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. Garlock Fault Zone. Trenches T-9a and T-9b were located on the southern part of a linear valley, Trench T-10 was extended across a linear fault scarp on the north side of the valley (Fig. TYPE OF FAULTING: ... 1500 A.D. Some aftershocks have rumbled northwest of the Searles Valley earthquake, approaching the Owens Valley fault. This subsection includes the Slate Range, El Paso Mountains, Quail Mountains, Owlshead Mountains, southern ends of the Argus and Panamint Ranges, Searles Valley, Long Valley, and the southern end of Panamint Valley. In conjunction with available slip rates for the Garlock fault, the geomorphic offsets suggest that average recurrence intervals are probably within the range of 600–1200 years south of El Paso Mountains, about 200–750 years in Searles Valley, about 200–1300 years in Pilot Knob Valley, and about 200–3000 years near Leach Lake and in the Avawatz Mountains.Published versio Lithology and Stratigraphy. September 2019 Conference: 2019 SCEC Annual Meeting Poster #107 / Image: SCEC screenshot of USGS Recent Earthquakes Map. The left-lateral Garlock Fault, 250 km long, bounds Searles Valley on the south and is the most geologically significant fault in the area. Searles Valley Earthquake Sequence including aftershocks as of July 9th, 2019 at 3:00 PM PT. 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 most populated area near the epicenter was Ridgecrest, home to 28,000 people. Searles Valley is an ∼450 km 2 teardrop-shaped valley located north of the Garlock fault in the southwestern Basin and Range. California's Garlock fault line, was jostled into moving for the first time on record. The foreshock originated along a strike-slip fault in the Eastern California Shear Zone, a region frequented by earthquake swarms, near the edge of Death Valley … Red lines indicate previously mapped faults. The Owens Valley fault runs roughly northwest-southeast starting near the northern tip of the Ridgecrest fault, and it last ruptured in a large earthquake (about M7.8) in 1872. (?) But a network of smaller faults in this region also pose a major earthquake hazard, not only because they can themselves generate large quakes, but because shaking along one fault can cause others to come to life. The Searles Valley fault (W-directed normal fault) transfers slip onto the Panamint Valley zone, which changes from dominantly NNW-trending dextral strike-slip to more normal motion where they join. 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 valley is bound on the west by the Argus Range and on the east by the Slate Range (Fig. Below An M6.4 foreshock in the region between the Searles Valley and Ridgecrest on July 4 was quickly followed by a significantly more powerful M7.1 mainshock on July 5. This section does not cite any sources. "Some aftershocks have rumbled northwest of the Searles Valley earthquake, approaching the Owens Valley fault. It displaces several of the mapped units of late Quaternary age but does not displace active or older alluvium deposits of late Holocene age. near Johannesburg (Searles Valley) SLIP RATE: between 2 and 11 mm/yr; probably averages about 7 mm per year INTERVAL BETWEEN MAJOR RUPTURES: between 200 and 3000 years, depending on the fault segment PROBABLE MAGNITUDES: M W 6.8 - 7.6 OTHER NOTES: The Garlock fault zone is one of the most obvious geologic features in … Paleoseismic Results from the Christmas Canyon West Site, Central Garlock Fault, Searles Valley, California Kyle A. Peña, Sally F. McGill, Ed J. Rhodes, James F. Dolan, Nathan D. Brown, Bryan A. Castillo, Alexandra E. Hatem, Sourav Saha, & Robert Zinke Submitted August 15, 2019, SCEC Contribution #9831, 2019 SCEC Annual Meeting Poster #107 The Garlock fault is well expressed in the Campo Teresa area. Southern California was just rocked by two major earthquakes only 34 hours and ~7 miles (11 km) apart. 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