Hollywood fault (Class A) No. 102
Last Review Date: 2000-05-01
citation for this record: Treiman, J.A., compiler, 2000, Fault number 102, Hollywood fault, in Quaternary fault and fold database of the United States: U.S. Geological Survey website, https://earthquakes.usgs.gov/hazards/qfaults, accessed 05/14/2024 12:22 AM.
| Synopsis |
Holocene active sinistral-reverse oblique fault located along the southern side of the eastern Santa Monica Mountains. Fault location is moderately well defined geomorphically (Dolan and others, 1997 #5918); several successive studies have clarified age and history of faulting in the central portion of the zone (Dolan and others, 1997 #5918; Dolan and others, 2000 #5919). Dolan and others (2000 #5919) reported that the most recent paleoevent probably occurred 7–9.5 ka. The penultimate event probably occurred between 11–22 ka. These observations support a latest Quaternary recurrence interval estimate of 6–11 k.y. Dolan and others (1997 #5918) reported a minimum oblique slip rate of 0.35±0.2 mm/yr, based on the assumption that H:V slip components are equal. Dolan and others (1997 #5918) acknowledged that sinistral strike-slip component could be considerably greater than vertical component. |
| Name comments |
Recognition of a fault zone in this vicinity was first published by Lawson and others (1908 #5925); part of "Santa Monica fault" of Wood (1916 #5929); part of "Santa Monica segment" of the "Anacapa Lineament" (Hill, 1928 #4959); Hollywood fault first mapped as a distinct trace and named by Hoots (1931 #5921); Yerkes and others (1965 #5930) and Dibblee (1991 #6511) use "Santa Monica" for all or part (respectively) of the fault.
Fault extends eastward from West Beverly Hills lineament (Dolan and Sieh, 1992 #6462) to Los Angeles River, and may continue eastward as the Raymond fault [103] (Lamar, 1961 #5924; Weaver and Dolan, 2000 #5928). Dibblee (1991 #5916) extends fault west to Sepulveda Canyon this extension discussed as possible, but older, by Dolan and others (1997 #5918). Fault ID: Refers to number 392 (Hollywood fault) of Jennings (1994 #2878) and number 81 (Hollywood fault) of Ziony and Yerkes (1985 #5931). |
| County(s) and State(s) |
LOS ANGELES COUNTY, CALIFORNIA |
| Physiographic province(s) |
PACIFIC BORDER |
| Reliability of location |
Good Compiled at 1:100,000 scale. Comments: Location of fault transferred by inspection from 1:100,000 map of Dolan and others (1997 #5918) and 1:24,000-scale mapping by Dibblee (1989 #7950).
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| Geologic setting |
North-dipping, generally high-angle surface fault is part of east-west frontal fault system (also including Anacapa-Dume [100], Malibu Coast [99], Santa Monica [101], and Raymond [103] faults) that has accommodated 80° of clockwise rotation of the western Transverse Ranges and perhaps as much as 60 km of sinistral slip since early Miocene (Hornafius and others, 1986 #5922); fault includes several parallel traces in subsurface and intermittently at surface; Holocene movement is combination of continued strike-slip and compression (Dolan and others, 1997 #5918; Walls and others, 1998 #5927; Dolan and others, 2000 #5919); left-step at western end to the Santa Monica fault (Dolan and others, 1997 #5918; 2000 #5919); may continue eastward as Raymond fault.
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| Length (km) | 14 km. |
| Average strike | N76°E |
| Sense of movement |
Left lateral, Reverse
Comments: Sense of movement from Dolan and others (1997 #5918).
|
| Dip |
25–90° N.
Comments: Dip of the fault reported to be 50° at Beverly Hills (Yerkes and others, 1965 #5930); 60–95° ( at <60 m depth) and including some shallower dips in the upper 10 m (Dolan and others, 1997 #5918).
|
| Paleoseismology studies |
Site 102-1, Camino Palmero: study utilized a series of adjacent large-diameter borings, in lieu of trenching, to document Holocene fault history; 14C dating provides control for most recent event and possibly penultimate event (Dolan and others, 1997 #5918; 2000 #5919).
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| Geomorphic expression |
Scarps and faceted ridges, active fan deposition along relatively abrupt mountain front (Dolan and Sieh, 1992 #6462; Dolan and others, 1997 #5918).
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| Age of faulted surficial deposits | Holocene alluvial fans/paleosols and late-Quaternary alluvial fans (Dolan and others, 1997 #5918; 2000 #5919); Miocene marine and Cretaceous granitic rock (Dibblee, 1991 #6511). |
| Historic earthquake | |
| Most recent prehistoric deformation |
latest Quaternary (<15 ka)
Comments: Most recent event occurred 6–11 k.y. ago but most probably between 7–9.5 ka (Dolan and others, 2000 #5919).
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| Recurrence interval |
Comments: Long recurrence intervals are suggested by the data presented by Dolan and others (2000 #5919). They interpret most recent event between 6 to 11 ka and penultimate event between 11 to 22 ka. |
| Slip-rate category |
Between 1.0 and 5.0 mm/yr
Comments: Dolan and others (1997 #5918) reported a minimum oblique slip rate of 0.35(0.2 mm/yr minimum oblique slip rate assumes 1:1 H/V ratio with acknowledgement that strike-slip component could be considerably greater). Clark and others (1984 #2876) suggest a slip rate of 0.33–0.75 mm/yr based on vertical separation only; value does not take into account sinistral component. Slip rate assigned by Petersen and others (1996 #4860) for probabilistic seismic hazard assessment for the State of California was 1.0 mm/yr (with minimum and maximum assigned slip rates of 0.5 mm/yr and 1.5 mm/yr, respectively). |
| Date and Compiler(s) |
2000
Jerome A. Treiman, California Geological Survey |
| References |
#2876 Clark, M.M., Harms, K.H., Lienkaemper, J.J., Harwood, D.S., Lajoie, K.R., Matti, J.C., Perkins, J.A., Rymer, M.J., Sarna-Wojcicki, A.M., Sharp, R.V., Sims, J.D., Tinsley, J.C., III, and Ziony, J.I., 1984, Preliminary slip rate table and map of late Quaternary faults of California: U.S. Geological Survey Open-File Report 84-106, 12 p., 5 plates, scale 1:1,000,000. #7950 Dibblee, T.W., Jr., 1989, Geologic map of the Los Angeles quadrangle, Los Angeles County, California: Dibblee Geological Foundation Map #DF-22, scale 1:24,000. #5916 Dibblee, T.W., Jr., 1991, Geologic map of the Hollywood and Burbank quadrangles, Los Angeles County, California: Dibblee Geological Foundation Map DF-30, 1 sheet, scale 1:24,000. #6511 Dibblee, T.W., Jr., 1991, Geologic map of the Beverly Hills and Van Nuys quadrangles, Los Angeles County, California: Dibblee Geological Foundation Map DF-31, 1 sheet, scale 1:24,000. #6462 Dolan, J.F., and Sieh, K., 1992, Tectonic geomorphology of the northern Los Angeles basin: seismic hazards and kinematics of young fault movement, in Ehlig, P.L., and Steiner, E.A., eds., Engineering geology field trips: Orange County, Santa Monica Mountains, Malibu, Association of Engineering Geologists, Southern California Section, 35th Annual Meeting, Long Beach, October 2-9, 1992, p. B20-B26. #5918 Dolan, J.F., Sieh, K., Rockwell, T.K., Guptill, P., and Miller, G., 1997, Active tectonics, paleoseismology, and seismic hazards of the Hollywood fault, northern Los Angeles basin, California: Bulletin of the Geological Society of America, v. 109, p. 1595-1616. #5919 Dolan, J.F., Stevens, D., and Rockwell, T.K., 2000, Paleoseismologic evidence for an early to mid-Holocene age of the most recent surface rupture on the Hollywood fault, Los Angeles, California: Bulletin of the Seismological Society of America, v. 90, no. 2, p. 334-344. #4959 Hill, R.T., 1928, Southern California geology and Los Angeles earthquakes: Los Angeles, Southern California Academy of Sciences, 232 p. #5921 Hoots, H.W., 1931, Geology of the eastern part of the Santa Monica Mountains, Los Angeles County, California: U.S. Geological Survey Professional Paper 165-C, p. 83-134, scale 1:24,000. #5922 Hornafius, J.S., Luyendyk, B.P., Terres, R.R., and Kamerling, M.J., 1986, Timing and extent of Neogene tectonic rotation in the western Transverse Ranges, California: Geological Society of America Bulletin, v. 97, p. 1476-1487. #2878 Jennings, C.W., 1994, Fault activity map of California and adjacent areas, with locations of recent volcanic eruptions: California Division of Mines and Geology Geologic Data Map 6, 92 p., 2 pls., scale 1:750,000. #5924 Lamar, D.L., 1961, Structural evolution of the northern margin of the Los Angeles Basin: Los Angeles, University of California, unpublished Ph.D. dissertation, 142 p. #5925 Lawson, A.C., Gilbert, G.K., Reid, H.F., Branner, J.C., Leuschner, A.O., Davidson, G., Burckhalter, C., and Campbell, W.W., 1908, Atlas of maps and seismograms accompanying the report of the State Earthquake Investigation Commission upon the California earthquake of April 18, 1906: Carnegie Institution of Washington Publication 87. #4860 Petersen, M.D., Bryant, W.A., Cramer, C.H., Cao, T., Reichle, M.S., Frankel, A.D., Lienkaemper, J.J., McCrory, P.A., and Schwartz, D.P., 1996, Probabilistic seismic hazard assessment for the State of California: California Department of Conservation, Division of Mines and Geology Open-File Report 96-08 (also U.S. Geological Open-File Report 96-706), 33 p. #5927 Walls, C., Rockwell, T., Mueller, K., Bock, Y., Williams, S., Pfanner, J., Dolan, J., and Fang, P., 1998, Escape tectonics in the Los Angeles metropolitan region and implications for seismic risk: Nature, v. 394, p. 356-360. #5928 Weaver, K.D., and Dolan, J.F., 2000, Paleoseismology and geomorphology of the Raymond fault, Los Angeles County, California: Bulletin of the Seismological Society of America, v. 90, p. 1409-1429. #5929 Wood, H.O., 1916, California earthquakes, a synthetic study of recorded shocks: Bulletin of the Seismological Society of America, v. 6, p. 55-180. #5930 Yerkes, R.F., McCulloh, T.H., Schoellhamer, J.E., and Vedder, J.G., 1965, Geology of the Los Angeles Basin, California—An introduction: U.S. Geological Survey Professional Paper 420-A, 57 p. #5931 Ziony, J.I., and Yerkes, R.F., 1985, Evaluating earthquake and surface faulting potential, in Ziony, J.I., ed., Evaluating earthquake hazards in the Los Angeles region—An earth-science perspective: U.S. Geological Survey Professional Paper 1360, p. 43–91. |