PEER Ground Motion Database
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 database has one of the most comprehensive sets of metadata, including different distance measures, various site characterizations, and earthquake source data.
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 is now cited as a primary source of ground motion records in the latest revision of the Building Seismic Safety Councilís NEHRP Recommended Provisions.
2010 PEER Ground Motion Database - BETA Version
The latest version of the PEER Ground Motion Database contains 3182 three-component recordings of 104 shallow crustal earthquakes compiled from over 1000 stations.
The 2010 PEER Ground Motion Database Beta Version was developed in the fall of 2010 to improve the usefulness of the database for engineers. A new interactive web-based application was released that allows engineers to search, select, download, and scale records to match a target response spectrum based on the userís specific requirements and search criteria. The target response spectrum can be chosen to comply with the ASCE-05 provisions, to conform to the NGA 2008 models, or to match a user-defined spectrum.
Additionally, all ground motion records in the database were rotated to the fault-normal and fault-parallel directions. Records with velocity pulses were also flagged and made searchable in the web application.
In 2011 the database will be updated with additional records and metadata that will more than double the number of records.
Previous PEER Ground Motion Databases
For many years, PEER has spent considerable effort in collecting and organizing ground motion databases to assure data processing consistency and accurate metadata retrieval. Previous versions were released in 2005 and 2000. These old database versions are still accessible from the links below for archival purposes.
2005 PEER Ground Motion Database
The 2005 PEER Ground Motion Database was used for the development of the 2008 NGA West Models. The NGA West Program developed new ground motion prediction equations for the western United States that were released in 2008. The 2005 database was expanded in 2007 to incorporate recent Italian earthquake records and related metadata. This addition represented an important improvement in order to account for regions with shallow seismicity with prevalent normal faulting.
2000 PEER Ground Motion Database
The 2000 PEER Ground Motion Database was the first PEER database to make all the information available to the public. The number of records is significantly smaller than the 2005 database.
Why Did PEER Develop the Database?
Modern approaches to assessing seismic performance of infrastructure rely on good information about likely ground shaking at a site. 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.
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. The first step was to collect the most important ground motion records worldwide. The second step was to ensure that all the data had been processed consistently and reliably. 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. Finally, PEER created the online database to make all the information available to the public. 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.