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Introduced in the Help System two additional references to publications discussing issues of record filtering, plus other minor changesĤ. Default decimal places changed to 5 (amongst other things, to facilitate reproduction of results when reopening and reprocessing saved records)ģ. Extended coverage of cases where user is advised to save the file in DOS/Windows text format before trying to open it in SeismoSignalĢ. Introduced in the General Settings the possibility of disabling background shading of plots (useful for printing purposes) Other minor updatesġ. Created a user defined default directory for input accelerograms (as well as one for saving data)Ħ. Introduced the possibility of using comma as decimal separatorĥ. Introduced possibility of users saving the computed spectra (in a format compatible with SeismoSpect and SeismoMatch)Ĥ. Enabled the visualisation of Ground Motion Parameters for both unfiltered and filtered recordsģ. Increased the maximum allowed number of accelerogram data points from 2^15 (still the maximum for Fourier and Power spectra analysis) to 2^18, i.e. Various enhancements to the database have been made in recent years, and the latest version of the database can be found at the top of this web page.1. Finally, PEER created the online database to make all the information available to the public. The following step was to gather related metadata such as earthquake magnitude, various site-to-source distance measures, style of faulting, local site conditions at the recording stations, and other relevant engineering parameters. The second step was to ensure that all the data had been processed consistently and reliably. The first step was to collect the most important ground motion records worldwide. In the late 1990s PEER recognized the need to improve access to earthquake ground motion data and thus embarked on an effort to create a web-based searchable database of strong ground motion data.
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Historically, access to earthquake ground motion data has been hampered by difficult access to the large body of data, as well as by the inconsistency in how the data are gathered and stored. Modern approaches to assessing seismic performance of infrastructure rely on good information about likely ground shaking at a site. These old database versions are not accessible. Previous versions were released in 2005, 2000, and 2010. Previous PEER Ground Motion Databasesįor many years, PEER has spent considerable effort in collecting and organizing ground motion databases to assure data processing consistency and accurate metadata retrieval. The database is now cited as a primary source of ground motion records in the latest revision of the Building Seismic Safety Councils NEHRP Recommended Provisions. Since its release, the PEER Ground Motion database has proved to be very popular among engineers in the earthquake-related disciplines, who are increasingly using it for selection and modification of records to analyze computer models of buildings, bridges, and other facilities. The database has one of the most comprehensive sets of metadata, including different distance measures, various site characterizations, and earthquake source data. The Pacific Earthquake Engineering Research Center (PEER) ground motion database includes a very large set of ground motions recorded worldwide of shallow crustal earthquakes in active tectonic regimes. The new NGA-West 2 Database is larger than the old database by a factor of six, and also new features have been added to the new online tool. Department of Energy (DOE), the Electric Power Research Institute (EPRI) and the U.S. Nuclear Regulatory Commission (NRC), the U.S. NGA-East was jointly sponsored by the U.S. Additionally, the NGA-East database includes Fourier amplitude spectral (FAS) of the processed ground motions.
#SEISMOSIGNAL MANUAL SERIES#
The database includes time series and pseudo-spectral acceleration (PSA) for the 5%-damped elastic oscillators with periods ranging from 0.01 to 10 sec. The database contains over 29,000 records from 81 earthquake events and 1379 recording stations.
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The NGA-East database includes the two- and three-component ground-motion recordings from numerous selected events (M > 2.5, distances up to 1500 km) recorded in the Central and Eastern North America (CENA) region since 1988. It was developed as part of a large multi-disciplinary research project coordinated by PEER. The NGA-East database constitutes the largest database of processed recorded ground motions in Stable Continental Regions (SRCs).