NGA-Subduction research program

Yousef Bozorgnia; Norman A. Abrahamson; Sean Kamran Ahdi; Timothy D. Ancheta; Linda Al Atik; Ralph J Archuleta; Gail M. Atkinson; David M Boore; Kenneth W. Campbell; Brian S-J Chiou; Victor Contreras; Robert B. Darragh; Sahar Derakhshan; Jennifer L Donahue; Nick Gregor; Zeynep Gulerce; Izzat M Idriss; Chengxin Jiang; Tadahiro Kishida; Albert R. Kottke; Nicolas Kuehn; Dongyoup Kwak; Annie O-L Kwok; Person Lin; Jorge Macedo; Silvia Mazzoni; Saburoh Midorikawa; Sifat Muin; Grace Alexandra Parker; Sanaz Rezaeian; Hongjun Si; Walter J Silva; Jonathan P. Stewart; Melanie Walling; Katie Wooddell; Robert R Youngs

doi:10.1177/87552930211056081

NGA-Subduction research program

Earthquake Spectra

By: Yousef Bozorgnia, Norman A. Abrahamson, Sean Kamran Ahdi, Timothy D. Ancheta, Linda Al Atik, Ralph J Archuleta, Gail M. Atkinson, David M Boore, Kenneth W. Campbell, Brian S-J Chiou, Victor Contreras, Robert B. Darragh, Sahar Derakhshan, Jennifer L Donahue, Nick Gregor, Zeynep Gulerce, Izzat M Idriss, Chengxin Jiang, Tadahiro Kishida, Albert R. Kottke, Nicolas Kuehn, Dongyoup Kwak, Annie O-L Kwok, Person Lin, Jorge Macedo, Silvia Mazzoni, Saburoh Midorikawa, Sifat Muin, Grace Alexandra Parker, Sanaz Rezaeian, Hongjun Si, Walter J Silva, Jonathan P. Stewart, Melanie Walling, Katie Wooddell, and Robert R Youngs

https://doi.org/10.1177/87552930211056081

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Abstract

This article summarizes the Next Generation Attenuation (NGA) Subduction (NGA-Sub) project, a major research program to develop a database and ground motion models (GMMs) for subduction regions. A comprehensive database of subduction earthquakes recorded worldwide was developed. The database includes a total of 214,020 individual records from 1,880 subduction events, which is by far the largest database of all the NGA programs. As part of the NGA-Sub program, four GMMs were developed. Three of them are global subduction GMMs with adjustment factors for up to seven worldwide regions: Alaska, Cascadia, Central America and Mexico, Japan, New Zealand, South America, and Taiwan. The fourth GMM is a new Japan-specific model. The GMMs provide median predictions, and the associated aleatory variability, of RotD50 horizontal components of peak ground acceleration, peak ground velocity, and 5%-damped pseudo-spectral acceleration (PSA) at oscillator periods ranging from 0.01 to 10 s. Three GMMs also quantified “within-model” epistemic uncertainty of the median prediction, which is important in regions with sparse ground motion data, such as Cascadia. In addition, a damping scaling model was developed to scale the predicted 5%-damped PSA of horizontal components to other damping ratios ranging from 0.5% to 30%. The NGA-Sub flatfile, which was used for the development of the NGA-Sub GMMs, and the NGA-Sub GMMs coded on various software platforms, have been posted for public use.

Additional publication details
Publication type	Article
Publication Subtype	Journal Article
Title	NGA-Subduction research program
Series title	Earthquake Spectra
DOI	10.1177/87552930211056081
Volume	38
Issue	2
Year Published	2021
Language	English
Publisher	Sage Publications
Contributing office(s)	Geologic Hazards Science Center
Description	16 p.
First page	783
Last page	798
Google Analytic Metrics	Metrics page