Article
Multidisciplinary Sciences
Adolfo Antonio Gutierrez, Ricardo Mon, Ahmad Arnous, Rodolfo German Aranda-Viana
Summary: The study demonstrates neotectonic deformation in the southern piedmont of the Cumbres Calchaquies, manifesting through faults, folds, and drainage channel diversions. The seismic energy dissipates through valley fill materials, generating discrete fault scarps and strongly folded conglomerate strata.
SN APPLIED SCIENCES
(2021)
Article
Environmental Sciences
Chenglong Dai, Weijun Gan, Zhangjun Li, Shiming Liang, Genru Xiao, Keliang Zhang, Ling Zhang
Summary: By analyzing GPS observations in the area affected by the 2021 Yangbi Ms 6.4 earthquake in Yunnan, China, researchers obtained high-resolution GPS velocity and strain rate fields, as well as slip rates of major faults using a displacement model and GPS constraints. The regional seismic risk was evaluated by calculating seismic moment accumulation and release rates, deficit rates, and considering the characteristics of small earthquakes. The study found localized strain accumulation and deflection in the seismogenic area of the impending earthquake, providing important hints for identifying potential areas of future strong earthquakes.
Article
Geochemistry & Geophysics
Sara Figueroa, Jonathan R. Weiss, Fernando Hongn, Heiko Pingel, Leonardo Escalante, Leonardo Elias, R. German Aranda-Viana, Manfred R. Strecker
Summary: Research shows that there are significant differences in the tectonic activity characteristics and patterns between the thick-skinned fold-and-thrust belt on the eastern flank of the Andean Plateau in northwestern Argentina and the thin-skinned Subandean fold-and-thrust belt of northern Argentina and southern Bolivia. Estimating and comparing deformation rates and patterns across different timescales can provide a better understanding of the deformation processes in these mountain ranges.
Article
Geosciences, Multidisciplinary
Vicente Yanez-Cuadra, Marcos Moreno, Francisco Ortega-Culaciati, Felipe Donoso, Juan Carlos Baez, Andres Tassara
Summary: We analyzed the crustal motions in areas affected by large subduction earthquakes along the Chilean Trench using unsupervised machine learning techniques. By using the agglomerative clustering algorithm, we investigated the spatial patterns of GNSS regional velocities and presented a continental-scale velocity field. Two different pre-processing methodologies were tested, and the results demonstrate the effectiveness of this approach in mapping active deformation patterns.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geochemistry & Geophysics
Shao-Jinn Chin, Rupert Sutherland, Martha K. Savage, John Townend, Julien Collot, Bernard Pelletier, Olivier Monge, Finnigan Illsley-Kemp
Summary: We used a network of seismometers near Noumea, the capital city of New Caledonia, to record and analyze earthquakes for 14 months. The earthquakes in southern New Caledonia are smaller but more hazardous due to their shallow depths and proximity to local communities. Our study highlights the need for long-term monitoring of local earthquakes in this region and suggests that current models overestimate the hazard from large earthquakes in nearby subduction zones. Further research is needed to improve ground motion prediction in subduction zone footwall settings.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Sreevalsa Kolathayar
Summary: This paper reviews historical and recent seismicity in Delhi and updates the seismic hazard map integrated with ward-wise classified population data. It highlights the importance of population density and building types in assessing earthquake risk. Utilizing state-of-the-art techniques, the study analyzes seismic hazard in Delhi based on the latest earthquake information within a 300 km radius.
Article
Geosciences, Multidisciplinary
A. M. Hinchey, H. A. Sandeman, J. P. Butler
Summary: Arc magmatism played a significant role in the growth of continental crust along convergent plate boundaries. In the late Paleoproterozoic-Mesoproterozoic period, the Makkovik Orogen experienced continental arc magmatism at around 1800 Ma after arc-backarc-continent collisions. The granitic rocks in this orogen have compositions typical of A-type granites, with a substantial juvenile mantle component and both reducing and oxidizing conditions during their formation. The magmatic event at around 1800 Ma is interpreted to have occurred post-collisionally following the docking of the Cape Harrison Arc/micro-continent with the North Atlantic Craton during the assembly of the supercontinent Nuna. The timing of this event is also coincident with significant felsic plutonism in the Julianehab Igneous Complex of southern Greenland.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Article
Geochemistry & Geophysics
Hongguang Ji, Dongsheng Chen, Xiaobo Su, Zhen Fu, Daolu Quan
Summary: Mining-induced earthquake is a common risk factor in mining engineering safety. This study analyzed the spatial multifractal characteristics and magnitude-frequency distribution of mine seismicity based on microseismic monitoring data from Huating Coal Mine. The results showed that mine seismicity exhibits obvious spatial multifractal characteristics and follows the Gutenberg-Richter law under high tectonic stress. The fractal dimension and b value are positively correlated, and the spatial distribution of mine seismicity is related to the magnitude-frequency distribution.
Article
Geochemistry & Geophysics
Giovanni Lanzano, Chiara Felicetta, Francesca Pacor, Daniele Spallarossa, Paola Traversa
Summary: In this article, the authors apply the reference-rock identification method to the Italian accelerometric archive and obtain a list of reference rock sites and a corrective factor model. The corrective factor can scale the ground-motion spectra and has a significant effect at high frequencies.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Geosciences, Multidisciplinary
Carlos Herrera, John F. Cassidy, Stan E. Dosso, Jan Dettmer, Wasja Bloch, Christian Sippl, Pablo Salazar
Summary: The study reveals the spatial variability of crustal stress in northern Chile, showing a margin-parallel compressive stress regime along the coast and a strike-slip faulting regime in the Andean Precordillera. The results suggest a connection between these stress regimes and seismic events.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Florin Pavel, Saman Yaghmaei-Sabegh
Summary: This study empirically assesses the control period T-C for intermediate-depth earthquakes. A ground motion database of 700 recordings from 25 seismic events in Romania and other sources worldwide is used. An empirical model is proposed for evaluating the control period T-C, with the main variability attributed to intra-event factors. The comparison between seismic hazard results obtained from the proposed empirical model and the Eurocode 8 draft procedure show that T-C values obtained in this study are larger.
Article
Geology
Brian K. Horton, Tomas N. Capaldi, Nicholas D. Perez
Summary: Convergent plate boundaries exhibit variations in orogenic width and intraplate deformation. Analysis of late Cenozoic contractile deformation along the Andean mountain front highlights the contrasting degrees of deformation advance towards the plate interior and demonstrates the role of lithospheric strengthening, weakening, and/or tectonic inheritance in shaping the orogenic architecture of Cordilleran margins.
Article
Geochemistry & Geophysics
Carlos Benavente, Anderson Palomino, Sam Wimpenny, Briant Garcia, Lorena Rosell, Enoch Aguirre, Jose Machare, Alba M. Rodriguez Padilla, Sarah R. Hall
Summary: Active faults in the forearc of southern Peru present a poorly understood hazard to the region. Through studying the Purgatorio Fault, we have identified the timing and magnitude of the most recent surface-rupturing earthquake, highlighting the importance of establishing a paleoseismic record to differentiate between major megathrust and forearc earthquakes.
Article
Engineering, Geological
Ali Fallah Yeznabad, Sheri Molnar, M. Hesham El Naggar
Summary: Greater Vancouver faces the highest seismic risk in Canada, requiring a probabilistic approach to assess earthquake-induced landslide hazards. By considering uncertainties in seismic parameters and seismic displacement prediction models, probabilistic displacements can be determined to better assess geological hazard risks.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Maria J. Adad, Romina L. Lopez Steinmetz, Federico M. Davila
Summary: The formation of the Andean basin is associated with different geological settings, with Pozuelos Basin in the Puna region being a key area for understanding basin formation hypotheses. Through seismic data interpretation and field surveys, the evolution of Pozuelos Basin during the Cenozoic era was studied, revealing basement thrusting and deformation along its eastern boundary. The basin configuration in late Miocene was isolated and intermontane, whereas during Late Oligocene to Middle Miocene, it behaved as a disconnected depositional zone in an intermontane broken foreland setting.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Francisco Pangaro, Victor A. Ramos, Pablo J. Pazos
Article
Geology
Matias C. Ghiglione, Maximilian Naipauer, Christian Sue, Vanesa Barberon, Victor Valencia, Beatriz Aguirre-Urreta, Victor A. Ramos
CRETACEOUS RESEARCH
(2015)
Article
Geosciences, Multidisciplinary
Beatriz Aguirre-Urreta, Marina Lescano, Mark D. Schmitz, Maisa Tunik, Andrea Concheyro, Peter F. Rawson, Victor A. Ramos
GEOLOGICAL MAGAZINE
(2015)
Article
Geography, Physical
Lucia Sagripanti, Emilio A. Rojas Vera, Guido M. Gianni, Andres Folguera, Jonathan E. Harvey, Marcelo Farias, Victor A. Ramos
Article
Geosciences, Multidisciplinary
Alicia Folguera, Marcelo Zarate, Ana Tedesco, Federico Davila, Victor A. Ramos
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2015)
Article
Geosciences, Multidisciplinary
Victor A. Ramos, Monica Escayola, Pablo Leal, Marcio M. Pimentel, Joao O. S. Santos
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2015)
Article
Geosciences, Multidisciplinary
Vanesa D. Litvak, Mauro G. Spagnuolo, Andres Folguera, Stella Poma, Rosemary E. Jones, Victor A. Ramos
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2015)
Article
Geosciences, Multidisciplinary
A. Folguera, G. Bottesi, I. Duddy, F. Martin-Gonzalez, D. Orts, L. Sagripanti, E. Rojas Vera, V. A. Ramos
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2015)
Article
Geochemistry & Geophysics
Jonathan E. Tobal, Andres Folguera, Jeremias Likerman, Maximiliano Naipauer, Daniel Selles, Florencia L. Boedo, Victor A. Ramos, Mario Gimenez
Article
Geosciences, Multidisciplinary
Victor A. Ramos, Carlos Cingolani, Farid Chemale Junior, Maximiliano Naipauer, Augusto Rapalini
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2017)
Article
Geochemistry & Geophysics
Sofia B. Iannelli, Vanesa D. Litvak, Lucia Fernandez Paz, Andres Folguera, Miguel E. Ramos, Victor A. Ramos
Article
Geosciences, Multidisciplinary
Rafael Lopez-Martinez, Beatriz Aguirre-Urreta, Marina Lescano, Andrea Concheyro, Veronica Vennari, Victor A. Ramos
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2018)
Article
Geosciences, Multidisciplinary
Farid Chemale, Victor A. Ramos, Maximilian Naipauer, Tiago J. Girelli, Mateus Vargas
PRECAMBRIAN RESEARCH
(2018)
Article
Geology
L. Sagripanti, A. Folguera, M. Gimenez, E. A. Rojas Vera, J. J. Fabiano, N. Molnar, L. Fennell, V. A. Ramos
JOURNAL OF IBERIAN GEOLOGY
(2014)
Article
Geology
Victor A. Ramos, Maximiliano Naipauer
JOURNAL OF IBERIAN GEOLOGY
(2014)