NGA West-2 Documentation

Enhancement of Next Generation Attenuation Relationships for Western US (NGA-West2)

PEER’s NGA-West2 Program, one of PEER's largest multi-year multidisciplinary mega research projects, is reaching its conclusion on various tasks and the first of its final products are now available! These products include many published reports describing the newly updated ground motion models (GMMs) and other research studies supporting GMM development, along with the NGA-West2 Database Flatfile.

NGA West-2 Main Page

NGA-West2 Flatfiles and GMM Reports



NGA East Documentation

Next Generation Attenuation Relationships for Central & Eastern North-America (NGA-East)

NGA-East is a multi-disciplinary research project coordinated by the Pacific Earthquake Engineering Research center (PEER), with headquarters at the University of California, Berkeley. The project involves a large number of participating researchers from various organizations in academia, industry and government. The project is jointly 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).

NGA East Main Page




NGA West-1 Documentation

The following documentation is for the past version of the database tool, which is no longer supported. However, the documentation my provide additional insight into the current tool.
The user manual provides detailed information on all aspects and features of the web application. The manual was expanded from a version originally developed for the Design Ground motion database (DGML).

User Manual (pdf 3.0MB )

The technical report describes the theory behind the web application including a detailed description of how it searches records from the database. The report discusses the evolution of scaling ground motion records, presents various procedures that have been historically used for scaling, and introduces the method that has been implemented in the current application. It also describes the development of the database records and how they were rotated in this version of the database.

Technical Report (pdf 0.7 MB)

Several short video tutorials have also been created to demonstrate how to use the web application for searching, selecting, and scaling ground motions in the database.