Long-range and long-term fault interactions in Southern California

Research Article| September 01, 2007 Long-range and long-term fault interactions in Southern California James F. Dolan; James F. Dolan 1Department of Earth Sciences, University of Southern California, Los Angeles, California 90089-0740, USA Search for other works by this author on: GSW Google Scholar David D. Bowman; David D. Bowman 2Department of Geological Sciences, California State University, Fullerton, California 92834-6850, USA Search for other works by this author on: GSW Google Scholar Charles G. Sammis Charles G. Sammis 3Department of Earth Sciences, University of Southern California, Los Angeles, California 90089-0740, USA Search for other works by this author on: GSW Google Scholar Author and Article Information James F. Dolan 1Department of Earth Sciences, University of Southern California, Los Angeles, California 90089-0740, USA David D. Bowman 2Department of Geological Sciences, California State University, Fullerton, California 92834-6850, USA Charles G. Sammis 3Department of Earth Sciences, University of Southern California, Los Angeles, California 90089-0740, USA Publisher: Geological Society of America Received: 18 Jul 2006 Revision Received: 24 Apr 2007 Accepted: 04 May 2007 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2007) 35 (9): 855–858. https://doi.org/10.1130/G23789A.1 Article history Received: 18 Jul 2006 Revision Received: 24 Apr 2007 Accepted: 04 May 2007 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation James F. Dolan, David D. Bowman, Charles G. Sammis; Long-range and long-term fault interactions in Southern California. Geology 2007;; 35 (9): 855–858. doi: https://doi.org/10.1130/G23789A.1 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 SocietyGeology Search Advanced Search Abstract Paleoseismological data suggest the occurrence of four bursts of seismic moment release in the Los Angeles region during the past 12,000 yr. The historic period appears to be part of an ongoing lull that has persisted for about the past 1000 yr. These periods of rapid seismic displacement in the Los Angeles region have occurred during the lulls between similar bursts of activity observed on the eastern California shear zone in the Mojave Desert, which is now seismically active. A kinematic model in which the faults of the greater San Andreas system suppress activity on faults in the eastern California shear zone, and vice versa, can explain the apparent switching of activity between the two fault networks. Combined with the observation that short-term geodetic and longer-term geologic rates covary on major southern California fault systems, this suggests that either (1) a temporal cluster of seismic displacements on upper-crustal faults increases ductile deformation on their downward extensions, or (2) rapid ductile slip in the lower crust beneath faults loads the upper crust, driving a seismic cluster. We suggest that alternating periods of rapid seismic displacement may be the expected mode of seismicity when two fault systems accommodate the same plate-boundary motion, and slip on one system suppresses slip on the other. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.