Results 71 to 80 of about 146,104 (239)

Stratigraphy of Carbonate‐Bearing Rocks at the Margin of Jezero Crater, Mars: Evidence for Shoreline Processes?

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract Martian carbonate‐bearing rocks are compelling targets for exploration because they preserve detailed records of past aqueous processes, climate, and habitability. The Margin unit in Jezero crater is a distinct olivine‐ and carbonate‐bearing unit stratigraphically underlying the western fan, lining the inner margin of the western crater rim ...
Alexander J. Jones, Sanjeev Gupta, Robert Barnes, Briony H. N. Horgan, Kenneth H. Williford, Gerhard Paar, Kathryn. M. Stack, Bradley J. Garzcynski, Eleni Ravanis, Candice C. Bedford, Justin I. Simon, Athanasios Klidaras, Linda C. Kah, James F. Bell, Justin Maki, Stephen W. Lokier, Adrian Brown, Nathan R. Williams, Sanna Alwmark, Jorge I. Núñez, Fred Calef, Larry Crumpler, Alicia Vaughan, Libby R. W. Ives, Sam Gwizd, Ken Farley, Christian Tate, Nicolas Randazzo, Olivier Beyssac, Gwénaël Caravaca   +29 more
wiley   +1 more source

Coeruptive crustal deformation associated with the 2018 Kusatsu-Shirane phreatic eruption based on PALSAR-2 time-series analysis

, 2020
Coeruptive deformation helps to interpret physical processes associated with volcanic eruptions. Because phreatic eruptions cause small, localized coeruptive deformation, we sometimes fail to identify plausible deformation signals.
Y. Himematsu, T. Ozawa, Y. Aoki
semanticscholar   +1 more source

Insights on Hydrothermal‐Magmatic Interactions and Eruptive Processes at Poás Volcano (Costa Rica) From High‐Frequency Gas Monitoring and Drone Measurements

Geophysical Research Letters, 2019
Identification of unambiguous signals of volcanic unrest is crucial in hazard assessment. Processes leading to phreatic and phreatomagmatic eruptions remain poorly understood, inhibiting effective eruption forecasting.
J. M. deMoor, J. Stix, G. Avard, C. Muller, E. Corrales, J. A. Diaz, A. Alan, J. Brenes, J. Pacheco, A. Aiuppa, T. P. Fischer   +10 more
doaj   +1 more source

Persistent Deep Long‐Period Seismicity Near the Lassen Volcanic Center

Geophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract Deep long‐period (DLP) earthquakes have been observed at many volcanic settings around the world and linked to the magmatic processes that drive volcanic unrest. At the Lassen Volcanic Center (LVC) of the Cascade arc, limited detection of DLP activity hinders classification of anomalous seismic behavior and its relationship to the LVC magmatic
Eric Kiser, Kevin Ward, Clinton Koch, Emily Rodriguez, Haiyang Kehoe, Audrey Dunham, Peter Blake   +6 more
wiley   +1 more source

Reconstructing Surface Eruptive Sequence of 2018 Small Phreatic Eruption of Iwo-Yama Volcano, Kirishima Volcanic Complex, Japan by Infrasound Cross-correlation Analysis

, 2020
The Iwo-yama volcano of the Kirishima Volcanic Complex in Japan had a small phreatic eruption in April 2018, which formed multiple vents. The activity was recorded by two infrasound sensors and two monitoring cameras which had been installed within 1 ...
Dan Muramatsu, T. Matsushima, M. Ichihara   +2 more
semanticscholar   +1 more source

Volcanic unrest at Hakone volcano after the 2015 phreatic eruption: reactivation of a ruptured hydrothermal system?

Earth, Planets and Space, 2020
Since the beginning of the twenty-first century, volcanic unrest has occurred every 2–5 years at Hakone volcano. After the 2015 eruption, unrest activity changed significantly in terms of seismicity and geochemistry. Like the pre- and co-eruptive unrest,
K. Mannen, Y. Abe, Yasushi Daita, R. Doke, M. Harada, George Kikugawa, Naoki Honma, Yuji Miyashita, Y. Yukutake   +8 more
semanticscholar   +1 more source

Facies Characterization and Volcanic Source Assignment of Marine Tephra Deposits Around São Miguel Island, Azores Archipelago

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract Long‐term tephrostratigraphies of volcanic islands such as the Azores are often limited to young and incomplete subaerial records. Here, we present a Pleistocene‐Holocene marine tephra archive around the eastern islands of the Azores based on 22 marine gravity cores.
J. C. Schindlbeck‐Belo, M. Andrade, J. Kling, S. Kutterolf, A. Pimentel, E. Lebas, A. Freundt, K. Pank, T. H. Hansteen   +8 more
wiley   +1 more source

Modeling the priming mechanisms of phreatic eruptions: challenges and possible solutions

, 2023
To the present date, no phreatic eruption has been successfully forecasted, as this kind of eruption lacks clear and univocal precursory signals. Understanding how deep magmatic gas and heat fluxes interact with groundwater systems and prime phreatic eruptions is thus of pivotal importance.
Stocchi, M., Costa, A., Sulpizio, R., Folch, A., Houzeaux, G.   +4 more
openaire   +3 more sources

Fluid-mineral dynamics at the Rincón de la Vieja volcano—hydrothermal system (Costa Rica) inferred by the study of major, minor and rare earth elements in the hyperacid crater lake

Frontiers in Earth Science, 2023
Volcanic lakes are complex natural systems and their chemical composition is related to a myriad of processes. The chemical composition of major, minor, Rare Earth Elements (REE) and physico-chemical parameters at the hyperacid crater lake of Rincón de ...
Sabrina Pappaterra, Claudio Inguaggiato, Claudio Inguaggiato, Dmitri Rouwet, Gilles Levresse, Loic Peiffer, Loic Peiffer, Carmine Apollaro, Raúl Mora-Amador, Carlos Ramírez-Umaña, Gino González, Gino González, Gino González, Benedetto Schiavo, Thomas Gunter Kretzschmar, Lorenzo Brusca   +15 more
doaj   +1 more source

Magmatic Volatile Flux Drives Non‐Eruptive Volcano‐Tectonic Seismicity at Mount St. Helens, USA From 2008–2024

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract Seismicity during non‐eruptive periods is useful for observing stress changes related to magmatic transport and volatile exsolution within active volcanoes. Mount St. Helens in Washington, USA, is the most active volcano in the continental United States and has been in quiescence since 2008. To explore the processes driving seismicity at Mount
Brenton W. Hirao, Amanda M. Thomas, David R. Shelly, Weston A. Thelen, Cyril Journeau   +4 more
wiley   +1 more source