Seismic Slip Distribution along the San Jacinto Fault Zone, Southern California, and Its Implications

Research Article| August 01, 1975 Seismic Slip Distribution along the San Jacinto Fault Zone, Southern California, and Its Implications WAYNE THATCHER; WAYNE THATCHER 1National Center for Earthquake Research, U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar JAMES A. HILEMAN; JAMES A. HILEMAN 2Seismological Laboratory, California Institute of Technology, Pasadena, California 91109 Search for other works by this author on: GSW Google Scholar THOMAS C. HANKS THOMAS C. HANKS 3Seismological Laboratory and Earthquake Engineering Research Laboratory, California Institute of Technology, Pasadena, California 91109 Search for other works by this author on: GSW Google Scholar Author and Article Information WAYNE THATCHER 1National Center for Earthquake Research, U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 JAMES A. HILEMAN 2Seismological Laboratory, California Institute of Technology, Pasadena, California 91109 THOMAS C. HANKS 3Seismological Laboratory and Earthquake Engineering Research Laboratory, California Institute of Technology, Pasadena, California 91109 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1975) 86 (8): 1140–1146. https://doi.org/10.1130/0016-7606(1975)86<1140:SSDATS>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation WAYNE THATCHER, JAMES A. HILEMAN, THOMAS C. HANKS; Seismic Slip Distribution along the San Jacinto Fault Zone, Southern California, and Its Implications. GSA Bulletin 1975;; 86 (8): 1140–1146. doi: https://doi.org/10.1130/0016-7606(1975)86<1140:SSDATS>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 The amount and distribution of seismic slip along 240 km of the San Jacinto fault zone between Cajon Pass and Superstition Mountain has been obtained from determinations of seismic moment and estimates of source dimension for each of the nine moderate earthquakes (6 < M < 7) which have occurred there since 1890.There are two significant gaps in seismic slip, one between Cajon Pass and Riverside, the other from Anza to Coyote Mountain. Each is about 40 km long and both are characterized by complex fault zones and a currently high level of minor seismicity (M < 5). No aseismic fault creep has been identified on either segment. These gaps may mark the sites of the next moderate earthquakes (M = 6 → 7) to occur along the San Jacinto fault zone. The two remaining sections of the fault, Riverside and Anza, and Coyote Mountain to Superstition Mountain, may have been ruptured along their entire lengths, in 1890–1923 and 1942–1968, respectively. This content is PDF only. Please click on the PDF icon to access. 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.