Article
Geochemistry & Geophysics
E. K. Myers, E. C. Roland, A. M. Trehu, K. Davenport
Summary: This study investigates the physical properties and structural variability of the Iquique Ridge offshore northern Chile, and finds that the ridge has a thickened crust and reduced upper crustal seismic velocities, which may have potential implications for the slip behavior at depth.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Jawad Fayaz, Sarah Azar, Mayssa Dabaghi, Farzin Zareian
Summary: The paper presents a comprehensive methodology for validating simulated ground motions by comparing recorded and simulated ground-motion waveforms and their impact on structural responses in an engineering application. Regression models are developed at different levels to guide the validation process. Discrepancies between simulations and recordings are observed, suggesting further implementation and refinement of the methodology.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2021)
Article
Green & Sustainable Science & Technology
Qiuzhe Wang, Jiang Bian, Wenting Huang, Qingrui Lu, Kai Zhao, Zhaoyan Li
Summary: This study investigates the impact of trench backfilling on the seismic response of submarine pipelines. The results show that trench backfilling can mitigate the liquefaction around the pipeline and reduce the uplift of the pipeline.
Article
Engineering, Civil
Athanasia K. Kazantzi, Christos G. Lachanas, Dimitrios Vamvatsikos
Summary: Predictive relationships are provided for the response of on-ground 2D rigid blocks undergoing rocking, which can be utilized for seismic protection and design of simple rocking systems. This study involves assessing blocks of varying dimensions under increasing intensity levels of ordinary ground motions, allowing for the determination of mean and dispersion of response for an arbitrary block of interest.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Article
Geochemistry & Geophysics
Keisuke Yoshida, Naoki Uchida, Hisahiko Kubo, Ryota Takagi, Shiqing Xu
Summary: The development of seafloor seismic observations has enabled the reliable estimation of rupture directivities from offshore earthquakes. The study found that the majority of earthquakes have directional ruptures favoring updip propagation, which may be related to deep aseismic slip and upward fluid migration along the plate interface.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Engineering, Civil
Bhaskar Panchireddi, Shivang Shekhar, Jayadipta Ghosh
Summary: This study presents a comprehensive framework for assessing the seismic vulnerability of aging highway bridges considering the joint impact of ground motion duration and corrosion deterioration. The framework is applied to a case-study bridge in a subduction earthquake zone, revealing the significant vulnerability of bridge components and system under long duration earthquake shock and corrosion deterioration.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Engineering, Civil
L. Loyola, F. Rojas, R. O. Ruiz
Summary: This paper presents a record-based stochastic ground motion model for the Chilean Subduction zone, taking into account interplate and intraslab mechanisms as well as rock soil conditions. By modulating white-noise sequence in both time and spectral domain, the model generates ground motions compatible with a local Ground Motion Predictive Equation. The study involves an intensive computational optimization process to adjust predictive relationships and match the stochastic ground motions with the GMPE.
ENGINEERING STRUCTURES
(2021)
Article
Geochemistry & Geophysics
E. Klein, B. Potin, F. Pasten-Araya, R. Tissandier, K. Azua, Z. Duputel, C. Herrera, L. Rivera, J. M. Nocquet, J. C. Baez, D. Zigone, R. Madariaga, J. P. Ampuero, S. Ruiz, C. Vigny
Summary: An earthquake sequence, including a mainshock of magnitude M-w = 6.9 followed by a M-w = 6.4 aftershock, occurred in the Atacama region of Chile in September 2020. Dynamic inversions show that the two largest earthquakes are located on the subduction interface. High rate GPS data allowed for the determination of instantaneous coseismic displacements and inference of coseismic slip models.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Heng Luo, Hongyu Zeng, Qibin Shi, Teng Wang, Mingsheng Liao, Jiashun Hu, Shengji Wei
Summary: The rupture process of intermediate-depth earthquakes has been studied by analyzing both InSAR and seismic waveform data for the 2019 M(w)8.0 Peru earthquake at 122 km depth. The results show a finite rupture model extending 200 km along strike, with unilateral rupture towards north lasting for 60 s. The analysis suggests a distinct frequency-dependent rupture mechanism.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Engineering, Civil
Dahai Zhao, Huiwei Wang, Ding Wang, Ruiguang Zhu, Jinghui Zhang
Summary: The study introduces a new method for identifying pulse-like ground motions by screening seismic ground motion energy. This method combines peak energy and wavelet packet transform to extract velocity pulses and determine the start and end times of pulses. The approach can obtain more pulse-like ground motions compared to previous calculation methods.
Article
Engineering, Geological
Yinan Zhao, Maosheng Gong, Jingyang Tan, Zhanxuan Zuo, Jia Jia
Summary: This study addresses the lack of ground-motion prediction equations (GMPEs) and corresponding spatial correlation models for subduction intraslab and interface earthquakes in Japan. By selecting appropriate ground-motion records from the K-NET and KiK-net databases, new GMPEs for the significant duration (D-S) of earthquakes in the subductions zone in Japan are developed. The rationality and reliability of the proposed prediction model are verified through residual analysis and comparison with previous models. A spatial correlation model of D-S is established based on the residual analysis. The results provide valuable insights for the development of GMPEs, regional seismic hazard analysis, and loss assessment.
BULLETIN OF EARTHQUAKE ENGINEERING
(2023)
Review
Engineering, Civil
Wei Wang, Xingxing Wang
Summary: This paper summarizes the research progress on the seismic behaviour of structures under long-duration ground motions (LDGMs). It introduces the definitions and characteristics of ground motion (GM) durations, explains the generation mechanisms and characteristics of LDGMs, and presents investigations on numerical simulation, experimental research, and theoretical analysis of structures under LDGMs. Furthermore, it discusses the ductility, energy dissipation capacity, seismic fragility, and collapse resistance capacity of structures under LDGMs in detail. The paper also introduces the seismic design methods for structures under LDGMs and summarizes the structural seismic design codes considering the effects of LDGMs. Recommendations for future research are provided, emphasizing the need for more attention to the seismic responses of structures under LDGMs and further study on the definitions and characteristics of LDGMs to improve numerical simulation, theoretical analysis, and experimental research methods. Additionally, the seismic responses, seismic fragility, and collapse resistance capacity of structures under LDGMs should be investigated. This paper provides important references for considering the effects of LDGMs in the seismic design and seismic assessment of structures.
Article
Geosciences, Multidisciplinary
Yuzhu Bai, Chong Xu
Summary: This study qualitatively investigates the correlations between the spatial distributions of landslide point density (LPD) and strong ground motions of three strong earthquakes, namely the Lushan, Wenchuan, and Jiuzhaigou earthquakes. The study also characterizes the qualitative relationship between the LPD distribution and the fault rupture process. The University of California Santa Barbara (UCSB)'s broadband ground simulation method and simplified crustal layer structures are applied to reconstruct the near-field strong ground motions and fault processes of these earthquakes.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Nitin Sharma, D. Srinagesh, G. Suresh, D. Srinivas
Summary: This study focuses on seismic activity and ground motion parameter estimation in the Himalayan region, particularly targeting two moderate earthquakes that occurred in Uttarakhand within a 10-month gap. Using stochastic modeling technique, the ground motions were simulated and compared with observed data, discussing the discrepancies between simulated and observed values, along with existing ground motion prediction equations for shallow crustal earthquakes.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Engineering, Civil
Filippos Filippitzis, Monica D. Kohler, Thomas H. Heaton, Robert W. Graves, Robert W. Clayton, Richard G. Guy, Julian J. Bunn, K. Mani Chandy
Summary: The study reveals significant ground-motion amplification in urban Los Angeles during the two largest events of the 2019 Ridgecrest earthquake sequence. Coherent spectral acceleration patterns are visible in the Los Angeles Basin for longer periods, while coherence is less for shorter periods but still observable at smaller length scales due to high spatial density of measurements. Correlations of computed response spectral accelerations with basement depth and Vs30 are stronger for longer periods. The performance of state-of-the-art methods for estimating ground motions is tested, with both methods showing reasonable match with observations but unable to reproduce details of observed amplification patterns.
EARTHQUAKE SPECTRA
(2021)
Article
Geochemistry & Geophysics
Julian J. Bommer, Bernard Dost, Benjamin Edwards, Peter J. Stafford, Jan van Elk, Dirk Doornhof, Michail Ntinalexis
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2016)
Review
Geosciences, Multidisciplinary
Julian J. Bommer, Bernard Dost, Benjamin Edwards, Pauline P. Kruiver, Michail Ntinalexis, Adrian Rodriguez-Marek, Peter J. Stafford, Jan van Elk
NETHERLANDS JOURNAL OF GEOSCIENCES-GEOLOGIE EN MIJNBOUW
(2017)
Article
Geosciences, Multidisciplinary
Jan van Elk, Dirk Doornhof, Julian J. Bommer, Stephen J. Bourne, Steve J. Oates, Rui Pinho, Helen Crowley
NETHERLANDS JOURNAL OF GEOSCIENCES-GEOLOGIE EN MIJNBOUW
(2017)
Article
Geochemistry & Geophysics
Julian J. Bommer, Helen Crowley
SEISMOLOGICAL RESEARCH LETTERS
(2017)
Article
Geochemistry & Geophysics
Rik Noorlandt, Pauline P. Kruiver, Marco P. E. de Kleine, Marios Karaoulis, Ger de Lange, Antonio Di Matteo, Julius von Ketelhodt, Elmer Ruigrok, Benjamin Edwards, Adrian Rodriguez-Marek, Julian J. Bommer, Jan van Elk, Dirk Doornhof
JOURNAL OF SEISMOLOGY
(2018)
Review
Geochemistry & Geophysics
Bernard Dost, Benjamin Edwards, Julian J. Bommer
SEISMOLOGICAL RESEARCH LETTERS
(2018)
Article
Engineering, Geological
Mahdi Bahrampouri, Adrian Rodriguez-Marek, Julian J. Bommer
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2019)
Article
Engineering, Geological
B. Edwards, B. Zurek, E. van Dedem, P. J. Stafford, S. Oates, J. van Elk, B. deMartin, J. J. Bommer
BULLETIN OF EARTHQUAKE ENGINEERING
(2019)
Article
Engineering, Geological
Peter J. Stafford, Brian D. Zurek, Michail Ntinalexis, Julian J. Bommer
BULLETIN OF EARTHQUAKE ENGINEERING
(2019)
Article
Engineering, Geological
R. A. Green, J. J. Bommer, A. Rodriguez-Marek, B. W. Maurer, P. J. Stafford, B. Edwards, P. P. Kruiver, G. de Lange, J. van Elk
BULLETIN OF EARTHQUAKE ENGINEERING
(2019)
Proceedings Paper
Engineering, Geological
Kristin J. Ulmer, Sneha Upadhyaya, Russell A. Green, Adrian Rodriguez-Marek, Peter J. Stafford, Julian J. Bommer, Jan van Elk
GEOTECHNICAL EARTHQUAKE ENGINEERING AND SOIL DYNAMICS V: SLOPE STABILITY AND LANDSLIDES, LABORATORY TESTING, AND IN SITU TESTING
(2018)
Article
Geochemistry & Geophysics
Peter J. Stafford, Adrian Rodriguez-Marek, Benjamin Edwards, Pauline P. Kruiver, Julian J. Bommer
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2017)
Article
Geochemistry & Geophysics
Adrian Rodriguez-Marek, Pauline P. Kruiver, Piet Meijers, Julian J. Bommer, Bernard Dost, Jan van Elk, Dirk Doornhof
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2017)
Article
Engineering, Geological
Pauline P. Kruiver, Ewoud van Dedem, Remco Romijn, Ger de lange, Mandy Korff, Jan Stafleu, Jan L. Gunnink, Adrian Rodriguez-Marek, Julian J. Bommer, Jan van Elk, Dirk Doornhof
BULLETIN OF EARTHQUAKE ENGINEERING
(2017)
Article
Engineering, Civil
Julian J. Bommer, Peter J. Stafford, Benjamin Edwards, Bernard Dost, Ewoud van Dedem, Adrian Rodriguez-Marek, Pauline Kruiver, Jan van Elk, Dirk Doornhof, Michail Ntinalexis
EARTHQUAKE SPECTRA
(2017)