Article
Geosciences, Multidisciplinary
Jose Pablo Sepulveda, Raffaello Cioni, Alvaro Aravena
Summary: This study characterizes the morphology of intermediate to silicic lava flows and investigates their relationship with thickness distribution, pre-surface slope, composition, and rheology. It is found that the pre-eruptive slope, effusion rate, and viscosity of the lava play important roles in determining the lava flow morphology. Four main types of lava flows are identified based on the analysis of 49 intermediate to silicic lava flows.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geochemistry & Geophysics
Lucas M. Fennell, Mark T. Brandon, Michael T. Hren
Summary: This study uses the isotope-paleotopography method to analyze the topographic evolution of the Southern Central Andes and adjacent foreland. The results show that isotopic fractionation of precipitation is mainly influenced by topographic uplift. Additionally, the study reveals that the topography of the eastern side of the Malargue basin has been relatively stable in the past 55 million years, but has experienced significant changes between 15 million to present.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Environmental Sciences
Soledad Perez Catan, Debora Bubach, Maria Ines Messuti, Maria Angelica Arribere, Sergio Ribeiro Guevara
Summary: This study evaluated the influence of volcanic eruptions on Hg bioaccumulation in fruticose lichens and identified the sources of volcanic ash using geological techniques. The results suggest that the patterns of REEs in fruticose lichens can serve as a proxy record of elements released from volcanic sources.
ATMOSPHERIC POLLUTION RESEARCH
(2022)
Article
Geochemistry & Geophysics
Andrzej Galas, Paulina Lewinska, Rigoberto Aguilar, Lukasz Nowak
Summary: The Valley of the Volcanoes is a representative area of the Quaternary Andahua Group, and the history of its volcanic activity was reconstructed using satellite data and remote sensing. Analysis of 12 lava fields in the region revealed the presence of 41 small lava domes and 23 scoria cones. By utilizing techniques such as NDVI and Topographic Position Index, maps of the terrain were created, allowing for the identification of possible future volcanic eruptions.
JOURNAL OF GEODYNAMICS
(2023)
Article
Geochemistry & Geophysics
Andrzej Galas, Jaroslaw Majka, Adam Wlodek
Summary: Euhedral andradite crystals were found in trachyandesitic lavas of the volcanic Andahua Group in the Central Andes. The chemical compositions of the garnet and its inclusions suggest their contact metamorphic origin, indicating potential hazards associated with volcanism.
MINERALOGY AND PETROLOGY
(2021)
Article
Water Resources
Magdalena Fuentealba, Camila Bahamondez, Pablo Sarricolea, Oliver Meseguer-Ruiz, Claudio Latorre
Summary: The study focused on mountain lakes in central Chile from 32 degrees to 36 degrees South, analyzing changes in lake surfaces over the past 36 years. Results showed a decrease in the number and surface area of lakes from south to north, consistent with the current rainfall gradient. During the 'megadrought' from 2010 to 2020, lake surface areas decreased significantly between 7% and 25%, highlighting the importance of freshwater availability for the region's society and environment.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Geochemistry & Geophysics
Camila Pineda, Julia Hammer, Emily First, Diego Morata
Summary: The Pudahuel Ignimbrite is a rhyolitic deposit associated with the Diamante caldera in the Southern Andes, with analytical and experimental approaches used to determine pre-eruptive magmatic conditions. Pre-eruptive temperatures and water contents were estimated based on composition analysis of the ignimbrite, suggesting deep magma storage and the possibility of an external trigger for caldera formation rather than internal pressurization. This study provides a foundation for further research on the Maipo volcanic complex and its associated hazards.
Article
Geography, Physical
Fernanda S. Santos, Carlos A. Sommer, Mauricio B. Haag, Walter A. Baez, Alberto T. Caselli, Alejandro D. Baez
Summary: Monogenetic volcanoes are common volcanic landforms on Earth. The Southern Volcanic Zone of the Andes is one of the most active magmatic regions and is characterized by the presence of monogenetic volcanoes in the Zapala Volcanic Field. Compared to monogenetic fields in the Central Andes, the Zapala Volcanic Field has higher vent densities and more phreatomagmatic landforms.
Article
Geochemistry & Geophysics
Sebastian Jimenez-Rodriguez, Jay Quade, Matthew Dettinger, Katharine W. Huntington, Julia R. Kelson
Summary: This study highlights the limitations of using carbonate archives in reconstructing past elevations in the Central Andes. The results show that paleoaltimetry estimates based on carbonates significantly underestimate the results obtained from volcanic glass using stable hydrogen isotopes.
Article
Geosciences, Multidisciplinary
Rigoberto Aguilar, Jean-Claude Thouret, Pablo Samaniego, Gerhard Woerner, Brian Jicha, Jean-Louis Paquette, Edwin Suana, Anthony Finizola
Summary: Large volcanic clusters (LVCs) in the Central Andes, such as the Chachani-LVC, have been less explored compared to smaller and shorter-lived individual stratovolcanoes. This study provides insights into the eruptive history and magmatic regimes of the C-LVC, showing temporal changes in magma composition and evidence of magma mixing and disequilibrium in shallow magma reservoirs.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Energy & Fuels
Yao Luo, Ruohan Hu, Bei Lv, Yongming Li, Rong Wang, Xianli Wen
Summary: This paper provides an overview of the basic characteristics of the Carboniferous volcanic reservoirs in J230 area of Xinjiang oilfield. The triaxial in-situ stresses and natural fissure characteristics are interpreted using well-logging data and imaging well logging information, respectively. The intersection of geometry relationship between hydraulic fracture and cross natural cracks is described, and a hydraulic fracture propagation model is obtained by considering the synergy between hydraulic and natural cracks. The study shows that shear sliding failure is induced along the natural-hydraulic fracture interface, followed by the opening of natural fissures due to net pressure, and with further increase of net fluid pressure, hydraulic fracture propagates along the natural fissure and turns to the direction of maximum horizontal principal stress, facilitating the formation of network fractures.
Article
Geochemistry & Geophysics
Sheng-Sheng Chen, Wei-Ming Fan, Ren-Deng Shi, Ji-Feng Xu, Ke Yang, Zheng Pan
Summary: This study presents an analysis of volcanic rocks from the Yunzhug area in northern Lhasa, providing insights into an important stage of tectono-magmatic events in the region. The rocks consist of high-K affinity A-type rhyolites and andesites, originating from a mixed mantle source with contributions from continental crust melting.
Article
Geochemistry & Geophysics
B. van Alderwerelt, I. A. Ukstins, F. C. Ramos
Summary: The Cerro Overo maar in the Central Andes is the most mafic lava found within the modern subduction arc, preserving signals from deep-crustal or upper mantle magmatism. Researchers have debated whether the enriched isotope ratios in this region are from the mantle source or crustal processes. The Olivine-hosted melt inclusions provide evidence that the radiogenic isotopic characteristic of the region results from lithospheric processes rather than inheritance.
Article
Geosciences, Multidisciplinary
Pablo Grosse, Silvina R. Guzman, Francois Nauret, Yuji Orihashi, Hirochika Sumino
Summary: This study investigates the growth history of the Peinado composite volcano and the interaction between central and lateral volcanic activity. The results suggest a shift in activity from the central vent to the mid-flank vents and indicate the possibility of future collapse of the volcano.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Heather McFarlin, Glenn Thompson, Stephen R. McNutt, Jochen Braunmiller, Michael E. West
Summary: The Lazufre Volcanic System, located on the border of northern Chile and Argentina, lacks regular monitoring despite being recognized as a top volcanic hazard. By deploying seismic stations, this study reveals that most seismic events occur beneath the Lastarria volcano, suggesting fluid and gas movement associated with regional magma zones and inflation centers drive the seismic activity. These findings confirm that the previously observed inflation signals are volcanic in origin.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Gabor Kereszturi, Michael Heap, Lauren N. Schaefer, Herlan Darmawan, Frances M. Deegan, Ben Kennedy, Jean-Christophe Komorowski, Stuart Mead, Marina Rosas-Carbajal, Amy Ryan, Valentin R. Troll, Marlene Villeneuve, Thomas R. Walter
Summary: Volcano slope stability analysis is essential for volcanic hazard assessment and monitoring. This study developed a novel chemometric-based method using visible to shortwave infrared reflected light spectroscopy to estimate rock strength and porosity. The spectroscopic analysis provided a first order assessment of rock strength and alteration mineralogy, offering an accurate non-destructive way of assessing rock strength and porosity.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Eoghan P. Holohan, Sam Poppe, Audray Delcamp, Paul K. Byrne, Thomas R. Walter, Benjamin van Wyk de Vries, Matthieu Kervyn
Summary: Many volcanoes show evidence of long-term deformation driven by gravity, which affects the development of magmatic plumbing systems and volcanic vent locations. This deformation can manifest as earthquakes and ground surface motions. By revisiting classic experiments and using digital imaging techniques, it has been observed that volcano deformation can transition from sagging to spreading as the volcano grows.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Multidisciplinary Sciences
Simon Plank, Alina V. Shevchenko, Pablo d'Angelo, Veronika Gstaiger, Pablo J. Gonzalez, Simone Cesca, Sandro Martinis, Thomas R. Walter
Summary: This study presents a multi-sensor thermal-and-topographic satellite data analysis to estimate lava effusion rates and volumes during the 2021 eruption of Cumbre Vieja. By combining different data sources, high-frequency observation of effusion rate trends and accurate total volume estimates are achieved. The results reveal a subaerial-lava volume of 212 x 10(6) +/- 13 x 10(6) m(3) with a MOR of 28.8 +/- 1.4 m(3)/s, showing an initially sharp increase followed by a gradual decrease with two short-lived peaks in mid/end November. The study also demonstrates the correlation between eruption rate fluctuations and seismic activity, suggesting changes in the underlying pathway during the eruption.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Geological
Pierluigi Confuorto, Nicola Casagli, Francesco Casu, Claudio De Luca, Matteo Del Soldato, Davide Festa, Riccardo Lanari, Mariarosaria Manzo, Giovanni Onorato, Federico Raspini
Summary: The use of synthetic aperture radar imagery for landslide inventory updates is essential for risk management and territorial planning. The application of automatic SAR data processing has been used to update the Italian national landslide database. The study demonstrates that the nationwide use of Sentinel-1 MTInSAR data could provide fundamental support for landslide inventory updates.
Article
Multidisciplinary Sciences
Sebastien Valade, Diego Coppola, Robin Campion, Andreas Ley, Thomas Boulesteix, Noemie Taquet, Denis Legrand, Marco Laiolo, Thomas R. Walter, Servando De la Cruz-Reyna
Summary: By using high-resolution satellite radar imagery and deep-learning, researchers have successfully imaged the repetitive construction-subsidence cycles of lava domes at Popocatepetl volcano. The results show that these cycles resemble the rise and fall of the upper magma column driven by gas, and that gas plays a key role in the morphological evolution of the domes.
NATURE COMMUNICATIONS
(2023)
Article
Geochemistry & Geophysics
Peter Makus, Christoph Sens-Schoenfelder, Luc Illien, Thomas R. Walter, Alexander Yates, Frederik Tilmann
Summary: This study analyzes seismic data from the Klyuchevskoy Volcanic Group in Russia to study signals related to volcanic activity. A new technique called time-segmented passive image interferometry is proposed to detect volcanic inflation and deflation. The results show that rainfall and snowfall have the strongest influence on the properties of rocks, and an eruption cycle in 2016 is associated with a significant increase in velocity.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Gilles Seropian, Kaylon Higginbotham, Ben M. Kennedy, Lauren N. Schaefer, Thomas R. Walter, Arianna Soldati
Summary: The rising velocity of air bubbles in non-Newtonian shear-thinning fluids can be significantly increased by mechanical oscillations. The results of the experiments help explain the behavior of such fluids and have implications for the study of earthquake-volcano interactions.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
Pouria Marzban, Stefan Bredemeyer, Thomas R. Walter, Friederike Kaestner, Daniel Mueller, Sabine Chabrillat
Summary: By combining high-resolution imagery from satellites and Unoccupied Aircraft Systems, we analyzed the proximal deposits of the 21 July 2014 landslide at Askja (Iceland) and identified a hydrothermally altered material class in the northern part of the landslide source region. We were able to further determine the involved types of rocks and the degree of hydrothermal alteration by comparing the classification result to in-situ hyperspectral measurements. This study has important implications for hazard assessment in the Askja caldera and elsewhere.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Remote Sensing
Qing Zhao, Antonio Pepe, Virginia Zamparelli, Pietro Mastro, Francesco Falabella, Saygin Abdikan, Caglar Bayik, Fusun Balik Sanli, Mustafa Ustuner, Nevin Betul Avsar, Jingjing Wang, Peng Chen, Zhengjie Li, Adam T. Devlin, Fabiana Calo
Summary: RS technologies are widely used in various fields by scientists and local authorities for surface monitoring and research. Efforts have been made to improve Earth Observation operations, including the DRAGON initiative sponsored by ESA and MOST since the early 2000s. This manuscript provides an overview of recent research activities and new methods, including flood risk analysis, ground displacement estimation and removal, inundation risk analysis, and SAR-based marine applications.
GEO-SPATIAL INFORMATION SCIENCE
(2023)
Article
Geochemistry & Geophysics
Paolo Berardino, Antonio Natale, Carmen Esposito, Riccardo Lanari, Stefano Perna
Summary: This work addresses the focusing of airborne synthetic aperture radar (SAR) data in the presence of highly variable squint angles. To achieve this, a time-domain SAR focusing algorithm has been developed to consider the target-dependent nature of the acquisition squint angle. Real data from two different X-band airborne SAR systems have been analyzed, and the results show that the adoption of an azimuth-invariant processing squint angle may not be suitable for airborne missions corrupted by motion errors induced by atmospheric turbulence. The proposed time-domain focusing strategy, which exploits a target-dependent processing squint angle, proves to be more appropriate.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Proceedings Paper
Engineering, Civil
Andrea Miano, Annalisa Mele, Manuela Bonano, Fabio Di Carlo, Riccardo Lanari, Michele Manunta, Alberto Meda, Andrea Prota, Anna Saetta, Alberto Stella, Diego Talledo
Summary: The field of Structural Health Monitoring (SHM) has gained increasing interest, especially in multi-hazard prone areas like Italy. The advanced multi-temporal differential interferometry synthetic aperture radar (MT-DInSAR) techniques show great potential for SHM applications and future development. This study presents and discusses a case study of the Torri Stellari buildings in Rome, Italy, using SBAS DInSAR processing technique for monitoring and assessing the structural behavior.
EUROPEAN WORKSHOP ON STRUCTURAL HEALTH MONITORING (EWSHM 2022), VOL 2
(2023)
Proceedings Paper
Engineering, Civil
F. Di Carlo, A. Mele, A. Miano, M. Bonano, M. F. P. Esposito, R. Lanari, A. Meda, R. Porti, A. Prota
Summary: The paper presents an application of multi-temporal Differential Synthetic Aperture Radar Interferometry (MT-DInSAR) techniques in the structural analysis of the Vittorino da Feltre school building in Rome. By correctly positioning the reflecting targets on the 3D geometry of the structure, displacement time series, mean deformation velocity values, and continuous maps of the vertical and East-West velocity components are obtained using COSMO-SkyMed SAR data collected from 2011 to 2019. Comparing the results with the on-site detected cracking pattern can provide a better understanding of the ongoing phenomena for a proper damage assessment.
EUROPEAN WORKSHOP ON STRUCTURAL HEALTH MONITORING (EWSHM 2022), VOL 3
(2023)
Proceedings Paper
Engineering, Civil
Annalisa Mele, Ilaria Giannetti, Matteo Rompato, Manuela Bonano, Francesca Bozzano, Fabio Di Carlo, Riccardo Lanari, Paolo Mazzanti, Alberto Meda, Andrea Miano, Nicoletta Nappo, Andrea Prota, Gabriele Scarascia Mugnozza
Summary: This study utilizes remote sensing techniques and GIS environment to perform structural health monitoring on the residential area of Valco San Paolo in Rome, combining historical documents and engineering-geology information, in order to assess the impact of ground movements on the constructions.
EUROPEAN WORKSHOP ON STRUCTURAL HEALTH MONITORING (EWSHM 2022), VOL 3
(2023)
Proceedings Paper
Engineering, Civil
Diego Talledo, Alberto Stella, Manuela Bonano, Fabio Di Carlo, Riccardo Lanari, Michele Manunta, Alberto Meda, Annalisa Mele, Andrea Miano, Andrea Prota, Anna Saetta
Summary: Structural Health Monitoring (SHM) is a field of increasing interest, particularly in a country like Italy with a rich cultural heritage. Advanced multi-temporal differential interferometry synthetic aperture radar (MT-DInSAR) is a promising new technology with great potential for monitoring and assessing cultural heritage structures. The authors applied their general framework for structural monitoring and assessment to the San Michele building in Rome, using COSMO-SkyMed (CSK) data and the Small Baseline Subset (SBAS) method to obtain deformation time series and mean velocity maps of the persistent scatterers in the area. Various techniques were then applied and critically discussed for assessing the structural behavior and monitoring of the construction.
EUROPEAN WORKSHOP ON STRUCTURAL HEALTH MONITORING (EWSHM 2022), VOL 3
(2023)
Article
Geosciences, Multidisciplinary
Agust Gudmundsson, Kyriaki Drymoni, John Browning, Valerio Acocella, Falk Amelung, Fabio L. Bonali, Abdelsalam Elshaafi, Ines Galindo, Nobuo Geshi, Adelina Geyer, Michael J. Heap, Ozgur Karaoglu, Shigekazu Kusumoto, Joan Marti, Virginie Pinel, Alessandro Tibaldi, Thorvaldur Thordarson, Thomas R. Walter
Summary: Volcanotectonics combines techniques, data, and ideas from multiple disciplines to study the physical processes within volcanoes and improve the accuracy of volcano behavior and eruption forecasting.
BULLETIN OF VOLCANOLOGY
(2022)
