the United States and Mexico. About long, it straddles the Imperial County-California–Baja California border. According to some seismologists the 1892 Laguna Salada earthquake ranks among the largest earthquakes in California and Baja California in historic times. It occurred on 23 February 1892, and was centered near Laguna Salada in Baja California. The Laguna Salada Fault is thought to be the origin of the 2010 Baja California earthquake. Prior to this, the fault had not produced a major earthquake for over 100 years, since 1892. The Laguna Salada Fault"
"interval of roughly 140–160 years. Northwest of Frazier Park, the fault runs through the Carrizo Plain, a long, treeless plain where much of the fault is plainly visible. The Elkhorn Scarp defines the fault trace along much of its length within the plain. The southern segment, which stretches from Parkfield in Monterey County all the way to the Salton Sea, is capable of an 8.1-magnitude earthquake. At its closest, this fault passes about to the northeast of Los Angeles. Such a large earthquake on this southern segment would kill thousands of people in Los Angeles, San Bernardino, Riverside, and surrounding"
"a system of coastal faults which run roughly parallel to the San Andreas. The movement of the San Gregorio is right-lateral strike-slip, and the slip rate is estimated to be 4 to 10 mm/year (0.2 to 0.4 inch/year). The most recent major earthquake along the fault occurred some time between 1270-1775 AD, with an estimated magnitude of 7 to 7.25. San Gregorio Fault The San Gregorio Fault is an active, 209 km (130 mi) long fault located off the coast of Northern California. The southern end of the fault is in southern Monterey Bay, and the northern end is about"
"Elsinore Fault Zone The Elsinore Fault Zone is a large right-lateral strike-slip geological fault structure in Southern California. The fault is part of the trilateral split of the San Andreas fault system and is one of the largest, though quietest faults in Southern California. The Elsinore fault zone, not including Whittier, Chino, and Laguna Salada faults, is long with a slip-rate of 4.0 millimeters/year (0.15 in/yr). It is estimated that this zone is capable of producing a quake of 6.5–7.5 M. The projected interval between major rupture events is 250 years. The last major rupture event on the main Elsinore"
"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). The fault divides into three segments, each with different characteristics and a different degree of earthquake risk. The slip rate along the fault ranges from /yr. The fault was identified in 1895 by Professor Andrew Lawson of UC Berkeley, who discovered the northern zone. It is often described as having been named after San Andreas Lake, a small body of water that"
"zones have remained about the same"". The Shoreline Fault is a 25 km long vertical strike-slip fault, identified in 2008, which lies approximately three hundred meters from the Diablo Canyon Nuclear Power Plant in California. According to Pacific Gas & Electric, the fault may produce quakes up to 6.5 magnitude. Mandated three-dimensional seismic studies have not been yet completed, and are not prerequisites for reissuance of the operating licenses for the two onsite units. The company asserts the facility is able to withstand a 7.5 magnitude quake, and NRC's estimate of the risk each year of an earthquake intense enough"
"Hayward Fault Zone The Hayward Fault Zone is a geologic fault zone capable of generating destructive earthquakes. This fault is about long, situated mainly along the western base of the hills on the east side of San Francisco Bay. It runs through densely populated areas, including Richmond, El Cerrito, Berkeley, Oakland, San Leandro, Castro Valley, Hayward, Union City, Fremont, and San Jose. The Hayward Fault is parallel to the San Andreas Fault, which lies offshore and through the San Francisco Peninsula. To the east of the Hayward lies the Calaveras Fault. In 2007 the Hayward Fault was discovered to merge"
"is a probable southern continuation of the Elsinore Fault Zone in Southern California. These faults are considered to be secondary cohorts of the San Andreas Fault, and as such share some of the strike-slip motion between the North American Plate and the Pacific Plate. Laguna Salada Fault The Laguna Salada Fault is a geological fault between the United States and Mexico. About long, it straddles the Imperial County-California–Baja California border. According to some seismologists the 1892 Laguna Salada earthquake ranks among the largest earthquakes in California and Baja California in historic times. It occurred on 23 February 1892, and was"
"Hollywood fault The Hollywood fault is an active fault of approximately in length located along the northern edge of the Los Angeles basin. It is part of a system of seismically active folds and faults that constitute the complex transition zone between the Transverse and Peninsular Ranges. The Malibu Coast—Santa Monica—Hollywood fault system is the result of transtension and transpression associated with rotation of the Transverse Ranges in the Cenozoic Era. It has an established dip angle of between 70° and 90° based on surface and subsurface observations, and has experienced significant left-slip movement since the late Miocene. Its minimum"
"Rose Canyon Fault The Rose Canyon Fault is a right-lateral strike-slip fault running in a north-south direction through San Diego County, California. The Rose Canyon Fault is about in length. It starts in the Mission Valley area and heads past Mt. Soledad and La Jolla into the Pacific Ocean where it joins other faults such as the Oceanside Fault. Not much is known about the Rose Canyon fault, though its slip-rate is thought to be 1.1 mm/year. The Rose Canyon Fault has sustained at least one late Holocene rupture, with the date of the earthquake estimated to be after AD"
"Ventura Fault Ventura Fault also Ventura-Pitas Point Fault is an offshore and onshore Fault system of Southern California, beginning around Santa Barbara coming onshore in Ventura with an eastward heading, its extension is unknown but presumed to head for San Bernardino. It is among a network of faults in the area, potentially connecting to San Cayetano Fault, Lion Fault, and Red Mountain Fault (the latter offshore). California Geological Survey researchers have reported that the fault is capable of an 8.0 earthquake, along with tsunami affecting Santa Barbara, Ventura, and Santa Monica. A big earthquake on the fault estimated to occur"
"is unusual in comparison to all other faults in Northern California due to its nearly east-west alignment. Battle Creek Fault Zone The Battle Creek Fault Zone is a system of closely parallel faults that run between the Coast Ranges near the town of Cottonwood to the west, extending northeast about 22 miles toward the southern slopes of Mt. Lassen. The faulting action is normal (vertical motion) with terrain to the south lower than terrain to the north. Although there have been no earthquakes in historic times, it is believed that the fault zone may still be active, and has been"
"Sierra Nevada Fault The Sierra Nevada Fault is an active seismic fault along the eastern edge of the Sierra Nevada mountain block in California. It forms the eastern escarpment of the Sierra Nevada, extending roughly from just north of the Garlock Fault to the Cascade Range. Uplift on this fault is about 0.01–0.03 mm per year. This movement, combined with the activity of the adjacent Owens Valley and Lone Pine faults, is responsible for the continuing rise of the Sierra Nevada Mountains. No large earthquake has been reported on this fault in recorded history. The largest earthquake in its vicinity"
"the Sichuan-Yunnan block. The Xianshuihe fault system comprises several distinct segments, with an overall length of about 350 km. The main segments are the Ganzi (or Ganzi-Yushu), the Xianshuihe, the Anninghe-Zemuhe, and the Xiaojiang faults. Movements on this fault system have been responsible for many large historical earthquakes, with more than 20 events of magnitude greater than 6.5 since 1700. Some of these earthquakes have formed linked sequences, with each event being triggered by the previous one due to stress changes. Like the San Andreas Fault in California, the Xianshuihe exhibits a behavior called Aseismic creep. The Xianshuihe fault creeps"
"long depression town of population 192. This composition of California gives it unique topography, inclusive of the highest and lowest points of the United States, Mount Whitney and Death Valley. The San Andreas Fault is a transform boundary, which lies between the North American Plate and the Pacific Plate and extends 1200 km. A transform boundary in the lithosphere means that two plates create a ‘fracture zone’ and rub against one another, causing stress and resulting in an earthquake. California is located above the San Andreas Fault, and causes the majority of Californian Earthquakes, inclusive of the Olancha Earthquake Series"
"plates is the San Andreas Fault. The San Andreas Fault is more than 800 miles long and extends to depths of at least 10 miles. Many other smaller faults like the Hayward (San Francisco Bay Area) and the San Jacinto (Southern California) join with the San Andreas to form the San Andreas Fault Zone. The Pacific Plate grinds northwestward past the North American Plate at a rate of about two inches per year. It has been proposed by W. J. Humphreys that ""earthquake weather"" is not of geological causes, but merely a psychological manifestation. Humphreys argued that ""the general state"
"fault tectonic system. Volcanic activity and earthquakes occur as a consequence to this tectonic configuration. The San Andreas Fault runs roughly parallel to the northeastern margin of Lake Cahuilla, where it moved at a rate of over the last 45,000–50,000 years. Earthquakes are documented in sediments from Lake Cahuilla, but this southern segment has not ruptured in historical time. Tectonic extension occurs at the points where the fault forms stepovers, although the extensional structures are still relatively immature. The Cahuilla Basin, also known as the Salton Sink, is part of the trough that is occupied by the Gulf of California."
"Puente Hills Fault The Puente Hills Fault (also known as the Puente Hills thrust system) is an active geological fault that is located in the Los Angeles Basin in California. The thrust fault was discovered in 1999 and runs about in three discrete sections from the Puente Hills region in the southeast to just south of Griffith Park in the northwest. The fault is known as a blind thrust fault due to a lack of surface features normally associated with thrust faults. Large earthquakes on the fault are relatively infrequent but computer modeling has indicated that a major event could"
"better understand fault behavior . The northern segment of the fault runs from Hollister, through the Santa Cruz Mountains, epicenter of the 1989 Loma Prieta earthquake, then up the San Francisco Peninsula, where it was first identified by Professor Lawson in 1895, then offshore at Daly City near Mussel Rock. This is the approximate location of the epicenter of the 1906 San Francisco earthquake. The fault returns onshore at Bolinas Lagoon just north of Stinson Beach in Marin County. It returns underwater through the linear trough of Tomales Bay which separates the Point Reyes Peninsula from the mainland, runs just"
"the Yuha Desert and Salton Trough suggest that the 2010 M7.2 El Mayor ‐ Cucapah earthquake rupture, the Laguna Salada fault in Baja California, Mexico, and the Elsinore fault in California are part of the same fault system."" Elsinore Fault Zone The Elsinore Fault Zone is a large right-lateral strike-slip geological fault structure in Southern California. The fault is part of the trilateral split of the San Andreas fault system and is one of the largest, though quietest faults in Southern California. The Elsinore fault zone, not including Whittier, Chino, and Laguna Salada faults, is long with a slip-rate of"
"1838 San Andreas earthquake The 1838 San Andreas earthquake is believed to be a rupture along the northern part of the San Andreas Fault in June 1838. It affected approximately 100 km (62 miles) of the fault, from the San Francisco Peninsula to the Santa Cruz Mountains. It was a strong earthquake, with an estimated moment magnitude of 6.8 to 7.2, making it one of the largest known earthquakes in California. The region was lightly populated at the time, although structural damage was reported in San Francisco, Oakland, and Monterey. It is unknown whether there were fatalities. Based on geological"
"the northern San Francisco Bay Area since the 1906 San Francisco earthquake. The current tectonics of northern California are mainly controlled by the San Andreas Fault system, the zone of dextral strike-slip faulting that accommodates displacement between the North American Plate and the Pacific Plate along this transform boundary. In addition to the San Andreas Fault itself there are numerous other sub-parallel dextral strike-slip faults that take up some of the plate boundary motion distributed through a zone more than 100 km wide. The 1969 earthquakes and most of their aftershocks occurred along the Healdsburg Fault, which lies between the"
"one person killed and 200 injured. Other aspects of the event included an experimental earthquake warning system that alerted seismologists several seconds before the damaging shear waves arrived, temporary changes in springs and wells, and the potential for postseismic fault creep. The San Andreas Fault System is an active plate boundary comprising right-lateral strike-slip faults that runs nearly the length of California. This network of faults trends north-northwest in the area of the West Napa Fault, where it is wide from west to east. The West Napa Fault transfers slip between a group of related faults (including the Concord Fault"
"destroyed. The events are remembered as one of the worst and deadliest earthquakes in the history of the United States. The death toll remains the greatest loss of life from a natural disaster in California's history and high in the lists of American disasters. The San Andreas Fault is a continental transform fault that forms part of the tectonic boundary between the Pacific Plate and the North American Plate. The strike-slip fault is characterized by mainly lateral motion in a dextral sense, where the western (Pacific) plate moves northward relative to the eastern (North American) plate. This fault runs the"
"Guaymas Fault The Guaymas Fault, named for the city of Guaymas, Sonora, Mexico, is a major right lateral-moving transform fault which runs along the seabed of the Gulf of California. It is an integral part of the Gulf of California Rift Zone, the northern extremity of the East Pacific Rise. The Guaymas Fault runs from the San Pedro Martir Basin located at the southern end of the San Lorenzo Fault (the next transform to the north), and extends southward to the Guaymas Basin, a heavily sedimented rift which includes both continental and oceanic crust and contains numerous hydrothermal vents. The"
"active seismic zone running from Stamford, Connecticut, to the Hudson Valley town of Peekskill, New York—the intersection of the Stamford-Peekskill line with the well-known Ramapo Fault—which passes less than a mile north of the Indian Point nuclear power plant. The Ramapo Fault is the longest fault in the Northeast, but scientists dispute how active this roughly 200-million-year-old fault really is. Many earthquakes in the state's surprisingly varied seismic history are believed to have occurred on or near it. Visible at ground level, the fault line likely extends as deep as nine miles below the surface. In July 2013, Entergy engineers"
"be the force behind the creation of the Sierra Nevada. Sierra Nevada Fault The Sierra Nevada Fault is an active seismic fault along the eastern edge of the Sierra Nevada mountain block in California. It forms the eastern escarpment of the Sierra Nevada, extending roughly from just north of the Garlock Fault to the Cascade Range. Uplift on this fault is about 0.01–0.03 mm per year. This movement, combined with the activity of the adjacent Owens Valley and Lone Pine faults, is responsible for the continuing rise of the Sierra Nevada Mountains. No large earthquake has been reported on this"
"by the Biodiversity Research Center of the Californias of the San Diego Natural History Museum. The land on which San Diego–Tijuana sits is due west of a major transform fault. The transform fault, known as the San Andreas Fault was created during the Cenozoic Era by the movements of the Pacific Plate and North American Plate. The region experiences earthquakes and felt the shocks of the 2009 Gulf of California earthquake and 2010 Baja California earthquake. The main mountain ranges of the Peninsular Ranges ridging eastern San Diego–Tijuana are the Palomar Mountains, Laguna Mountains, Sierra de Juárez, and the peaks"
"Garlock Fault The Garlock Fault is a left-lateral strike-slip fault running northeast-southwest along the north margins of the Mojave Desert of Southern California, for much of its length along the southern base of the Tehachapi Mountains. The Garlock Fault marks the northern boundary of the area known as the Mojave Block, as well as the southern ends of the Sierra Nevada and the valleys of the westernmost Basin and Range province. Stretching for , it is the second-longest fault in California and one of the most prominent geological features in the southern part of the state. The Garlock Fault runs"
"plate. The 1906 rupture propagated both northward and southward from its epicenter for a total of about . The San Andreas Fault runs the length of California from the Salton Sea in the south to Cape Mendocino to the north, a distance of about . The earthquake ruptured the northern third of the fault for a distance of about . The maximum observed surface displacement was about ; however, geodetic measurements show displacements of up to in some places. The most recent analysis by the United States Geological Survey (USGS) shows that the most likely epicenter of the 1906 earthquake"
"fault was in 1910 with a 6 M earthquake centered just northwest of the city of Lake Elsinore. The fault runs from the mountainous Peninsular Ranges region between El Centro and San Diego, northwest to the Chino Hills range and Chino Hills. On the southern end of the fault zone is the southeastern extension of the Elsinore fault zone, the Laguna Salada Fault. At its northern end, the Elsinore fault zone splits into two segments, the Chino Fault and the Whittier Fault. In the Elsinore Trough, the Elsinore fault zone creates four graben rift valleys between the Santa Ana Mountain"