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Active parasitic folds on the Elysian Park anticline: Implications for seismic hazard in central Los Angeles, California

2000; Geological Society of America; Volume: 112; Issue: 5 Linguagem: Inglês

10.1130/0016-7606(2000)112 2.0.co;2

1943-2674

M. E. Oskin, Kerry Sieh, T. Rockwell, Grant Miller, Paul Guptill, Matthew C. Curtis, Stéphanie McArdle, Paul Elliot,

Earthquake Detection and Analysis

Research Article| May 01, 2000 Active parasitic folds on the Elysian Park anticline: Implications for seismic hazard in central Los Angeles, California Michael Oskin; Michael Oskin 1Seismological Laboratory 252-21, California Institute of Technology, Pasadena, California 91125, USA Search for other works by this author on: GSW Google Scholar Kerry Sieh; Kerry Sieh 1Seismological Laboratory 252-21, California Institute of Technology, Pasadena, California 91125, USA Search for other works by this author on: GSW Google Scholar Thomas Rockwell; Thomas Rockwell 2Department of Geological Sciences, San Diego State University, San Diego, California 92182, USA Search for other works by this author on: GSW Google Scholar Grant Miller; Grant Miller 3Advanced Earth Sciences, Incorporated, 13700 Alton Parkway, Suite 163, Irvine, California 92618, USA Search for other works by this author on: GSW Google Scholar Paul Guptill; Paul Guptill 4GeoSyntec, 2100 Main Street, Suite 150, Huntington Beach, California 92648, USA Search for other works by this author on: GSW Google Scholar Matthew Curtis; Matthew Curtis 5Earth Technology Corporation, 100 West Broadway, Long Beach, California 90802, USA Search for other works by this author on: GSW Google Scholar Steve McArdle; Steve McArdle 6Law/Crandall, Incorporated, 200 Citadel Drive, Los Angeles, California 90040, USA Search for other works by this author on: GSW Google Scholar Paul Elliot Paul Elliot 6Law/Crandall, Incorporated, 200 Citadel Drive, Los Angeles, California 90040, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Michael Oskin 1Seismological Laboratory 252-21, California Institute of Technology, Pasadena, California 91125, USA Kerry Sieh 1Seismological Laboratory 252-21, California Institute of Technology, Pasadena, California 91125, USA Thomas Rockwell 2Department of Geological Sciences, San Diego State University, San Diego, California 92182, USA Grant Miller 3Advanced Earth Sciences, Incorporated, 13700 Alton Parkway, Suite 163, Irvine, California 92618, USA Paul Guptill 4GeoSyntec, 2100 Main Street, Suite 150, Huntington Beach, California 92648, USA Matthew Curtis 5Earth Technology Corporation, 100 West Broadway, Long Beach, California 90802, USA Steve McArdle 6Law/Crandall, Incorporated, 200 Citadel Drive, Los Angeles, California 90040, USA Paul Elliot 6Law/Crandall, Incorporated, 200 Citadel Drive, Los Angeles, California 90040, USA Publisher: Geological Society of America Received: 12 Dec 1998 Revision Received: 26 Jul 1999 Accepted: 16 Aug 1999 First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2000) 112 (5): 693–707. https://doi.org/10.1130/0016-7606(2000)112 2.0.CO;2 Article history Received: 12 Dec 1998 Revision Received: 26 Jul 1999 Accepted: 16 Aug 1999 First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Michael Oskin, Kerry Sieh, Thomas Rockwell, Grant Miller, Paul Guptill, Matthew Curtis, Steve McArdle, Paul Elliot; Active parasitic folds on the Elysian Park anticline: Implications for seismic hazard in central Los Angeles, California. GSA Bulletin 2000;; 112 (5): 693–707. doi: https://doi.org/10.1130/0016-7606(2000)112 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract We characterize the seismic hazard of the Elysian Park fault, a blind reverse fault beneath central Los Angeles, by analysis of the Elysian Park anticline, which overlies it. New shallow-subsurface geotechnical data, combined with other surficial stratigraphy and geomorphology, reveal that the Elysian Park anticline is an active 20-km-long structure. From the style and rates of deformation of parasitic folds on the southern limb of the anticline, we estimate a contraction rate of 0.6–1.1 mm/yr. This rate provides a basis for estimating a rate of contraction of the entire Elysian Park anticline, which in turn allows us to estimate a 0.8–2.2 mm/yr time-averaged rate of slip on the underlying fault. At this rate of slip, rupture of the Elysian Park fault could produce a nominal Mw 6.2 to 6.7 earthquake every 500 to 1300 yr, on average. Although this Elysian Park earthquake would recur infrequently, its size and recurrence interval may be similar to those estimated for the sources of the destructive 1971 San Fernando and 1994 Northridge earthquakes. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.