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
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The May 2026 issue of Earthquake Spectra is now available online!
The Editor’s Choice paper is “Exposure Model of Urban Residential Buildings for Seismic Risk Assessment of Prioritized Municipalities in Colombia” by Juan C. Reyes, Miguel Mora, Ana B. Acevedo, Albert R. Ortiz, Carlos A. Arteta, Jairo Valcarcel, Hector Perez, Nathalia Ceron, Alejandra Clavijo, Katerine Arias, and Juan A. Ospina.
FIGURE 1: Summary of the methodology implemented for developing the
exposure models at the block level for the MNRS.
Reyes et al. present a residential building exposure model developed for 83 prioritized municipalities in Colombia as part of the National Seismic Risk Model (MNRS), a multi-year collaboration coordinated by the Colombian Geological Survey involving 13 universities and more than 150 contributors. The model provides block-level data on building location, structural typology, occupancy, and replacement cost, covering approximately 3.9 million buildings and 26 million residents—roughly half the national population. The methodology integrates cadastral records, the 2018 National Population and Housing Census, and more than 324,000 visual inspections conducted through a Street View–based tool, with stratified random sampling applied within homogeneous zones to ensure representative typology distributions. A taxonomy specific to Colombian construction practices is paired with regionally adjusted replacement costs that account for material prices, freight, and socioeconomic strata. The results highlight the dominance of masonry construction, which accounts for 61–87% of buildings across municipalities, with unreinforced clay masonry the single most prevalent typology—a finding with direct implications for retrofit prioritization and risk reduction policy.
The exposure data are publicly available through DesignSafe, supporting reproducibility and adaptation by other research groups. The paper is part of Earthquake Spectra’s in-development National Seismic Risk Model of Colombia Special Collection, and offers a transferable framework for other countries developing national-scale exposure inventories.
RESEARCH PAPERS
Christopher A. de la Torre, Misko Cubrinovski, Brendon A. Bradley, Sanjay S. Bora
Kishor S. Jaiswal, N. Simon Kwong
Component-to-component variability of response spectral ordinates from strike-slip earthquakes
Nathan Girmay, Eduardo Miranda
Viviana Vela, Farid Ghahari, Monica D. Kohler, German A. Prieto, Ertugrul Taciroglu
Shana Scogin, Sagar Khanal, Saphal Joshi, Rachael Lau
Huy G. Pham, Tracy C. Becker
Rapid city-scale earthquake assessment by combining numerical simulation and sparse sensing
Dongyang Tang, Hidekazu Usami, Saneiki Fujita, Reika Nomura, Kenjiro Terada, Susumu Ohno, Jia Guo, Masaaki Sakuraba, Kazuya Nojima, Shuji Moriguchi
Ali Fallah Yeznabad, Karen Assatourians, Hesham El Naggar, Sheri Molnar
Ezgi Orhan, Anne M. Wein, Cynthia A. Kroll
Kiranjot Kaur, Carlos Molina Hutt, Amy M. Kim
Kyle B Withers, Morgan P Moschetti, Brad T Aagaard, Peter M Powers, Jason Altekruse, Sanaz Rezaeian
Alexander R. Hartloper, Konstantinos Bakalis, Satoshi Yamada, Dimitrios G. Lignos
Brad T. Aagaard, Morgan P. Moschetti, Kyle B. Withers
Morgan P. Moschetti, Brad T. Aagaard, Kyle B. Withers, Kevin Milner, Jason Altekruse, Julie Herrick, Peter M. Powers, Sanaz Rezaeian, Allison M. Shumway, William Stephenson
A Performance-Based Earthquake Fatality Modeling Framework Using Collapse Volume Ratios
Luis Ceferino, Yinchen Yi, Wenxiao Li, Yvonne Merino, Luis Moya, Kimberley Shoaf, Emily So
Effective Seismic Retrofit of URM Parapets Using Mechanical Anchors as Vertical Reinforcement
Jerry Y. Zhai, Francisco Galvez, Eyitayo A. Opabola, Dmytro Dizhur, Robert Hudson, David Sommer
Jinyan Zhao, Neetesh Sharma, Jack W. Baker
A comparison of ground motion intensity measures for estimating collapse
Liam Pledger, Saiteja Sistla, Santiago Pujol, Reagan Chandramohan
Kianoush Rostami, Julia S. Becker, Raj Prasanna, Lauren J. Vinnell
Allison M. Shumway, Kevin R. Milner, Peter M. Powers, Morgan P. Moschetti, Jason M. Altekruse, Julie A. Herrick, Andrea L. Llenos, Kyle B. Withers, Edward H. Field, Brad T. Aagaard, Richard W. Briggs, Alexandra E. Hatem, Kirstie L. Haynie, Andrew J. Michael, Jessica A. Thompson Jobe, Kishor S. Jaiswal, Brandon S. Clayton, Nicolas Luco, Mark D. Petersen, Sanaz Rezaeian, Thomas L. Pratt, Yuehua Zeng
Chiara Smerzini, Vincenzo Manfredi
Chang He, Bolun Liu, Wang Zhu, Zhipeng Lai, Jian Yu, Lizhong Jiang
An experimental study of a spherical sliding isolation system subjected to pulse-like ground motions
Ya-Heng Yang, Yin-Nan Huang, Yu-Chen Lin, Chang-Ching Chang
Collapse Safety Of Reinforced Concrete Frames Under Building-Code Evolution
Carlos A. Arteta, Veronica J. Abuchar, Tayrin Hurtado
Seismic Reliability Assessment of Direct and Modal Methods: Application to Sarıyar Dam
Ahmad Yamin Rasa, Yooseob Song, Abdul Ghafar Wahab
Seismic Performance of Precast Brick-Engineered Cementitious Composite Panels in Confined Masonry
Subodh Kumar, Rajat Avasthi, Durgesh C. Rai
Juan C. Reyes, Miguel Mora, Ana B. Acevedo, Albert R. Ortiz, Carlos A. Arteta, Jairo Valcarcel, Hector Perez, Nathalia Ceron, Alejandra Clavijo, Katerine Arias, Juan A. Ospina
Spatial cross-correlation models for next-generation amplitude and cumulative intensity measures
Vitor A. Monteiro, Savvinos Aristeidou, Gerard J. O’Reilly
Roberto Paolucci, Chiara Smerzini, Manuela Vanini, Ilario Mazzieri, Victor M. Hernández-Aguirre, Luigi Vadacca
DATA PAPERS
OpenAmp: An Open-Source Site Amplification Database to Unlock the Potential of Machine Learning
Chuanbin Zhu, Dong-youp Kwak, Marco Pilz, Annabel Haendel, Junju Xie, Hiroshi Kawase, Fabrice Cotton
Nikolaos Stathas, Andrea Bartolotti, Nicolò Damiani, Stathis Bousias, Francesco Smiroldo, Albino Angeli, Dmytro Dizhur, Francesco Graziotti, Ivan Giongo
EARTHQUAKE ENGINEERING PRACTICE PAPERS
Ricardo Bonett, Frank Vidales, Orlando Arroyo, Juan Jose Ocampo, Dirsa Feliciano, Julián Carrillo
Orlando Arroyo, Ricardo Bonett, Luis F. Caballero-Castro
