Diffuse interseismic deformation across the Pacific–North America plate boundary

Abstract

Research Article| April 01, 2007 Diffuse interseismic deformation across the Pacific–North America plate boundary Shimon Wdowinski; Shimon Wdowinski 1Division of Marine Geology and Geophysics, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149-1098, USA Search for other works by this author on: GSW Google Scholar Bridget Smith-Konter; Bridget Smith-Konter 2Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92093-0210, USA Search for other works by this author on: GSW Google Scholar Yehuda Bock; Yehuda Bock 2Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92093-0210, USA Search for other works by this author on: GSW Google Scholar David Sandwell David Sandwell 2Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92093-0210, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Shimon Wdowinski 1Division of Marine Geology and Geophysics, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149-1098, USA Bridget Smith-Konter 2Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92093-0210, USA Yehuda Bock 2Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92093-0210, USA David Sandwell 2Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92093-0210, USA Publisher: Geological Society of America Received: 04 May 2006 Revision Received: 15 Nov 2006 Accepted: 20 Nov 2006 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2007) 35 (4): 311–314. https://doi.org/10.1130/G22938A.1 Article history Received: 04 May 2006 Revision Received: 15 Nov 2006 Accepted: 20 Nov 2006 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Shimon Wdowinski, Bridget Smith-Konter, Yehuda Bock, David Sandwell; Diffuse interseismic deformation across the Pacific–North America plate boundary. Geology 2007;; 35 (4): 311–314. doi: https://doi.org/10.1130/G22938A.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 Crustal movements and deformation within the diffuse Pacific–North America (Pa-NA) plate boundary are dominated by the right-lateral motion between the two plates. By using the Pa-NA pole of rotation (PoR) spherical coordinate system, we decompose observed crustal movements into parallel and normal components to the Pa-NA plate motion. We transformed the 840 velocity vectors of the Southern California Earthquake Center (SCEC) 3.0 velocity field into the Pa-NA PoR system in order to characterize the interseismic velocity across the plate boundary. Our results show that despite the very different deformation styles occurring across the San Andreas fault, the fault trace follows the half plate motion contour. Deviation occurs in the southern section, where the half motion contour correlates with the San Jacinto and Imperial fault segments. Our analysis yields interesting asymmetric patterns in both parallel and normal components. The parallel component shows asymmetrical velocity gradients across the San Andreas fault, and the normal component indicates compression southwest of the Big Bend, but not northeastward. The observations are compared with visco-elastic modeling results, which show a similar velocity field. The main disagreements between the observations and the model are in a narrow band along the San Andreas fault and in the Mojave block, suggesting that crustal heterogeneities and additional unmodeled fault segments should be considered in future models. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.