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- W2057422021 abstract "Research Article| January 01, 1997 Stochastic Point-Source Modeling of Ground Motions in the Cascadia Region Gail M. Atkinson; Gail M. Atkinson Department of Earth Sciences Carleton University Ottawa, Ont. K1S 5B6 (613) 623-3240 (phone and FAX) email: gma@ccs.carleton.ca (G.M.A.) Search for other works by this author on: GSW Google Scholar David M. Boore David M. Boore U.S. Geological Survey 345 Middlefield Rd. Menlo Park, Ca. 94025 (415) 329-5616 email: boore@somoa.wr.usgs.gov (D.M.B.) Search for other works by this author on: GSW Google Scholar Seismological Research Letters (1997) 68 (1): 74–85. https://doi.org/10.1785/gssrl.68.1.74 Article history first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Gail M. Atkinson, David M. Boore; Stochastic Point-Source Modeling of Ground Motions in the Cascadia Region. Seismological Research Letters 1997;; 68 (1): 74–85. doi: https://doi.org/10.1785/gssrl.68.1.74 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 SocietySeismological Research Letters Search Advanced Search Abstract A stochastic model is used to develop preliminary ground motion relations for the Cascadia region for rock sites. The model parameters are derived from empirical analyses of seismographic data from the Cascadia region. The model is based on a Brune point-source characterized by a stress parameter of 50 bars. The model predictions are compared to ground-motion data from the Cascadia region and to data from large earthquakes in other subduction zones. The point-source simulations match the observations from moderate events (M < 7) in the Cascadia region. The simulations predict a steeper attenuation than observed for very large subduction events (M > 7.5) in other regions; motions are overpredicted near the earthquake source and underpredicted at large distances (> 100 km). The discrepancy at large magnitudes suggests further work on modeling finite-fault effects and regional attenuation is warranted. In the meantime, the preliminary equations are satisfactory for predicting motions from events of M < 7 and provide conservative estimates of motions from larger events at distances less than 100 km. 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." @default.
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- W2057422021 title "Stochastic Point-Source Modeling of Ground Motions in the Cascadia Region" @default.
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