Block Models of Crustal Motion in Southern California Constrained by GPS Measurements

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Block Models of Crustal Motion in Southern California Constrained by GPS Measurements

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dc.contributor.author Meade, Brendan J.
dc.contributor.author Hager, Bradford H.
dc.date.accessioned 2009-10-22T18:55:24Z
dc.date.issued 2005
dc.identifier.citation Meade, Brendan J., and Bradford H. Hager. 2005. Block models of crustal motion in southern California constrained by GPS measurements. Journal of Geophysical Research 110(B03403): 1-19. en_US
dc.identifier.issn 0148-0227 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:3354159
dc.description.abstract We estimate slip rates on major active faults in southern California using a block model constrained by Global Positioning System measurements of interseismic deformation. The block model includes the effects of block rotation and elastic strain accumulation consistent with a simple model of the earthquake cycle. Our estimates of the right-lateral strike-slip rate on the San Andreas fault vary by at least a factor of 5, from a high of 35.9 ± 0.5 mm/yr in the Carrizo Plain to a low of 5.1 ± 1.5 mm/yr through the San Bernadino segment. Shortening across the Puente Hills Thrust and left-lateral slip on the Raymond Hill fault are consistent with both thickening and escape tectonics in the Los Angeles Basin. Discrepancies between geodetic and geologic slip rate estimates along the San Andreas and San Jacinto faults, as well as in the Eastern California Shear Zone, may be explained by a temporal change in fault system behavior. We find no substantial evidence for long-term postseismic relaxation and infer that the viscosity of the lower crust/upper mantle may be relatively high (η > 1019 Pa s). en_US
dc.description.sponsorship Earth and Planetary Sciences en_US
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.isversionof http://dx.doi.org/10.1029/2004JB003209 en_US
dash.license META_ONLY
dc.title Block Models of Crustal Motion in Southern California Constrained by GPS Measurements en_US
dc.type Journal Article en_US
dc.description.version Version of Record en_US
dc.relation.journal Journal of Geophysical Research -All Series- en_US
dash.depositing.author Meade, Brendan J.
dash.embargo.until 10000-01-01

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  • FAS Scholarly Articles [6929]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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