Journal
EARTHQUAKE SPECTRA
Volume 37, Issue 1_SUPPL, Pages 1331-1353Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/87552930211015695
Keywords
Database; ground motion; stable continental region; SCR; earthquake; NGA-East; NGA; CENA
Categories
Funding
- Pacific Earthquake Engineering Research center (PEER), as part of the NGA-East research project
- U.S. Department of Energy (DOE)
- Electric Power Research Institute (EPRI)
- U.S. Geological Survey (USGS)
- U.S. Nuclear Regulatory Commission (NRC)
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The NGA-East Project developed a large earthquake ground motion database for the CENA region, including over 27,000 time series and pseudo-spectral acceleration data from 82 earthquakes. This database underwent multiple quality checks and is one of the largest in stable continental regions currently available.
This article documents the earthquake ground motion database developed for the NGA-East Project, initiated as part of the Next Generation Attenuation (NGA) research program and led by the Pacific Earthquake Engineering Research Center (PEER). The project was focused on developing a ground motion characterization model (GMC) model for horizontal ground motions for the large region referred to as Central and Eastern North America (CENA). The CENA region covers most of the U.S. and Canada, from the Rocky Mountains to the Atlantic Ocean and is characterized tectonically as a stable continental region (SCR). The ground-motion database includes the two- and three-component ground-motion recordings from numerous selected events relevant to CENA (M > 2.5, with distances up to 3500 km) that have been recorded since 1976. The final database contains over 27,000 time series from 82 earthquakes and 1271 recording stations. The ground motion database includes uniformly processed time series, 5% damped pseudo-spectral acceleration (PSA) median-component ordinates for 429 periods ranging from 0.01 to 10 s, duration and Arias intensity in 5% increments, and Fourier amplitude spectra for different time windows. Ground motions and metadata for source, path, and site conditions were subjected to quality checks by topical working groups and the ground-motion model (GMM) developers. The NGA-East database constitutes the largest database of processed recorded ground motions in SRCs and is publicly available from the PEER ground-motion database website.
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