Adjustable Generic Ground‐Motion Prediction Equation Based on Equivalent Point‐Source Simulations: Accounting for Kappa Effects

Research Article| March 13, 2018 Adjustable Generic Ground‐Motion Prediction Equation Based on Equivalent Point‐Source Simulations: Accounting for Kappa Effects Behzad Hassani; Behzad Hassani Search for other works by this author on: GSW Google Scholar Gail M. Atkinson Gail M. Atkinson Search for other works by this author on: GSW Google Scholar Author and Article Information Behzad Hassani Gail M. Atkinson Publisher: Seismological Society of America First Online: 13 Mar 2018 Online Issn: 1943-3573 Print Issn: 0037-1106 © Seismological Society of America Bulletin of the Seismological Society of America (2018) 108 (2): 913–928. https://doi.org/10.1785/0120170333 Article history First Online: 13 Mar 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Behzad Hassani, Gail M. Atkinson; Adjustable Generic Ground‐Motion Prediction Equation Based on Equivalent Point‐Source Simulations: Accounting for Kappa Effects. Bulletin of the Seismological Society of America 2018;; 108 (2): 913–928. doi: https://doi.org/10.1785/0120170333 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 SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract We modified the simulation‐based generic ground‐motion prediction equation (GMPE) model proposed by Yenier and Atkinson (2015b) to enable adjustments for the near‐surface attenuation parameter commonly referred to as kappa (⁠κ0⁠). This enhances the usefulness of the model in applications over a broad range of site conditions from hard rock to soil. The new model is developed for magnitudes M 3–9.6 and rupture distances up to 1000 km, for peak ground acceleration (PGA), peak ground velocity (PGV), and 5% damped pseudospectral acceleration (PSA) at frequencies from 0.1 to 100 Hz. The proposed κ0 scaling term in the GMPE is a function of κ0⁠, magnitude, and stress parameter, and facilitates simultaneous inversion of response spectral amplitudes to estimate best‐fit values of κ0 for a specific site condition and region, along with best‐fit values for event stress parameters and regional attenuation. We check the applicability of the modified generic GMPE to the empirical data in California, using the Next Generation Attenuation‐West2 database. We determine an optimal κ0 value of 0.04 s for the B/C boundary site condition (travel‐time weighted average shear‐wave velocity over the top 30 m, VS30=760 m/s⁠) for sites in California, through inversion of response spectral amplitudes from 1 to 20 Hz. The modified generic GMPE formulation provides a fully adjustable model that can be calibrated to the source, path, and site conditions for any region of interest. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.