Article
Engineering, Geological
Giovanni Forte, Luca Verrucci, Anita Di Giulio, Melania De Falco, Paolo Tommasi, Giuseppe Lanzo, Kevin W. Franke, Antonio Santo
Summary: The 2016 Italian seismic sequence was characterized by three main shocks, with the strongest being a Mw 6.5 event triggering numerous seismic events and observed landslides.
ENGINEERING GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Simona Gabrielli, Aybige Akinci, Luca De Siena, Edoardo Del Pezzo, Mauro Buttinelli, Francesco Emanuele Maesano, Roberta Maffucci
Summary: Deep fluid circulation is likely responsible for the large extensional events of the 2016-2017 Central Italy seismic sequence. This study demonstrates the use of peak delays, a proxy for scattering attenuation, in mapping thrusts and sedimentary structures and their influence on fluid overpressure and release. The results highlight the control of thrusts and paleogeography on the sequence and suggest the monitoring potential of this technique for seismic hazard assessment.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Aybige Akinci, Irene Munafo, Luca Malagnini
Summary: This study investigated the seismic sequence in the central Apennines, Italy from 2016 to 2017. It found that the main events had a strong impact on crustal S-wave attenuation, but the fluctuations in 1/Q(f) had a minimal effect on earthquake-induced ground motions and the seismic hazard.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
M. Sugan, S. Campanella, L. Chiaraluce, M. Michele, A. Vuan
Summary: Approximately 23,000 earthquakes from 2009 to 2016 were used to analyze the seismic activity preceding the 2016 Central Italy seismic sequence. It was discovered that the seismic activity mainly occurred near faults and developed in foreshock-mainshock and swarm-like clusters. The progressive localization of the seismic activity weakened the locked patch of the Amatrice mainshock.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Simona Gabrielli, Aybige Akinci, Guido Ventura, Ferdinando Napolitano, Edoardo Del Pezzo, Luca De Siena
Summary: This study investigates the spatial extent and mechanisms of fluid migration and diffusion during the 2016 Amatrice-Visso-Norcia seismic sequence in Central Italy. The authors found that structural discontinuities and lithology control scattering losses, while absorption is not sensitive to main geological structures. They attribute the development of high absorption anomalies during the sequence to the migration of CO2-bearing fluids from a deep source close to the Amatrice earthquake.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Emanuele Tondi, Danica Jablonska, Tiziano Volatili, Maddalena Michele, Stefano Mazzoli, Pietro Paolo Pierantoni
Summary: The study reveals that the seismic events in L'Aquila in 2009 and Amatrice-Visso-Norcia in 2016 were caused by two seismogenic faults, with potential seismic activity in the Campotosto area. The Monte Gorzano Fault, previously considered an active seismic structure, is now suggested to have early geological origins. This new understanding of seismic activity provides valuable insights for earthquake hazard assessment in the region.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2021)
Article
Geochemistry & Geophysics
E. Mandler, F. Pintori, A. Gualandi, L. Anderlini, E. Serpelloni, M. E. Belardinelli
Summary: The study focuses on the post-seismic deformation of the 2016-2017 Central Italy earthquake sequence, emphasizing the role of afterslip and aseismic deformation on surrounding structures. It also suggests the possibility of a brittle-ductile transition contributing to the post-seismic displacement in the far-field domain.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Multidisciplinary Sciences
Lauro Chiaraluce, Maddalena Michele, Felix Waldhauser, Yen Joe Tan, Marcus Herrmann, Daniele Spallarossa, Gregory C. Beroza, Marco Cattaneo, Claudio Chiarabba, Pasquale De Gori, Raffaele Di Stefano, William Ellsworth, Ian Main, Simone Mancini, Lucia Margheriti, Warner Marzocchi, Men-Andrin Meier, Davide Scafidi, David Schaff, Margarita Segou
Summary: This article documents six earthquake catalogues developed using various methods for the 2016-2017 central Italy seismic sequence. These catalogues vary in resolution and completeness due to progressive improvements in data availability, detection sensitivity, and hypocentral location accuracy.
Article
Engineering, Geological
Chiara Felicetta, Claudia Mascandola, Daniele Spallarossa, Francesca Pacor, Salomon Hailemikael, Giuseppe Di Giulio
Summary: This study focuses on site response analyses in the Amatrice area in Central Italy, utilizing a temporary seismic network and detailed site characterization. Empirical methods are applied to evaluate site response parameters, showing significant variability among different sites. Cluster analysis reveals common features among sites and may be promising for future site response estimation based on velocity profiles and noise measurements.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Melania Moschella, Maria Grazia Ciaccio, Diana Latorre
Summary: This study analyzes minor seismic sequences recorded in the Amatrice-Norcia area in the four decades before the 2016 earthquakes, showing low instrumental seismicity rates and different types of seismic behaviors. By relocating past seismic activity and comparing it to recent events, the study reveals correlations between the two and highlights the importance of minor seismic sequences in assessing seismic hazard.
Article
Engineering, Geological
M. Acito, M. S. Garofane, E. Magrinelli, G. Milani
Summary: An extensive numerical investigation was conducted on the structural performance of the masonry church of Sant'Agostino in Amatrice, Italy during the 2016-2017 seismic sequence. The study analyzed the seismic behavior of the church in relation to the most energetic shocks of the sequence, and evaluated the influence of local amplification effects on the structural behavior.
BULLETIN OF EARTHQUAKE ENGINEERING
(2021)
Article
Construction & Building Technology
Francesco Clementi
Summary: This study aims to create a coherent sensitivity study on several specific case studies to understand the impact of geometry and irregularities on church structures. Pushover analysis demonstrates that masonry behaves as a nonlinear material with different tensile and compressive strengths.
Article
Multidisciplinary Sciences
Filippo Carboni, Massimiliano Porreca, Emanuela Valerio, Manzo Mariarosaria, Claudio De Luca, Salvatore Azzaro, Maurizio Ercoli, Massimiliano R. Barchi
Summary: This study uses DInSAR technique and ALOS-2 SAR data to map the surface deformation produced by the M. Vettore Fault System during the 2016 earthquakes in central Italy. The results show that the DInSAR technique can provide important information on fault segments, spatial distribution, and interaction soon after seismic events, which is crucial for emergency management and geological field surveys.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Joan Grau, Kang Liang, Jae Ogilvie, Paul Arp, Sheng Li, Bonnie Robertson, Fan-Rui Meng
Summary: The study used UAV and photogrammetry method to map boundaries of riparian zones, showing that high-resolution UAV-derived DEM had high agreement with field-measured riparian zones, making it a suitable approach in agricultural watersheds.
Article
Geochemistry & Geophysics
Kilian B. Kemna, Alessandro Verdecchia, Rebecca M. Harrington
Summary: This study investigates the spatio-temporal distribution of the static stress drop values of the 2016-2017 multi-fault rupture seismic sequence in central Italy. The results show an apparent increase of stress drop following large earthquakes, with high stress drop events correlating with fault complexity.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Engineering, Geological
K. Onder Cetin, George Mylonakis, Anastasios Sextos, Jonathan P. Stewart
Summary: The Aegean Sea earthquake on October 30, 2020 caused a tsunami, collapsed structures, and various geotechnical effects. Due to the COVID-19 pandemic, international teams were not deployed, instead Greek and Turkish teams coordinated reconnaissance efforts, resulting in a joint report. Key lessons spanning seismology to emergency response were summarized from the event.
BULLETIN OF EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Civil
Grace A. Parker, Jonathan P. Stewart, David M. Boore, Gail M. Atkinson, Behzad Hassani
Summary: This research develops semi-empirical ground motion models to predict seismic ground motion for subduction earthquakes. The models are developed using data analysis, regression analysis, simulations, and geometrical constraints, and can capture source and path effects for interface and intraslab events. The development of these models is important for seismic hazard assessment and building design.
EARTHQUAKE SPECTRA
(2022)
Article
Engineering, Geological
M. G. Durante, S. J. Brandenberg, E. Ausilio, P. Zimmaro
Summary: The spatial variation of ground motion (SVGM) significantly affects the response of infrastructure systems. In this study, the combined effect of wave passage and topographic features is explored through numerical experiments using the finite element method. The results show that this combined effect can modify the amplitude and shape of the input motion, influencing soil-structure interaction processes.
BULLETIN OF EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Civil
Grace A. Parker, Jonathan P. Stewart
Summary: We present an ergodic site response model for subduction zone ground-motion models, which predicts site amplification of different ground-motion parameters for different oscillator periods. The model depends on shear-wave velocity, basin depth, and region, and is independent of subduction earthquake type. A global V-S(30)-scaling model is provided along with regional adjustments for different regions. Our model shows comparable results to a prior model for shallow earthquakes in active tectonic regions at short periods, but weaker results at long periods, and the nonlinear site response is generally less pronounced.
EARTHQUAKE SPECTRA
(2022)
Article
Engineering, Civil
Sean K. Ahdi, Dong Youp Kwak, Timothy D. Ancheta, Victor Contreras, Tadahiro Kishida, Annie O. Kwok, Silvia Mazzoni, Francisco Ruz, Jonathan P. Stewart
Summary: This passage introduces the organization of NGA-Sub data resources into a relational database and describes the Site table within that structure. It provides metadata for 6502 stations that have recorded earthquakes. The critical parameters for ground motion modeling, such as time-averaged shear-wave velocity (V-S(30)) and depths to various V-S horizons, are discussed. Proxy-based estimation frameworks are used when reliable data is not available, and uncertainties are provided for validation-free estimates.
EARTHQUAKE SPECTRA
(2022)
Article
Engineering, Civil
Victor Contreras, Jonathan P. Stewart, Tadahiro Kishida, Robert B. Darragh, Brian S. J. Chiou, Silvia Mazzoni, Robert R. Youngs, Nicolas M. Kuehn, Sean K. Ahdi, Katie Wooddell, Ruben Boroschek, Fabian Rojas, Jennyfer Ordenes
Summary: We present the source and path attributes of the NGA-Sub project's relational database, which contains information on 991 earthquakes from 1937 to 2016. The curated data includes earthquakes with high magnitudes, with 73% having M > 5 and 13 events having M > 8. The attributes in the database cover moment tensor, finite-fault parameters, and categorizations based on event types and sequence classification.
EARTHQUAKE SPECTRA
(2022)
Article
Engineering, Civil
Silvia Mazzoni, Tadahiro Kishida, Jonathan P. Stewart, Victor Contreras, Robert B. Darragh, Timothy D. Ancheta, Brian S. J. Chiou, Walter J. Silva, Yousef Bozorgnia
Summary: The NGA-Sub project has developed a relational database containing data resources and ground motion models for global subduction zone regions. The database consists of 20 tables and contains 71,340 three-component records from 1880 earthquakes. The data can be accessed to obtain ground motion intensity measures for different oscillator periods.
EARTHQUAKE SPECTRA
(2022)
Article
Engineering, Civil
Yousef Bozorgnia, Norman A. Abrahamson, Sean K. 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, I. M. Idriss, Chen Ji, Tadahiro Kishida, Albert R. Kottke, Nicolas Kuehn, DongYoup Kwak, Annie O-L Kwok, P. Lin, Jorge Macedo, Silvia Mazzoni, Saburoh Midorikawa, Sifat Muin, Grace A. Parker, Sanaz Rezaeian, Hongjun Si, Walter J. Silva, Jonathan P. Stewart, Melanie Walling, Katie Wooddell, Robert R. Youngs
Summary: This article summarizes the Next Generation Attenuation (NGA) Subduction (NGA-Sub) project, which aims to develop a database and ground motion models (GMMs) for subduction regions. The project has developed the largest global database of subduction earthquakes, with 214,020 individual records from 1,880 subduction events. Four GMMs have been developed, including three global subduction GMMs and one Japan-specific model. The GMMs provide median predictions and variability for various ground motion parameters, and account for epistemic uncertainty in regions with sparse data. A damping scaling model has also been developed for adjusting predicted results.
EARTHQUAKE SPECTRA
(2022)
Article
Geochemistry & Geophysics
Pengfei Wang, Paolo Zimmaro, Tristan E. Buckreis, Tatiana Gospe, Scott J. Brandenberg, Sean K. Ahdi, Alan Yong, Jonathan P. Stewart
Summary: Frequency-dependent horizontal-to-vertical spectral ratios (HVSRs) can provide useful information for site response modeling, but are not commonly included in ground-motion models. To facilitate the use of HVSR, we developed a publicly accessible relational database that contains microtremor-based HVSR data and supporting metadata. Users can interact with the data through a graphical user interface or use external tools for further analysis.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Editorial Material
Engineering, Geological
Sandro Carbonari, Francesca Dezi, Luis Alberto Padron, Paolo Zimmaro
BULLETIN OF EARTHQUAKE ENGINEERING
(2022)
Article
Construction & Building Technology
Han Sun, Henry Burton, Jonathan P. Stewart, John W. Wallace
Summary: Models for reconstructing seismic response demands across multiple buildings can aid in cluster-level rapid postearthquake damage assessment. Given the recorded responses for a subset of instrumented buildings in a cluster, the demands in the uninstrumented buildings can be reconstructed by combining the median values generated from the structural response prediction model (SRPM) and estimated within-event residuals obtained from the kriging model.
JOURNAL OF STRUCTURAL ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Junju Xie, Xiaojun Li, Zengping Wen, Lin Jia, Zhao An, Jianwen Cui, Guoliang Lin, Qian Zhang, Peng Jiang, Quancai Xie, Pengfei Wang, Paolo Zimmaro, Jonathan P. Stewart
Summary: This study focuses on developing ground-motion data resources for China by compiling and analyzing geotechnical soil profiles and shear-wave velocity (VS) logs. The study provides site parameters and classifications for stations in western China, contributing significant data for earthquake research and engineering design.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Ernesto Ausilio, Maria Giovanna Durante, Paolo Zimmaro
Summary: The performance of critical infrastructure systems located in seismic areas and subjected to ageing effects needs to be periodically re-evaluated. This study presents a framework for seismic re-evaluations, starting with an analysis of historical and new information, performing a multi-epoch consistency analysis, and defining a pragmatic geotechnical model. The study also proposes a consistent approach for site-specific probabilistic seismic hazard analysis to develop appropriate ground motions.
