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Journal Article

Alternative Hybrid Empirical Ground‐Motion Model for Central and Eastern North America Using Hybrid Simulations and NGA‐West2 Models

Alireza Shahjouei, Shahram Pezeshk
Published: 15 March 2016
Bulletin of the Seismological Society of America (2016) 106 (2): 734–754.
DOI: https://doi.org/10.1785/0120140367
...) epistemic uncertainty associated with applying different empirical GMM s for the host region (i.e., NGA‐West2 GMM s) and (2) epistemic uncertainty originating from using different parameters in the synthetic simulation framework in both the host and target regions. The crustal structure models used...
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Epistemic Uncertainty for NGA-West2 Models

Linda Al Atik, Robert R. Youngs, M. EERI
Published: 01 August 2014
Earthquake Spectra (2014) 30 (3): 1301–1318.
DOI: https://doi.org/10.1193/062813EQS173M
... to be added to the NGA-West2 GMPE set. We first evaluate the model-to-model differences in the median predictions of the five models: Abrahamson et al. (2014 ; ASK14), Boore et al. (2014 ; BSSA14), Campbell and Bozorgnia (2014 ; CB14), Chiou and Youngs (2014 ; CY14), and Idriss (2014 ; Id14...
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NGA-West2 Models for Ground Motion Directionality

Shrey K. Shahi, Jack W. Baker, M. EERI
Published: 01 August 2014
Earthquake Spectra (2014) 30 (3): 1285–1300.
DOI: https://doi.org/10.1193/040913EQS097M
...Shrey K. Shahi; Jack W. Baker, M. EERI The NGA-West2 research program, coordinated by the Pacific Earthquake Engineering Research Center (PEER), is a major effort to produce refined models for predicting ground motion response spectra. This study presents new models for ground motion directionality...
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NGA-West2 Ground Motion Model for the Average Horizontal Components of PGA, PGV, and 5% Damped Linear Acceleration Response Spectra

Kenneth W. Campbell, M. EERI, Yousef Bozorgnia, M. EERI
Published: 01 August 2014
Earthquake Spectra (2014) 30 (3): 1087–1115.
DOI: https://doi.org/10.1193/062913EQS175M
... NGA-West1) ground motion model ( Campbell and Bozorgnia 2007 , 2008 ) for peak ground acceleration (PGA), peak ground velocity (PGV), and 5% damped linear pseudo-absolute acceleration response spectral ordinates (PSA). Our 2014 NGA-West2 and 2008 GMPEs are referred to as CB14 and CB08, respectively...
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On‐Site Earthquake Early Warning Model for Selected Records in the NGA‐West2 Dataset Using S ‐ and P ‐Wave Spectral Ratios

Cen Zhao, John X. Zhao
Published: 07 May 2024
Bulletin of the Seismological Society of America (2024)
DOI: https://doi.org/10.1785/0120220257
... to as the R3P model. The modeling presented here was based on strong‐motion records from the Next Generation Attenuation (NGA)‐West2 dataset. We also used the spectral ratio R FP between the response spectral values from the full records from the S ‐wave arrival time to the end of the record...
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Includes: Supplemental Content
Journal Article

Vertical Ground Motion Model for PGA, PGV, and Linear Response Spectra Using the NGA-West2 Database

Yousef Bozorgnia, M. EERI, Kenneth W. Campbell, M. EERI
Published: 01 May 2016
Earthquake Spectra (2016) 32 (2): 979–1004.
DOI: https://doi.org/10.1193/072814eqs121m
...Yousef Bozorgnia, M. EERI; Kenneth W. Campbell, M. EERI We summarize the development of the NGA-West2 Bozorgnia-Campbell empirical ground motion model (GMM) for the vertical components of peak ground acceleration (PGA), peak ground velocity (PGV), and 5%-damped elastic pseudo-absolute acceleration...
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Applicability of the NGA‐West2 Site‐Effects Model for Central and Eastern North America

Behzad Hassani, Gail M. Atkinson
Published: 05 April 2016
Bulletin of the Seismological Society of America (2016) 106 (3): 1331–1341.
DOI: https://doi.org/10.1785/0120150321
...Behzad Hassani; Gail M. Atkinson Abstract We examine the applicability of the Next Generation Attenuation‐West2 (NGA‐West2) site‐effects model ( Seyhan and Stewart, 2014 ), which is a V S 30 ‐based (time‐averaged shear‐wave velocity in the upper 30 m) model, to sites in central and eastern North...
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An NGA-West2 Empirical Model for Estimating the Horizontal Spectral Values Generated by Shallow Crustal Earthquakes

I. M. Idriss, Hon.M.EERI
Published: 01 August 2014
Earthquake Spectra (2014) 30 (3): 1155–1177.
DOI: https://doi.org/10.1193/070613EQS195M
... Attenuation (NGA) project. A significant number of additional recordings were collected over the past three years, and the 2008 model has been revised using the new data and is presented in this paper. The model was again selected to be simple, and the model parameters were estimated using the expanded...
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NGA-West2 Empirical Fourier and Duration Models to Generate Adjustable Response Spectra

Sanjay Singh Bora, Fabrice Cotton, Frank Scherbaum
Published: 01 February 2019
Earthquake Spectra (2019) 35 (1): 61–93.
DOI: https://doi.org/10.1193/110317EQS228M
... tectonic regions. We use a subset of NGA-West2 database with M 3.2–7.9 earthquakes at distances 0–300 km. The NGA-West2 database expanded over a wide magnitude and distance range facilitates a better constraint over derived models. A frequency-dependent duration model is derived to obtain adjustable...
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Comparison of Near‐Fault Velocity Pulse‐Like Ground Motions from the 2018 M w 6.4 Hualien, Taiwan, Earthquake with the Next Generation Attenuation (NGA)‐West2 Ground‐Motion Models and Directivity Models

Xiaofen Zhao, Zengping Wen, Junju Xie, Quancai Xie, Kuo‐En Ching
Published: 12 January 2021
Bulletin of the Seismological Society of America (2021) 111 (2): 686–703.
DOI: https://doi.org/10.1785/0120200141
... ground‐motion models used to quantify the hazard posed by pulse‐like ground motions may underestimate them, but they are relatively suitable for describing the residual ground motions after extracting pulses. Nevertheless, the applicability of Next Generation Attenuation‐West2 Project (NGA‐West2) models...
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Comparison between the GMM developed in this study and four <span class="search-highlight">NGA</span>‐<span class="search-highlight">West2</span> <span class="search-highlight">model</span>...

Comparison between the GMM developed in this study and four NGA‐West2 model...

Published: 07 August 2018
Figure 8. Comparison between the GMM developed in this study and four NGA‐West2 models. The rupture is placed on a reverse fault with a dip of 45°, rupturing to the surface. Length and width are from M with the Wells and Coppersmith (1994) equations. The epicenter is placed in the center
Journal Article

Comparison of Strong Ground Motion Recordings of the Lushan, China, Earthquake of 20 April 2013 with the Next Generation Attenuation (NGA)‐West2 Ground‐Motion Models

Yuzhu Bai
Published: 06 June 2017
Bulletin of the Seismological Society of America (2017) 107 (4): 1724–1736.
DOI: https://doi.org/10.1785/0120160116
... is acceptable. The spatial contours of intraevent residuals for PGA predicted by the five NGA‐West2 models are almost the same, all showing four regions of negative intraevent residuals. Three of these regions are mainly distributed with the source‐to‐site azimuth approximating to 90° or − 90 ° and the other...
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A Real‐Time and Data‐Driven Ground‐Motion Prediction Framework for Earthquake Early Warning

Avigyan Chatterjee, Nadine Igonin, Daniel T. Trugman
Published: 20 December 2022
Bulletin of the Seismological Society of America (2023) 113 (2): 676–689.
DOI: https://doi.org/10.1785/0120220180
... first compare the observed ground motions to predictions from existing ground‐motion models, namely the modified Boore and Atkinson (2008) and active crustal Next Generation Attenuation (NGA)‐West2 ground‐motion prediction equations, before implementing a new Bayesian model optimized for a real‐time...
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Journal Article

Ground motion prediction equation for crustal earthquakes in Taiwan

Van-Bang Phung, Chin Hsiung Loh, Shu Hsien Chao, Brian SJ Chiou, Bor-Shouh Huang
Published: 01 November 2020
Earthquake Spectra (2020) 36 (4): 2129–2164.
DOI: https://doi.org/10.1177/8755293020919415
... not available or were previously incomplete. In this study, we compare the proposed model with the NGA-West2 models and discuss the regional difference in ground motion in terms of spectral shape, magnitude scaling, distance scaling, depth scaling, style of faulting, and site effects. We provide median...
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Fixed coefficients in <span class="search-highlight">NGA</span>-<span class="search-highlight">West2</span> <span class="search-highlight">models</span> <span class="search-highlight">Model</span> Fixed coefficients...

Fixed coefficients in NGA-West2 models Model Fixed coefficients...

Published: 01 August 2014
Table 1 Fixed coefficients in NGA-West2 models Model Fixed coefficients ASK14 V lin , b, n, c, M 1 , M 2 BSSA14 M h ,M ref ,R ref ,V ref ,V c ,e 0 CB14 k 1 , k 2 , k 3 , n, c, a 2 , h 1 , h 2 , h 3 , h 4 , h 5 , h 6
Journal Article

Comparison of NGA-West2 Directivity Models

Paul Spudich, Badie Rowshandel, Shrey K. Shahi, Jack W. Baker, M. EERI, Brian S.-J. Chiou
Published: 01 August 2014
Earthquake Spectra (2014) 30 (3): 1199–1221.
DOI: https://doi.org/10.1193/080313EQS222M
...Paul Spudich; Badie Rowshandel; Shrey K. Shahi; Jack W. Baker, M. EERI; Brian S.-J. Chiou Five directivity models have been developed based on data from the NGA-West2 database and based on numerical simulations of large strike-slip and reverse-slip earthquakes. All models avoid the use...
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Simulation of near-fault ground motions for randomized directivity parameters

Yara Daoud, Mayssa Dabaghi, Armen Der Kiureghian
Published: 01 February 2022
Earthquake Spectra (2022) 38 (1): 432–455.
DOI: https://doi.org/10.1177/87552930211030941
... conditions are accounted for by randomizing the rupture geometry and hypocenter location. For this purpose, new predictive models of the rupture geometry parameters are developed for shallow crustal earthquakes with magnitudes between 5.2 and 7.9. To allow validation of synthetic motions with NGA-West2...
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PSV spectra after scaling to PGA = 0.25 g for four <span class="search-highlight">NGA</span>-<span class="search-highlight">West2</span> <span class="search-highlight">models</span> as co...

PSV spectra after scaling to PGA = 0.25 g for four NGA-West2 models as co...

Published: 01 August 2015
Figure 3. PSV spectra after scaling to PGA = 0.25 g for four NGA-West2 models as compared to NGA-West2 data selected according to the following criteria: M = 6.6–7.0, R RUP < 20 km, V S 30 = 600–900 m/s, and all fault types. Data are represented by the geometric mean of 25 data
Journal Article

An Evaluation of the Applicability of NGA‐West2 Ground‐Motion Models for Japan and New Zealand

Sum Mak, Fabrice Cotton, Matthew Gerstenberger, Danijel Schorlemmer
Published: 30 January 2018
Bulletin of the Seismological Society of America (2018) 108 (2): 836–856.
DOI: https://doi.org/10.1785/0120170146
... Attenuation‐West2 (NGA‐West2) project over widely adopted regional GMMs for Japan and New Zealand. The large global dataset used by NGA‐West2 GMMs allows sophisticated modeling, whereas the regional datasets used by regional GMMs may more directly represent region‐specific ground‐motion features. We measured...
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Implementation of NGA-West2 Ground Motion Models in the 2014 U.S. National Seismic Hazard Maps

Sanaz Rezaeian, Mark D. Petersen, M. EERI, Morgan P. Moschetti, Peter Powers, Stephen C. Harmsen, Arthur D. Frankel, M. EERI
Published: 01 August 2014
Earthquake Spectra (2014) 30 (3): 1319–1333.
DOI: https://doi.org/10.1193/062913EQS177M
... 30 as an input parameter to generate the 2008 maps. The models were weighted equally and additional epistemic uncertainty was added to account for the close interactions between the modelers. The models used in 2008 are listed in Table 1 . The NGA-West2 project ( Bozorgnia et al. 2014 ), also...
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