  SMiRT-22 Special Session onNew Developments for Ground Motion Prediction for Stable Continental RegionsIncluding NGA-East: Next Generation Attenuation Relationships for Central and Eastern North America Quantification of seismic risk for beyond design-basis events is a mandate for many utilities that need to be performed in the next 3 to 5 years. The key input parameter for such evaluation is the seismic ground motion hazard. This one-day special session is focused on the recent developments for ground motions in stable continental regions (SCRs) that draw on global seismic data for better and more up-to-date characterization of ground motion. We open the day with an overview of the lessons learned from a recent SSHAC Level 4 seismic hazard assessment project conducted for Swiss utilities. This is followed by an overview of the recently completed SSHAC Level 3 Seismic Source Characterization project for the Central and Eastern U.S. (CEUS SSC). The core of the special session is then focused on the NGA-East project, the Ground Motion Characterization (GMC) project to be used with the corresponding SSC. It is expected that the results from this multi-year development project will be used by many utilities in CEUS and other SCR regions worldwide. Important issues relevant to SCRs are addressed and the approach to solve the challenges is presented in the context of NGA-East. We conclude with a discussion. NGA-East is the Next Generation Attenuation project targeted to the central and eastern North America region, but it addresses issues common to SCRs around the world. NGA-East is a major multi-disciplinary project coordinated by the Pacific Earthquake Engineering Research Center (PEER). The project is co-sponsored by the U.S. Nuclear Regulatory Commission (NRC), the U.S. Department of Energy (DOE), the Electric Power Research Institute (EPRI) and the U.S. Geological Survey (USGS). This project follows and builds upon the original NGA-West project that focused on the active tectonic regions. The project will develop a set of new ground motion prediction equations (GMPEs) for median and standard deviation of ground motions and their associated weights in the logic-trees for use in probabilistic seismic hazard analyses (PSHA). NGA-East consists of two parts: 1) a science development phase and 2) a model building phase (SSHAC Level 3 part of the project). In order to develop new GMPEs, NGA-East will rely on ground motion simulations to supplement the ground motion database developed for the project. Important scientific issues are addressed through targeted research projects on the regionalization of seismic source, path and attenuation of motions, local linear and nonlinear site response characterization and the treatment of variability and uncertainties. Seven working groups have been formed to cover the complexity and breadth of topics in the NGA-East project, each focused on a specific technical area. An overview of the project will be presented followed by highlights on recent progress on key technical topics including database development, definition of reference rock conditions, regionalization of crustal properties, source and path issues and ground motion simulation validation. This all day special session is open for all those who are registered for SMiRT-22 conference and no additional registration is required. For those who plan to attend only this special session on Friday, August 23, 2013, and are not registered for SMiRT-22, a one-day registration is required. Please download the one-day registration form by clicking here. Complete, sign, and email it as directed on the form.
Preliminary Agenda forSMiRT-22 Conference Special Session onSeismic Hazard in Stable Continental Regions and NGA-EastFriday, August 23, 2013 Yerba Buena Ballroom San Francisco Marriott Marquis 55 Fourth Street, San Francisco, California, 94103, USA 08:30-08:45 | Introduction to the SMiRT special session on ground motion hazard in SCRs (Y. Bozorgnia) | 08:45-09:15 | Lessons learned from the seismic hazard assessment of NPPs in Switzerland (P. Renault) | 09:15-10:15 | Overview of SSHAC Level 3 project on Seismic Source Characterization of Central Eastern U.S. (L. Salomone, K. Coppersmith) | 10:15-10:45 | Break | 10:45-11:30 | Overview of NGA-East: Ground Motion Characterization for Central and Eastern North America: project scope and today's topics (C. Goulet, N. Abrahamson) | 11:30-12:00 | Ground motion database for SCRs: development, attributes and products (C. Cramer) | 12:00-12:30 | Reference rock and kappa issues (A.Kottke) | 12:30-13:30 | Lunch | 13:30-14:00 | Regionalization: database of crustal properties, 1D crustal regionalization and effects on ground motions (W. Mooney) | 14:00-14:30 | Evaluation of regional path/source effects from recent earthquake recordings (M. Chapman) | 14:30-15:00 | Summary of Geometrical spreading and Q models from recent events (R. Graves) | 15:00-15:30 | Break | 15:30-16:00 | Ground motion simulations validation - process and summary of results (C. Goulet) | 16:00-16:30 | Remaining issues and development of preliminary GMPEs (N. Abrahamson) | 16:30-17:00 | Discussions and closing remarks (Y. Bozorgnia, N. Abrahamson, C. Goulet and P. Renault) |
(If you are not registered for SMiRT-22 conference, a one-day registration for this special session is required and the Registration Form can be obtained here.)
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