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About the NGA Database

The PEER NGA database is an update and extension to the PEER Strong Motion Database, first published on this web site in 1999. The NGA database includes a larger set of records, more extensive meta-data, and some corrections to information in the original database. At this time, the NGA site contains only acceleration time history files. (The original site includes velocity, displacement, and response spectra.) See the PEER Lifelines program for more information on the NGA project.

Disclaimer

The NGA strong-motion database and the associated flatfile are still under review, and the documentation is still being developed. They represent a work in progress that is subject to future revisions as a result of the review process and as new information is obtained, or revised interpretations made. They are released in their current version to obtain feedback and comments from the earthquake engineering, seismology, and geology communities worldwide.

The Pacific Earthquake Engineering Research Center, University of California at Berkeley, funding and sponsoring agencies for the NGA project, and all organizations and individuals who contributed to the compilation, processing, and review of the database and flatfile are not responsible for any inaccuracy or incompleteness of the data, records, and parameters. The user of the database and flatfile assumes the entire responsibility of using them.

Feedback and Comments

Comments and feedback on any aspect of the NGA database and flatfile are greatly appreciated. Please send your comments to: Brian_Chiou@dot.ca.gov and peer_center@berkeley.edu.

Acknowledgements

Funded by Caltrans, PG&E, and the California Energy Commission through the PEER Lifelines Program, and the National Science Foundation, with partnership between PEER, USGS, and SCEC.

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Several organizations provided funding for developing the NGA project database, and many organizations and individuals contributed to its development and review. These organizations and individuals will be acknowledged in the documentation.

Copyright Notice

The NGA Database and associated works ("Works") are Copyright © 2005, The Regents of the University of California (Regents). All Rights Reserved.

IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA, THE PACIFIC EARTHQUAKE ENGINEERING RESEARCH CENTER, OR ITS SUB-AWARDEES BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THE WORKS, EVEN IF THE UNIVERSITY OF CALIFORNIA, THE PACIFIC EARTHQUAKE ENGINEERING RESEARCH CENTER, OR SUB-AWARDEES HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

THE UNIVERSITY OF CALIFORNIA, THE PACIFIC EARTHQUAKE ENGINEERING RESEARCH CENTER, AND SUB-AWARDEES SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE UNIVERSITY OF CALIFORNIA, THE PACIFIC EARTHQUAKE ENGINEERING RESEARCH CENTER, SUB-AWARDEES DO NOT REPRESENT OR WARRANT THAT THE WORKS DO NOT INFRINGE THE INTELLECTUAL PROPERTY, PROPRIETARY, OR CONTRACTUAL RIGHTS OF THIRD PARTIES. THE WORKS PROVIDED HEREUNDER ARE PROVIDED ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA, THE PACIFIC EARTHQUAKE ENGINEERING RESEARCH CENTER, AND SUB-AWARDEES HAVE NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.