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Relation of Known Faults to Surface Ruptures, 1971 San Fernando Earthquake, Southern California

1972; Geological Society of America; Volume: 83; Issue: 6 Linguagem: Inglês

10.1130/0016-7606(1972)83[1601

1943-2674

Richard J. Proctor, Richard Crook, M. H. McKEOWN, R. L. MORESCO,

Earthquake and Tsunami Effects

Research Article| June 01, 1972 Relation of Known Faults to Surface Ruptures, 1971 San Fernando Earthquake, Southern California R. J PROCTOR; R. J PROCTOR Engineering Geology Branch, The Metropolitan Water District of Southern California, P.O. Box 54153, Los Angeles, California 90054 Search for other works by this author on: GSW Google Scholar R CROOK, JR.; R CROOK, JR. Engineering Geology Branch, The Metropolitan Water District of Southern California, P.O. Box 54153, Los Angeles, California 90054 Search for other works by this author on: GSW Google Scholar M. H McKEOWN; M. H McKEOWN Engineering Geology Branch, The Metropolitan Water District of Southern California, P.O. Box 54153, Los Angeles, California 90054 Search for other works by this author on: GSW Google Scholar R. L MORESCO R. L MORESCO Engineering Geology Branch, The Metropolitan Water District of Southern California, P.O. Box 54153, Los Angeles, California 90054 Search for other works by this author on: GSW Google Scholar Author and Article Information R. J PROCTOR Engineering Geology Branch, The Metropolitan Water District of Southern California, P.O. Box 54153, Los Angeles, California 90054 R CROOK, JR. Engineering Geology Branch, The Metropolitan Water District of Southern California, P.O. Box 54153, Los Angeles, California 90054 M. H McKEOWN Engineering Geology Branch, The Metropolitan Water District of Southern California, P.O. Box 54153, Los Angeles, California 90054 R. L MORESCO Engineering Geology Branch, The Metropolitan Water District of Southern California, P.O. Box 54153, Los Angeles, California 90054 Publisher: Geological Society of America Received: 15 Jul 1971 Revision Received: 15 Nov 1971 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1972, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1972) 83 (6): 1601–1618. https://doi.org/10.1130/0016-7606(1972)83[1601:ROKFTS]2.0.CO;2 Article history Received: 15 Jul 1971 Revision Received: 15 Nov 1971 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation R. J PROCTOR, R CROOK, M. H McKEOWN, R. L MORESCO; Relation of Known Faults to Surface Ruptures, 1971 San Fernando Earthquake, Southern California. GSA Bulletin 1972;; 83 (6): 1601–1618. doi: https://doi.org/10.1130/0016-7606(1972)83[1601:ROKFTS]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 Surface rupturing during the February 9, 1971, San Fernando earthquake occurred chiefly along known faults than can be included in the Santa Susana–Sierra Madre fault zone. Most of the surface displacements were associated with known faults that are shown only on unpublished maps. Because the Metropolitan Water District (MWD) has tunnels under construction and others proposed in this area, most of the faults had been studied in detail to determine their respective effects upon groundwater distribution and tunnel construction. These surface breaks and associated faults are described.The area that includes surface ruptures accompanying the San Fernando earthquake extends 19 km (12 mi) from east to west and 6 km (4 mi) from north to south. The largest single vertical displacement observed within this area was 1.5 m (5.0 ft) on the Lakeview thrust fault scarp in Oliver Canyon, 7 km (4.4 mi) east of San Fernando. The maximum cumulative uplift, from MWD surveys of the San Fernando Tunnel north of the Sylmar fault, was 2.3 m (7.5 ft). The maximum horizontal displacement, left-lateral, was 1.9 m (6.2 ft) on the Sylmar fault. The overall north-south shortening was 2.3 m (7.5 ft). First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.