Nga-subduction research program

Yousef Bozorgnia, Tadahiro Kishida, Norman A. Abrahamson, Sean K. Ahdi, Timothy D. Ancheta, Ralph J. Archuleta, Gail Atkinson, David M. Boore, Kenneth W. Campbell, Brian Chiou, Victor Contreras, Robert Darragh, Nick Gregor, Zeynep Gulerce, I. M. Idriss, Chen Ji, Ronnie Kamai, Nicolas Kuehn, Dong Youp Kwak, Annie KwokPo Shen Lin, Harold Magistrale, Silvia Mazzoni, Sifat Muin, Saburoh Midorikawa, Grace Parker, Hongjun Si, Walter J. Silva, Jonathan P. Stewart, Melanie Walling, Katie E. Wooddell, Robert R. Youngs

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


This paper provides an overview of NGA-Sub, a large multidisciplinary community-based research initiative to develop a comprehensive ground-motion database and multiple ground-motion models (GMMs) for subduction events. In the NGA-Sub project, we developed a database of ground motions recorded in worldwide subduction events. The database includes the processed recordings and supporting source, path, and site metadata from Japan, Taiwan, the US Pacific Northwest, Alaska, Latin America (including Mexico, Peru and Chile), and New Zealand. The NGASub database includes 1,570 events with moment magnitudes ranging from 4.0 to 9.1. The subduction events are classified as interface, intraslab, or outer-rise events. The NGA-Sub ground-motion database has over 214,000 individual ground-motion components. This is by far the largest ground-motion database that we have ever developed in any NGA project. Pseudo-spectral acceleration as well as Fourier amplitude spectra for frequencies from 0.1 to 100 Hz have been included in the database. Multiple GMMs are developed using the empirical ground-motion database and the supporting ground-motion simulations. The scope of the NGA-Sub GMMs is to develop models for horizontal components of ground motion for 5% damped pseudo-acceleration response spectra for period range of 0.01 to 10 sec. Following the tradition of previous NGA projects, the GMM modeling teams as well as database developers have had continuous technical interactions which resulted in a higher quality of the final products than each researcher or oneteam group could achieve individually. An overview of the NGA-Sub project is presented in this paper.,.

Original languageEnglish
Title of host publication11th National Conference on Earthquake Engineering 2018, NCEE 2018
Subtitle of host publicationIntegrating Science, Engineering, and Policy
PublisherEarthquake Engineering Research Institute
Number of pages4
ISBN (Electronic)9781510873254
StatePublished - 1 Jan 2018
Event11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018 - Los Angeles, United States
Duration: 25 Jun 201829 Jun 2018

Publication series

Name11th National Conference on Earthquake Engineering 2018, NCEE 2018: Integrating Science, Engineering, and Policy


Conference11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018
Country/TerritoryUnited States
CityLos Angeles

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology


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