Results 11 to 20 of about 331 (178)
Mechanism of the historical and the ongoing Vulcanian eruptions of Ebeko volcano, Northern Kuriles. [PDF]
Bull Volcanol, 2021 Ebeko is one of the most active volcanoes of the Kurile island arc, producing frequent mild Vulcanian explosions with eruption clouds up to 5 km high. The volcano poses a serious threat to the Severo-Kurilsk town with a population of around 2500 inhabitants, located at a distance of only 7 km on a fan of the volcano's laharic deposits.
Belousov A +4 more
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The summer 2019 basaltic Vulcanian eruptions (paroxysms) of Stromboli [PDF]
Bulletin of Volcanology, 2020 AbstractStromboli is an active, open conduit mafic volcano, whose persistent mild Strombolian activity is occasionally punctuated by much stronger explosions, known as paroxysms. During summer 2019, the volcano unexpectedly produced one such paroxysm on July 3, followed by intense explosive and intermittent effusive activity culminating in a second ...
Guido Giordano, G. De Astis
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Sedimentation process of ashfall during a Vulcanian eruption as revealed by high-temporal-resolution grain size analysis and high-speed camera imaging [PDF]
Progress in Earth and Planetary Science, 2020 We here examined the sedimentation process of falling ash particles during a short-lived Vulcanian eruption at Sakurajima volcano, Japan, using high-speed camera imaging of airborne ash particles, as well as grain size analyses of ash samples collected ...
T. Miwa +3 more
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Rheological change and degassing during a trachytic Vulcanian eruption at Kilian Volcano, Chaîne des Puys, France [PDF]
Bulletin of Volcanology, 2020 AbstractMagma ascent during silicic dome-forming eruptions is characterized by significant changes in magma viscosity, permeability, and gas overpressure in the conduit. These changes depend on a set of parameters such as ascent rate, outgassing and crystallization efficiency, and magma viscosity, which in turn may influence the prevailing conditions ...
Mathieu Colombier +10 more
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Vulcanian eruption processes inferred from volcanic glow analysis at Sakurajima volcano, Japan [PDF]
Bulletin of Volcanology, 2023 AbstractVolcanic glow, which is often observed at active craters during nighttime, contains information on high-temperature zones deep in the crater that are hidden from view. We analyzed 90 eruption videos capturing volcanic glow before the onset of Vulcanian eruptions at the Showa crater of Sakurajima volcano (Japan), and found that they show clear ...
Dan Muramatsu +4 more
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Remote Sensing, 2020 Vulcanian explosions are hazardous and are often spontaneous and direct observations are therefore challenging. Ebeko is an active volcano on Paramushir Island, northern Kuril Islands, showing characteristic Vulcanian-type activity. In 2019, we started a
Thomas R. Walter +4 more
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A mathematical model of vulcanian eruptions [PDF]
Geophysical Journal International, 1990 SUMMARY The problem of an expansion wave propagating into a saturated magma is solved and used as a model of a vulcanian eruption. In our model for an explosive eruption we assume that a drop in pressure leads to the exsolution of magmatic volatiles. Initially the exsolved vapours create bubbles in the magma.
Donald L. Turcotte +3 more
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Molecular-Dynamics Simulation of Vulcanian Eruption [PDF]
, 2005 Vulcanian explosive eruption, which is a nonlinear and nonequilibrium abrupt dynamics of magma-gas mixture, is modeled by a two-component Lennard-Jones particle system. Molecular-dynamics simulation of a shock-tube experiment gives consistent results with a explosive eruption picture of volcanology; Shock wave and expansion wave are reproduced.
Satoshi Yukawa, Nobuyasu Ito
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Conduit processes during the February 11, 2010 Vulcanian eruption of Soufrière Hills, Montserrat
Journal of Volcanology and Geothermal Research, 2019 Abstract We analyzed pumice from the February 11, 2010 Vulcanian explosion that immediately followed a large dome collapse at Soufriere Hills volcano. We obtained pre-explosive values of porosity, pressure, and depth by combining textural analyses and glass water content determinations.
Alain Burgisser +5 more
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Pressurization processes of magmas in a shallow conduit to cause vulcanian eruption
Japanese Magazine of Mineralogical and Petrological Sciences, 2006 Vulcanian eruptions are relatively frequent eruptive phenomena in island arc volcanism. The high frequency provides us many opportunities to observe the eruptive behavior and to sample the erupted materials. Vulcanian activity of the Sakurajima volcano located at southern Kyushu in Japan has continued since 1955 and been precisely monitored by ...
Shingo Takeuchi +2 more
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