Instead, the Garlock fault underwent postseismic creep and exhibited a sizeable earthquake swarm. This fault is featured on the following maps: It appears, led by the Garlock fault, that the state’s web of fault lines is in a state of chaos and disruption. Other Notes: The Garlock fault zone is one of the most obvious geologic features in southern California, clearly marking 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 … near Tehachapi; 1500 A.D. Flying the drone over a portion of the Garlock Fault line, this is a pretty large fault, but not a particularly active one. (?) The July 4th earthquake would have affected the state of stress on nearby faults, including the east-west trending Garlock Fault, a major fault running along the south side of the epicentral area. The Gar­lock Fault runs from a junc­tion with the San An­dreas Fault in the An­te­lope Val­ley, east­ward to a junc­tion with the Death Val­ley Fault Zone in the east­ern Mo­jave Desert. NEAREST COMMUNITY: Frazier Park, Tehachapi, Mojave, Johannesburg OTHER NOTES: At the eastern end of the Garlock fault zone, the main trace splits up. Aftershocks Propagating Towards the Garlock Fault Seismicity between the M=7.1 at 8:19pm and midnight (local) has continued to the northwest and southeast. The slip history of the Garlock is critical for interpreting the deformation of the through-going dextral shear of the Walker Lane belt–Eastern California shear zone. For well over 500 years the fault, running in an east-west direction for nearly 200 miles, has been silent. The Garlock Fault nearby felt the pressure and has begun to move. Geologic evidence demonstrates that the feature is not a tectonic fault or feature; this category includes features such as demonstrated joints or joint zones, landslides, erosional or fluvial scarps, or landforms resembling fault scarps, but of demonstrable non-tectonic origin. “The Garlock fault is the border between the Sierras and the Mojave and all these different regions. The 250 km long Garlock fault strikes roughly east-west and its current surface expression is located between the San Andreas fault and the Death Valley fault zone. The San Andreas fault system is to the west, the Garlock fault is to the south and the faults of the Sierra Nevada are to the east. References. The southern branch is known as the Leach Lake fault. The fault also defines the boundary between the northwestern most Mojave and the southern portion of the Sierra Nevada geomorphic province. Stretching for 250 kilometers (160 mi), it is the second-longest fault in California, and one of the most prominent geological features in the southern part of the state. It forms the southern face of the El Paso Mountains, and last broke the surface in the Late Quaternary. near Johannesburg (Searles Valley) The rupture from the second quake in … The Garlock fault runs along the northern border of the Mojave Desert in southern California. The dynamic details of the rupture process during the mainshock are largely unknown, as is the amount of stress needed to bring the Garlock fault to failure. SLIP RATE: between 2 and 11 mm/yr; probably averages about 7 mm per year The intersection of the San Andreas (the blue line) and Garlock (orange line) faults in southern California reflects two different tectonic forces: … SLIP RATE: between 2 and 11 mm/yr; probably averages about 7 mm per year Faults in LA County: San Andreas Fault Mojave Section Map Garlock Fault Map Sierra Madre Zone Fault Map Whittier Fault Map Malibu Area Fault Map Raymond Fault Map San Fernando Valley Fault Map Santa Monica Area Faults A | B | C |  D | E | F |  G | H | I |  J | K | L |  M | N | O |  P | Q | R |  S | T | U |  V | W | X |  Y | Z. The San Andreas fault system is the major geologic boundary between the North American and Pacific tectonic plates and passes through much of the state. These facts, along with the freshness of scarps left behind from previous ruptures and the on-going seismicity associated with the fault zone, leave little doubt that the Garlock fault zone will rupture again in the future. It is named after the historic mining town of Garlock , founded in 1894 by Eugene Garlock and now a ghost town . But since the Ridgecrest quakes, that major earthquake fault has begun to move. Northwest Fault Map Red circle is the Eastern California Shear Zone. Look just below the red Ridgecrest label on the map to see the Garlock Fault. The southern branch is known as the Leach Lake fault. The Garlock fault extends from the San Andreas Fault in the west to Death Valley in the east, and hasn’t had a major earthquake in about 500 years. The Owens Valley fault runs roughly northwest-southeast starting near the northern tip of the Ridgecrest fault, and it … INTERVAL BETWEEN MAJOR RUPTURES: between 200 and 3000 years, depending on the fault segment The Garlock Fault is the defining fault between the Mojave Desert and Basin and Range geomorphic provinces. Garlock Fault. The Walker Lane is a geologic trough roughly aligned with the California / Nevada border southward to where Death Valley intersects the Garlock Fault, a major left lateral, or sinistral, strike-slip fault. The Garlock fault is an integral part of the plate-boundary deformation system inboard of the San Andreas fault (California, USA); however, the Garlock is transversely oriented and has the opposite sense of shear. At least one fsection of the fault has shown movement by creep in recent years. The blue circle is where the earthquakes were. OTHER NOTES: The El Paso fault is a normal fault just north of the main trace of the Garlock fault near Koehn Lake. While no earthquake has produced surface rupture on the Garlock fault in historic times (although cracks opened along a short segment of the fault in 1952, due to the shaking of the Kern County earthquake, and groundwater removal has also triggered slip in the Fremont Valley area), there have been a few sizable quakes recorded along the Garlock fault zone. The Garlock fault can cycle through long periods of hibernation, lasting as long as 3,000 years, Dolan said. PROBABLE MAGNITUDES: MW6.8 - 7.6 For the most up-to-date information, please refer to the interactive fault map. TYPE OF FAULTING: left-lateral strike-slip The Garlock fault line is near the Ridgecrest area where earthquakes measuring M6.4 and M7.1 hit in July and were followed by thousands of aftershocks. PROBABLE MAGNITUDES: MW6.8 - 7.6 A | B | C |  D | E | F |  G | H | I |  J | K | L |  M | N | O |  P | Q | R |  S | T | U |  V | W | X |  Y | Z. That’s going nowhere good. Los Angeles Fault Map, Southern California Earthquake Data Center, Training and Validation Data Sets for Deep Learning, magnitude 5.7 near the town of Mojave on July 11, 1992, Division of Geological and Planetary Sciences. After about two decades with no major quakes, it’s a wakeup call that we need to be prepared. The northern branch of the fault zone in this area is known as the Mule Spring fault. The Garlock Fault Zone. The bigger story could be other fault lines in the state erupting. This fault is featured on the following maps: Northwest Fault Map The most recent was a magnitude 5.7 near the town of Mojave on July 11, 1992. Los Angeles Fault Map, Southern California Earthquake Data Center, Training and Validation Data Sets for Deep Learning, magnitude 5.7 near the town of Mojave on July 11, 1992, Division of Geological and Planetary Sciences. KGET 17 | 01-09. MOST RECENT SURFACE RUPTURES: 1050 A.D. OTHER NOTES: The El Paso fault is a normal fault just north of the main trace of the Garlock fault near Koehn Lake. NEAREST COMMUNITY: Frazier Park, Tehachapi, Mojave, Johannesburg OTHER NOTES: The Garlock fault zone is one of the most obvious geologic features in southern California, clearly marking 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. But there are periods in which the Garlock fault is quite active. Garlock has been reported as capable of producing a magnitude 8 earthquake! Mojave Fault Map Basin and Range Fault Map The above map shows fault zones in the Los Angeles Basin region. Both the Mule Spring fault and the Leach Lake fault show evidence of surface rupture within the Holocene, so they probably accomodate a sizable fraction of the total slip of the western Garlock fault zone. 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