Sections were distinguished based on asperities (bends), steps and seismicity.
Section designations after Fischer and Mills (1991 #6468) who designated three segments offshore, two segments onshore south of La Jolla and one southern segment within the Los Angeles basin (thereby implying a northern, 7th segment as well). Slip rate is not fully constrained, but appears to be approximately 1.0☐.5 mm/yr in the north, increasing to 1.5☐.5 mm/yr in the south. Grant and others (1997 #1366) reported evidence for 3–5 earthquakes in the past 11.7 ka, but stated that the recurrence interval varied from 1,200 yr to 3,000 yr. There are three detailed study sites along the fault zone. The intermediate offshore portion is presumed Holocene based on sparse evidence of displacement of presumed young Holocene sediments offshore as well as its continuity to the better-defined onshore sections. The southern onshore portion, through San Diego, is also demonstrably active based on geotechnical and research studies. The northern onshore portion is demonstrably Holocene based on numerous geotechnical studies as well as the historic Long Beach earthquake. Urbanization in the San Diego area has also somewhat limited the accurate location of some of the fault strands. The large central portion of the fault zone is offshore and less well defined. Fault locations onshore and in some limited offshore areas are generally well located. Geological Survey website,, accessed 03:36 AM.ĭata on this fault zone is variable. 127bĬompiled in cooperation with the California Geological SurveyĬitation for this record: Treiman, J.A., and Lundberg, M., compilers, 1999, Fault number 127b, Newport-Inglewood-Rose Canyon fault zone, south Los Angeles Basin section, in Quaternary fault and fold database of the United States: U.S.
Newport-Inglewood-Rose Canyon fault zone, south Los Angeles Basin section (Class A) No. For the most up-to-date information, please refer to the interactive fault map. Qfaults web comp As of January 12, 2017, the USGS maintains a limited number of metadata fields that characterize the Quaternary faults and folds of the United States.
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