Article
Geology
J. Hickey, K. Pascal, M. Head, J. Gottsmann, N. Fournier, S. Hreinsdottir, R. Syers
Summary: This study shows that analysis of surface deformation can help define volcanic repose and eruptive episodes. The continuous magma pressurization observed at Soufriere Hills volcano, despite the absence of recent eruptions, highlights the need for vigilant monitoring and management of the volcano and its surroundings.
Article
Geochemistry & Geophysics
Lucy McGee, Mark Reagan, Simon Turner, R. Stephen Sparks, Heather Handley, Rosa Didonna, Kim Berlo, Sarah Hansen, Jenni Barclay
Summary: The study investigates the mass exchange history between mafic enclaves and andesite hosts during the 2010 eruption at Soufriere Hills Volcano, revealing the complexity of volatile and metal element transfer between magmas and the potential of enclaves as eruption triggers. Results suggest loss of a volatile phase and transport of metals within the deeper plumbing system during differentiation of magmas feeding SHV.
Article
Geosciences, Multidisciplinary
Dinko Sindija, Jurgen Neuberg, Patrick Smith
Summary: This study demonstrates how to process VLP volcanic seismic signals in order to obtain detailed information about the seismo-volcanic source process using synthetic and observed waveforms in the velocity domain, and forward modeling to reveal more details of the source process. This approach helps to retrieve correct source time function and estimate source parameters accurately.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2021)
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
Multidisciplinary Sciences
Eric C. P. Breard, Josef Dufek, Sylvain Charbonnier, Valentin Gueugneau, Thomas Giachetti, Braden Walsh
Summary: Pyroclastic density currents (PDCs), specifically block-and-ash flows (BAFs), are the deadliest volcanic processes on Earth. However, their dynamics and the factors influencing their runout area are poorly understood. This study investigates the impact of evolving grain-size distribution on the runout of BAFs, revealing that rapid changes in grain-size distribution lead to compaction and reduction of pore volume within the first kilometers of their flow. Furthermore, the study shows how granular mixtures can experience fragmentation-induced fluidization, excess pore-fluid pressure, and reduced effective friction coefficient during the initial phase of the BAFs' runout.
NATURE COMMUNICATIONS
(2023)
Article
Geosciences, Multidisciplinary
Damia Benet, Fidel Costa, Gabriela Pedreros, Carlos Cardona
Summary: The study of the Nevados de Chillan volcanic complex in Chile during the current volcanic crisis revealed three main stages of eruption, each influenced by different factors such as shallow magma intrusion, dynamics in the upper part of the system, and shallow gas accumulation. This study emphasizes the importance of integrating volcanic ash studies with other monitoring data to gain a more comprehensive understanding of dome-forming eruptions.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Julien Barriere, Adrien Oth, Nicolas d'Oreye, Josue Subira, Delphine Smittarello, Hugues Brenot, Nicolas Theys, Benoit Smets
Summary: The study analyzed infrasonic records of the Nyiragongo volcano and provided a comprehensive understanding of its eruptive activity by comparing the data with space-based observations.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Julia Eychenne, Lucia Gurioli, David Damby, Corinne Belville, Federica Schiavi, Geoffroy Marceau, Claire Szczepaniak, Christelle Blavignac, Mickael Laumonier, Emmanuel Gardes, Jean-Luc Le Pennec, Jean-Marie Nedelec, Loic Blanchon, Vincent Sapin
Summary: This study assesses the respiratory health hazard posed by the most intense eruptive phase of Tungurahua volcano in 2006. The spatial distribution of ash size fractions and their mineralogy, composition, and morphology were analyzed, and the cytotoxicity and pro-inflammatory potential of the ash were assessed in vitro. The study provides insights into the hazard and variability of respirable ash near Tungurahua.
Article
Geosciences, Multidisciplinary
J. B. Johnson, T. Boyer, L. M. Watson, J. F. Anderson
Summary: We explore the capabilities of volcano opto-acoustics, a promising technique for measuring explosion and infrasound resonance phenomena at open-vent volcanoes. Joint visual and infrasound study at Yasur Volcano (Vanuatu) demonstrate that even consumer-grade cameras are capable of recording infrasound with high fidelity. Optical tracking of pressure wavefields induced by infrasonic waves can be used to identify spectral characteristics, which vary within Yasur's two deep craters and are distinct for explosion and tremor sources.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Rosa Didonna, Fidel Costa, Heather Handley, Simon Turner, Jenni Barclay
Summary: This study investigates the dynamics of magma mingling and mixing using chemical and textural zoning patterns recorded in plagioclase crystals. The results shed new light on the nature and timing of magmatic interactions driving volcanic eruptions.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Geosciences, Multidisciplinary
Alessandro Bonaccorso, Luigi Carleo, Gilda Currenti, Antonino Sicali
Summary: A main challenge in open conduit volcanoes is to detect and interpret the ultra-small strain associated with eruptions such as lava fountains. Etna experienced a violent eruptive sequence of lava fountains two years after the flank eruption of December 2018, with significant strain changes recorded by a high-precision borehole dilatometer network. The strain signals provided useful information on the explosive efficiency and erupted volume, highlighting the importance of these tools in studying explosive eruptions in open conduit volcanoes.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Michael P. Poland, Daniele Carbone, Matthew R. Patrick
Summary: This study utilized continuous gravimeters to monitor the eruption activity of Kilauea Volcano in 2018, providing detailed physical characteristics of lava lakes and data on lava withdrawal, emphasizing the importance of continuous gravity in monitoring active volcanoes.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Environmental Sciences
Sonia Calvari, Giuseppe Nunnari
Summary: The Etna volcano is monitored by the Italian Istituto Nazionale di Geofisica e Vulcanologia-Osservatorio Etneo (INGV-OE) using visible and thermal cameras. A new automated routine is presented in this paper that can accurately detect the starting and ending time, area, elevation, and erupted volume of lava fountains, providing important information for assessing volcanic activity.
Article
Paleontology
Malcolm B. Hart, Jodie K. Fisher, Christopher W. Smart, Rebecca Speers, Deborah Wall-Palmer
Summary: This study analyzed benthic foraminifera in shallow waters near Montserrat, using core samples from four sites. The findings show that the deposition of volcanic ash has affected the process of seafloor recolonization, with different colonization patterns and species diversity observed in different locations.
Article
Geology
R. P. Cole, J. D. L. White, T. Duerig, R. Buttner, B. Zimanowski, M. H. Bowman, C. E. Conway, G. S. Leonard, L. R. Pure, D. B. Townsend
Summary: Research shows that meltwater can accumulate under glaciers on andesitic volcanoes, leading to an increase in meltwater production rates as andesite pushes against an ice wall. The study also suggests that glacial conditions and preeruption edifice morphology are more influential in controlling the style of glaciovolcanism than magma composition and thermal properties. Glaciovolcanic products can serve as useful proxies for paleoenvironment, with a greater range of andesitic products and hydrological environments in which andesite erupts than previously appreciated.
Article
Geosciences, Multidisciplinary
Alexis Falcin, Jean-Philippe Metaxian, Jerome Mars, Eleonore Stutzmann, Jean-Christophe Komorowski, Roberto Moretti, Marielle Malfante, Francois Beauducel, Jean-Marie Saurel, Celine Dessert, Arnaud Burtin, Guillaume Ucciani, Jean-Bernard de Chabalier, Arnaud Lemarchand
Summary: A machine-learning-based model was proposed and trained to classify seismo-volcanic signals, providing objective and reproducible results. The model showed improved accuracy after including new signal classes and analyzing feature weights. However, the model's universality is limited and may require customization for different volcanoes.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2021)
Article
Geochemistry & Geophysics
Jean-Marie Saurel, Jordane Corbeau, Sebastien Deroussi, Tristan Didier, Arnaud Lemarchand, Severine Moune, Lloyd Lynch, Anne-Marie Lejeune, Roberto Moretti, Jean-Christophe Komorowski
Summary: The article introduces the regional seismic network established by IPGP and UWI-SRC, designed to provide real-time seismic data to tsunami warning centers in the Caribbean and adjacent regions. By utilizing different techniques and technologies, the cooperative network is able to continue providing data in case of major natural hazards, with Nanometrics' VSAT technology playing a key role in the system.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
David E. Jessop, Severine Moune, Roberto Moretti, Dominique Gibert, Jean-Christophe Komorowski, Vincent Robert, Michael J. Heap, Alexis Bosson, Magali Bonifacie, Sebastien Deroussi, Celine Dessert, Marina Rosas-Carbajal, Arnaud Lemarchand, Arnaud Burtin
Summary: This study analyzed volcanic unrest at La Soufriere de Guadeloupe using airborne thermal camera surveys and in situ measurements. The results showed that the volcano emits 36.5 +/- 7.9 MW of heat, with dominant fumarolic heat flux. The increasing instability of the volcano and the emergence of new high-flux fumaroles highlight the importance of continued surveillance and research strategies.
BULLETIN OF VOLCANOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Abigail Metcalfe, Severine Moune, Jean-Christophe Komorowski, Geoff Kilgour, David E. Jessop, Roberto Moretti, Yoann Legendre
Summary: Signals of volcanic unrest do not always predict future eruptions accurately. By analyzing past eruptions, researchers can uncover patterns that help understand future volcanic behavior. This study on La Soufriere de Guadeloupe reveals that magma storage and interaction timescales at the volcano can be relatively short.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Engineering, Geological
Marc Peruzzetto, Clara Levy, Yannick Thiery, Gilles Grandjean, Anne Mangeney, Anne-Marie Lejeune, Aude Nachbaur, Yoann Legendre, Benoit Vittecoq, Jean-Marie Saurel, Valerie Clouard, Thomas Dewez, Fabrice R. Fontaine, Martin Mergili, Sophie Lagarde, Jean-Christophe Komorowski, Arnaud Lemarchand, Anne Le Friant
Summary: High discharge debris flows in mountainous and volcanic areas pose significant threats to populations and infrastructures. Modeling these events is challenging due to their complexity and lack of data. This study successfully models a rock avalanche and subsequent remobilization of deposits as a high discharge debris flow using field data and realistic simulation scenarios. The results are consistent with observed data.
ENGINEERING GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Michael J. Heap, David E. Jessop, Fabian B. Wadsworth, Marina Rosas-Carbajal, Jean-Christophe Komorowski, H. Albert Gilg, Nadege Aron, Margaux Buscetti, Laura Gential, Margaux Goupil, Mathilde Masson, Lucie Hervieu, Alexandra R. L. Kushnir, Patrick Baud, Lucille Carbillet, Amy G. Ryan, Roberto Moretti
Summary: The study investigates the thermal properties of variably altered rocks from different volcanic regions. The results show that thermal conductivity and thermal diffusivity decrease with increasing porosity, while specific heat capacity remains relatively unchanged. The effect of alteration on thermal conductivity depends on the rock type, with some rocks showing an increase in thermal conductivity with increasing alteration. Therefore, alteration-induced changes in the thermal properties should be considered when interpreting volcano heat flux data.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Geoffrey A. Lerner, Susanna F. Jenkins, Sylvain J. Charbonnier, Jean-Christophe Komorowski, Peter J. Baxter
Summary: Unconfined pyroclastic density currents (PDCs) are highly dangerous volcanic hazards that can cause significant impacts on inhabited areas. Previous studies have only described a limited number of specific cases of unconfined PDCs. In this study, a comparative analysis is conducted to review the different types of unconfined PDCs, their characteristics, dynamics, and impacts, emphasizing the importance of accounting for these phenomena in emergency management and planning at active volcanoes.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Aude Lavayssiere, Wayne C. Crawford, Jean-Marie Saurel, Claudio Satriano, Nathalie Feuillet, Eric Jacques, Jean-Christophe Komorowski
Summary: In May 2018, an exceptional underwater volcanic eruption offshore Mayotte island in the Indian Ocean led to frequent seismic activity in the region. To better understand and monitor the geological activities in the area, a new network of seismometers and land stations has been deployed since February 2019. Using an improved velocity model and relocation of earthquakes, researchers have identified detailed structures related to the seismic and volcanic activity, providing insights into the fluid pathways and magma reservoirs.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Abigail Metcalfe, Severine Moune, Jean-Christophe Komorowski, Roberto Moretti
Summary: Signals of volcanic unrest have been used successfully to provide insights into the timing, magnitude, intensity, and style of future eruptions. However, analyzing past eruptions is necessary to understand the context for subsequent activity. In this study, the deposits from past eruptions of La Soufriere de Guadeloupe were analyzed to gain understanding of magma processes and explosive eruption styles. The results show that explosive eruption style is controlled by a combination of ascent rate and top-down controls affecting rock strength and stress distribution.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Silvia Massaro, Eduardo Rossi, Laura Sandri, Costanza Bonadonna, Jacopo Selva, Roberto Moretti, Jean-Christophe Komorowski
Summary: The study proposes a probabilistic hazard quantification strategy to assess the impact of volcanic ballistic projectiles (VBPs) based on the variability of eruptive vent locations and wind effects. It shows that topography plays a crucial role in considering the spatial uncertainty of vent locations. The research highlights the importance of a probabilistic approach in estimating the likelihood of VBPs impacts.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Severine Moune, Roberto Moretti, Arnand Burtin, David Edward Jessop, Tristan Didier, Vincent Robert, Magali Bonifacie, Giancarlo Tamburello, J-Christophe. Komorowski, Patrick Allard, Margaux Buscetti
Summary: Fumarolic gas survey is crucial for detecting potential precursors of violent volcanic eruptions, and the data analysis in this study shows that the compositions and fluxes of fumarolic gas emissions are correlated with the evolution of volcanic activity and other parameters. The study also demonstrates that even under tropical conditions with high humidity and rainfall, multi-gas surveys can distinguish signals of volcanic unrest from secondary changes in degassing.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Michael J. Heap, Claire E. Harnett, Fabian B. Wadsworth, H. Albert Gilg, Lucille Carbillet, Marina Rosas-Carbajal, Jean-Christophe Komorowski, Patrick Baud, Valentin R. Troll, Frances M. Deegan, Eoghan P. Holohan, Roberto Moretti
Summary: The tensile strength of volcanic rocks plays a crucial role in understanding volcanic processes and optimizing energy production in volcanic geothermal reservoirs. This study presents an experimental investigation of the tensile strength of variably altered volcanic rocks, revealing that both porosity and alteration significantly affect the tensile strength. The findings suggest that future modelling should consider the tensile strength of hydrothermally altered volcanic rocks.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
M. Henri, X. Quidelleur, A. Le Friant, J. -C. Komorowski, J. Escartin, C. Deplus, C. Mevel
Summary: This study investigates the age of submarine volcanic systems in the Lesser Antilles volcanic arc using radioisotopic dating. The results reveal the ancient volcanic activity and the formation time of volcanic edifices in the area, providing important insights into the formation of volcanic arcs.
Article
Geosciences, Multidisciplinary
Lise Retailleau, Jean-Marie Saurel, Marine Laporte, Aude Lavayssiere, Valerie Ferrazzini, Weiqiang Zhu, Gregory C. Beroza, Claudio Satriano, Jean-Christophe Komorowski
Summary: The seismic crisis off the coast of Mayotte in 2018 indicated the onset of a volcanic eruption. A network of stations was deployed to monitor the volcanic and tectonic activity in the area. This study re-analyzed seismicity using machine learning, identifying a significant number of events. The focus was on lower frequency long period earthquakes, which are believed to be related to fluid movement at depth.
COMPTES RENDUS GEOSCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Michael J. Heap, Valentin R. Troll, Chris Harris, H. Albert Gilg, Roberto Moretti, Marina Rosas-Carbajal, Jean-Christophe Komorowski, Patrick Baud
Summary: This study explores the use of whole-rock delta O-18 and delta D values and water content as metrics to estimate the strength and stiffness of altered volcanic rocks. It finds that delta O-18 values can be used to estimate these parameters and highlights the advantage of this technique in scenarios with limited material.
BULLETIN OF VOLCANOLOGY
(2022)
