Results 61 to 70 of about 2,674 (211)

Aeromagnetic survey in Kusatsu-Shirane volcano, central Japan, by using an unmanned helicopter

Earth, Planets and Space, 2021
Kusatsu-Shirane volcano is one of the active volcanoes in Japan. Phreatic explosions occurred in Mt. Shirane in 1983 and most recently, in 2018, in Mt. Motoshirane.
Takao Koyama, Wataru Kanda, Mitsuru Utsugi, Takayuki Kaneko, Takao Ohminato, Atsushi Watanabe, Hiroshi Tsuji, Taro Nishimoto, Alexey Kuvshinov, Yoshiaki Honda   +9 more
doaj   +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

Eruption style transition during the 2017–2018 eruptive activity at the Shinmoedake volcano, Kirishima, Japan: surface phenomena and eruptive products

Earth, Planets and Space, 2023
Recent eruptions of the Shinmoedake volcano, Japan, have provided a valuable opportunity to investigate the transition between explosive and effusive eruptions. In October 2017, phreatic/phreatomagmatic explosions occurred.
Fukashi Maeno, Sayaka Shohata, Yuki Suzuki, Natsumi Hokanishi, Atsushi Yasuda, Yuya Ikenaga, Takayuki Kaneko, Setsuya Nakada   +7 more
doaj   +1 more source

Evidence for a new shallow magma intrusion at La Soufrière of Guadeloupe (Lesser Antilles). Insights from long-term geochemical monitoring of halogen- rich hydrothermal fluids [PDF]

, 2014
International audienceMore than three decades of geochemical monitoring of hot springs and fumaroles of La Soufrière of Guadeloupe allows the construction of a working model of the shallow hydrothermal system.
Beauducel, François, Crispi, Olivier, de Chabalier, Jean-Bernard, Dessert, Celine, Hammouya, Gilbert, Komorowski, Jean-Christophe, Michel, Agnès, Villemant, Benoît   +7 more
core   +4 more sources

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

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

Rootless cones on Mars indicating the presence of shallow equatorial ground ice in recent times [PDF]

, 2001
High resolution Mars Orbiter Camera (MOC) images have revealed the existence of clusters of small cones in the Cerberus plains, Marte Valles, and Amazonis Planitia, Mars.
Alfred S. McEwen, Burr, Carr, Chapman, Clifford, Fagents, Frey, Hartmann, Hartmann, Hoffman, Keszthelyi, Keszthelyi, Laszlo P. Keszthelyi, Lowry, Mellon, Mouginis-Mark, Peter D. Lanagan, Plescia, Tanaka, Tanaka, Thorarinsson, Thordarson, Thordarson, Thorvaldur Thordarson   +23 more
core   +1 more source

Satellite Geodesy Reveals Shallow, Transient Magma Intrusions at Sotará Volcano, Colombia

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract Sotará is a little‐known andesitic‐dacitic stratovolcano in southwestern Colombia. Although there are no recorded historical eruptions, the volcano shows clear evidence of geothermal activity, deformation, and volcano‐tectonic seismicity. Its remote location and rugged terrain pose challenges for access and routine monitoring.
Rosa Alpala, Jorge Alpala, Patricia A. Rosell, Leonardo D. Euillades, Pablo A. Euillades, Maurizio Battaglia   +5 more
wiley   +1 more source

Accurate hindcasting of explosive eruptions at Whakaari, New Zealand

Volcanica
Phreatic eruptions are small, sudden events, commonly with few precursory signals. They are driven by interactions between magmatic and hydrothermal processes at shallow levels beneath the surface.
John Stix, Craig Miller, Yajing Liu
doaj   +1 more source

Laboratory studies of volcanic jets [PDF]

, 1984
The study of the fluid dynamics of violent volcanic eruptions by laboratory experiment is described, and the important fluid-dynamic processes that can be examined in laboratory models are discussed in detail.
Kieffer, Susan Werner, Sturtevant, Bradford   +1 more
core   +2 more sources