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Control of seafloor roughness on earthquake rupture behavior

2003; Geological Society of America; Volume: 31; Issue: 5 Linguagem: Inglês

10.1130/0091-7613(2003)031 2.0.co;2

1943-2682

S. L. Bilek, S. Y. Schwartz, Heather R. DeShon,

High-pressure geophysics and materials

Research Article| May 01, 2003 Control of seafloor roughness on earthquake rupture behavior Susan L. Bilek; Susan L. Bilek 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA Search for other works by this author on: GSW Google Scholar Susan Y. Schwartz; Susan Y. Schwartz 2 Earth Sciences Department, and Institute of Geophysics and Planetary Physics, University of California, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar Heather R. DeShon Heather R. DeShon 2 Earth Sciences Department, and Institute of Geophysics and Planetary Physics, University of California, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar Geology (2003) 31 (5): 455–458. https://doi.org/10.1130/0091-7613(2003)031 2.0.CO;2 Article history received: 18 Oct 2002 rev-recd: 28 Jan 2003 accepted: 29 Jan 2003 first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Susan L. Bilek, Susan Y. Schwartz, Heather R. DeShon; Control of seafloor roughness on earthquake rupture behavior. Geology 2003;; 31 (5): 455–458. doi: https://doi.org/10.1130/0091-7613(2003)031 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 SocietyGeology Search Advanced Search Abstract Earthquake rupture complexity is described for three recent large underthrusting earthquakes along the Costa Rican subduction zone, the 1983 Osa, 1990 Nicoya Gulf, and 1999 Quepos events. These earthquakes occurred in regions characterized by distinctly different morphologic features on the subducting plate. The 1990 and 1999 events occurred along linear projections of subducting seamount chains and had fairly simple earthquake rupture histories. Both events are interpreted as failure of the basal contact of closely spaced isolated seamounts acting as asperities. In contrast, the 1983 event occurred along the subducting Cocos Ridge and had a complex rupture history. Comparison of rupture characteristics of these large underthrusting earthquakes with size and location of subducting features provides evidence that seamounts can be subducted to seismogenic depths and that variations in seafloor bathymetry of the subducting plate strongly influence the earthquake rupture process. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.