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A key benefit of the EERI membership is full electronic access to Earthquake Spectra—the publication of record for the development of earthquake engineering practice, earthquake codes and regulations, earthquake public policy, and earthquake investigation reports. Once you are logged in to my.eeri.org with your EERI member credentials, clicking on these links will take you directly to each paper. Feedback or questions? Contact
The February 2026 issue of Earthquake Spectra is now available online!
The Editor’s Choice paper is “An Extended and Updated Strong Ground-Motion Database for the Chilean Subduction Earthquakes” by Nicolás Bastías, Gonzalo Montalva, Felipe Leyton, Pablo Heresi, Horacio Domínguez.
FIGURE 6: Distribution of events by tectonic type (upper panel) and
cross-sectional views at three selected latitudes (lower panel).
This Data Paper presents an updated strong ground-motion database for the Chilean subduction zone, expanding substantially on the prior compilation by Bastías and Montalva (2016). The database contains 43,050 records from 6,679 earthquakes with moment magnitudes from 4.0 to 8.8, recorded at 530 stations between 1985 and 2024. Events are classified into interface, inslab, shallow crustal, and outerrise categories based on hypocentral depth, focal mechanism, and location relative to the subduction trench. Site characterization is provided for all stations; Vs30 is measured directly at 223 stations and estimated elsewhere using a weighted combination of three proxy methods: topographic slope, horizontal-to-vertical spectral ratios, and P-wave seismogram ratios. The flatfile includes PGA, PGV, CAV, Arias intensity, significant duration, and 5%-damped pseudospectral acceleration at 27 periods, with orientation-independent RotD00, RotD50, and RotD100 horizontal spectra. Processed and unprocessed three-component acceleration, velocity, and displacement time series for each record are provided in HDF5 format along with a Jupyter notebook for data access. The database is publicly accessible via DesignSafe at https://doi.org/10.17603/ds2-6gyp-t353.
RESEARCH PAPERS
Tomoki Hikita, Yusuke Tomozawa
Ya-Heng Yang, Tracy C. Becker, Maria Camila Lopez Ruiz, Michael Yust, Tessa Williams, Debra Murphy
Orlando Arroyo, Carlos Angarita, Carlos Montes, Ricardo Bonett, Julian Carrillo
Jiadaren Liu, Ersilia Giordano, Daniele Malomo
Regional Site Response Model via Uncertainty Projected Mapping: Application to Kanto Region, Japan
Anirban Chakraborty, Sreeram Reddy Kotha
Assessing the Loss of Building Functionality Post-Earthquake Using Machine Learning
Lianyan Li, Alice Chang-Richards, Megan Boston, Ken Elwood
Nikola Blagojević, Nemanja Krtinić, Safak Arslantürkoglu, Serife Özata, Zeynep Ünsal Aslan, Marko Marinković, Svetlana Brzev, Božidar Stojadinović
Limiting Safety-Critical Structural Damage in Recovery-Based Seismic Design Provisions
Kristen Blowes, Carlos Molina Hutt, Reid B. Zimmerman, Dustin T. Cook, Ed Almeter, Curt Haselton
Maximum Usable Period of Ground Motion Records for Engineering Applications
Alessandro Damiani, Enes Veliu, Mohsen Kohrangi, Maria Lancieri, Stefano Parolai, Paolo Bazzurro
Next-Generation Probabilistic Liquefaction Model Building at the Regional Scale
Jonathan Schmidt, Shideh Dashti, Cristina Torres-Machi
Mohsen Akhani, Mehran Davatgari-Tafreshi, Shahram Pezeshk
Ali Güney Özcebe, Francesca Bozzoni, Carlo Giovanni Lai, Elisa Zuccolo
Birendra Nath Singha, Goutam Mondal
Felipe Kuncar, Brendon A. Bradley, Christopher A. de la Torre
Evaluating the Seismic Damage Dynamics of Buildings’ Vertical Growth in Lima, Peru
Briggite Espinoza, Luis Moya, Luis Ceferino
Site Response Models Based on Geometric Parameters for Southern California Sedimentary Basins
Rashid Shams, Chukwuebuka C. Nweke, Grace A. Parker
Incorporating Ground Motion Directionality into Probabilistic Seismic Hazard Analysis
Alan Poulos, Eduardo Miranda
Md. Najmul Mowla, Davood Asadi, Ferdous Sohel
Mehrdad Aftabiazar, Patrick Paultre
Eduardo Marques Vieira Pereira, Marcelo Sousa de Assumpção, Katsuichiro Goda, Gustavo Henrique Siqueira
Nonlinear Modeling of Rectangular Reinforced Concrete Columns Jacketed Using FRP Materials
Wassim M. Ghannoum, Sergio Breña, Insung Kim, Jazalyn Dukes, Siamak Sattar
Nonstructural Design Requirements for Functional Recovery Performance
Kristen Blowes, Carlos Molina Hutt, Reid B. Zimmerman, Dustin T. Cook, Ed Almeter, Curt Haselton
Experimental Evaluation of Prototype Seismic Retrofits for Precast Concrete Hollow-Core Floors
Frank Büker, Lucas S. Hogan, Kenneth J. Elwood, Des K. Bull, Nicholas J. Brooke
Operationalizing Equity: How Disaggregated Risk Metrics Support Equity in Emergency Management
Marísa Macías, Elizabeth Reddy, Elijah Knodel, Sean McGowan, Sabine Loos
Ground-Motion Aleatory-Variability Models for Puerto Rico and the U.S. Virgin Islands
Morgan P. Moschetti
Observed Ground Motions That Exceeded Design Response Spectra in the Western United States
Victor H. Calderon, Jack W. Baker
Aydin Hassanzadeh, Saber Moradi
Notes on Spatial Correlation for Average Spectral Acceleration: Direct and Indirect Approaches
Vitor A. Monteiro, Gerard J. O’Reilly
Sanjay Singh Bora
Damage in Rio Dell From 2022 Ferndale M6.4 Earthquake
Bruce Maison, John Eidinger
Anastasios G. Sextos, Ziliang Zhang, Nicholas A. Alexander
Beyond Deaths and Dollars: Modeling Requirements to Support Equity-Focused Disaster Risk Management
Sabine Loos, Marísa Macías, Madeline Karr, Lori Peek
Utilization of Spatially Distributed mHVSR to Assess the Effectiveness of Ground Response Analysis
Francisco Javier G. Ornelas, Christopher A. de la Torre, Jonathan P. Stewart
Impact of Seismic Wave Types on the Response of Near-Fault Valley-Spanning Bridges
Chao Luo, Jingjing Li, Zhipeng Zhao, Hao Wang
DATA PAPERS
Database and Geometrical Characterization of 3D Stone Masonry Wall Microstructures
Mati Ullah Shah, Savvas Saloustros, Qianqing Wang, Mahmoud Shaqfa, Javier Ortega, Katrin Beyer
Medhat Elmorsy, Liam Jones, Manuel Wild, Antonios Katsamakas, Konstantinos Tatsis, Ioannis Anastasopoulos, Michalis Vassiliou
An Extended and Updated Strong Ground-Motion Database for the Chilean Subduction Earthquakes
Nicolás Bastías, Gonzalo Montalva, Felipe Leyton, Pablo Heresi, Horacio Domínguez
Zarin Karim Zadeh, Vitor Silva, Catalina Yepes-Estrada, Martina Caruso, Emily So, David Wald, Kishor Jaiswal, Kristin Marano
EARTHQUAKE ENGINEERING PRACTICE PAPERS
John Ardila-Gonzalez, Luis Fargier-Gabaldon, Matías A. Hube, Yahya Kurama
Host-To-Target Site Response Adjustments for Site-Specific Probabilistic Seismic Hazard Analysis
Albert R. Kottke, James Kaklamanos, Adrian Rodriguez-Marek, Robert R. Youngs, Julian J. Bommer, Linda Al Atik, David M. Boore, Suzette J. Payne, Blaine M. Bockholt, Glenn Russell
Dong Youp Kwak, Jae-Kwang Ahn
BOOK REVIEWS
Rachel A. Davidson
Orlando Arroyo
OPINIONS
Brendon A. Bradley
