Results 31 to 40 of about 146,104 (239)

Behavior of magmatic components in fumarolic gases related to the 2018 phreatic eruption at Ebinokogen Ioyama volcano, Kirishima Volcanic Group, Kyushu, Japan

Earth, Planets and Space, 2021
Direct sampling and analysis of fumarolic gas was conducted at Ebinokogen Ioyama volcano, Japan, between December 2015 and July 2020. Notable changes in the chemical composition of gases related to volcanic activity included a sharp increase in SO 2 and ...
T. Ohba, Muga Yaguchi, U. Tsunogai, Masanori Ito, Ryo Shingubara   +4 more
semanticscholar   +1 more source

The hydrothermal system prior to a phreatic eruption: The case of the 1873 eruption at La Fossa (Vulcano Island, Italy)

Journal of Volcanology and Geothermal Research
Silvia Giansante, P. Fulignati, A. Gioncada, M. Pistolesi, T. E. Ongaro, Antonio Tazzini, R. Cioni   +6 more
semanticscholar   +2 more sources

Observations of Hydrothermal System and Preparatory Process of Phreatic Eruption: Recent Developments and Future Prospects

Journal of Geography (Chigaku Zasshi), 2021
A phreatic eruption is a phenomenon in which water near the surface expands rapidly due to magma-supplied heat, ejecting the surrounding rocks. Recent studies of conceptual models, subsurface structures, pre-eruption processes, and eruption processes of ...
Y. Yukutake, K. Mannen
semanticscholar   +1 more source

Raman microspectroscopic study of reference clay minerals and alteration minerals in volcanic ejecta from the 7 March 2012 phreatic eruption on Ioto Island (Iwo-jima), Izu-Bonin arc, Japan

, 2021
We used micro-Raman spectroscopy to analyze volcanic ejecta from the 7 March 2012 phreatic eruption at Old Crater (Million Dollar Hole) on Ioto Island, Izu-Bonin arc, Japan, to assess the ability of this technique to identify clay and other alteration ...
K. Ikehata, Y. Arakawa, J. Ishibashi
semanticscholar   +1 more source

Phreatic eruptions at crater lakes: occurrence statistics and probabilistic hazard forecast [PDF]

Journal of Applied Volcanology, 2017
Phreatic eruptions, although posing a serious threat to people in crater proximity, are often underestimated and have been comparatively understudied. The detailed eruption catalogue for Ruapehu Volcano (New Zealand) provides an exceptional opportunity to study the statistics of recurring phreatic explosions at a crater lake volcano.
Karen Strehlow, Laura Sandri, Joachim H. Gottsmann, Geoff Kilgour, Alison C. Rust, Roberto Tonini   +5 more
openaire   +5 more sources

Phreatic and Hydrothermal Eruptions: From Overlooked to Looking Over

Bulletin of Volcanology, 2022
AbstractOver the last decade, field investigations, laboratory experiments, geophysical exploration and petrological, geochemical and numerical modelling have provided insight into the mechanisms of phreatic and hydrothermal eruptions. These eruptions are driven by sudden flashing of ground- or hydrothermal water to steam and are strongly influenced by
Cristian Montanaro, Emily Mick, Jessica Salas-Navarro, Corentin Caudron, Shane J. Cronin, J. Maarten de Moor, Bettina Scheu, John Stix, Karen Strehlow   +8 more
openaire   +1 more source

Statistical analysis of the distribution of phreatic eruption products in the caldera of the Golovnin volcano (Kunashir Island, Kuril Islands)

Geosystems of Transition Zones, 2021
The paper presents the results of statistical processing of data on the thickness and size of the tephra fragments of andesidacite composition erupted as a result of a phreatic explosion in the caldera of Golovnin volcano about 1000 years ago.
О. В. Веселов, A. Kazakov, O. Veselov, D. Kozlov   +3 more
semanticscholar   +1 more source

Monitoring SO2 emission at the Soufriere Hills Volcano: implications for changes in erruptive conditions [PDF]

, 1998
FLWINinfo:eu-repo/semantics ...
A. J. H. Maciejewski, Allen, B. Darroux, Barclay, C. A. Gardner, C. M. M. Oppenheimer, Daag, Devine, G. E. Norton, Gerlach, Gerlach, Hammouya, Hirabayashi, I. M. Watson, J. Barclay, J. Stix, Luhr, M. A. Davies, Millán, Millán, Neuberg, Oppenheimer, P. Delmelle, P. W. Francis, Robertson, S. R. Young, Seigneur, Sparks, Stoiber, T. J. Casadevall, Wallace, Young   +31 more
core   +1 more source

Maars to calderas. End-members on a spectrum of explosive volcanic depressions [PDF]

, 2015
We discuss maar-diatremes and calderas as end-members on a spectrum of negative volcanic landforms (depressions) produced by explosive eruptions (note—we focus on calderas formed during explosive eruptions, recognizing that some caldera types are not ...
Palladino, Danilo Mauro, Sottili, Gianluca, Taddeucci, J., Valentine, G. A.   +3 more
core   +1 more source

Shallow hydrothermal reservoir inferred from post-eruptive deflation at Ontake Volcano as revealed by PALSAR-2 InSAR

Earth, Planets and Space, 2018
In 2014, a phreatic eruption occurred at the Ontake Volcano in Central Japan causing multiple deaths and missing persons. Interferometric Synthetic Aperture Radar data showed local-scale subsidence around the newly created eruptive vents after the ...
Shohei Narita, Makoto Murakami
doaj   +1 more source