Results 201 to 210 of about 139,835 (226)
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Journal of Volcanology and Geothermal Research, 2012
Abstract Decompression rate of magma at fragmentation (immediately before or after fragmentation) was determined using broken crystals found in the pumices ejected during the vulcanian explosion of Sakurajima volcano, Japan. The combined analysis of textural data obtained from the natural pumice samples and a simple model for the crystal fracturing ...
Takahiro Miwa, Nobuo Geshi
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Abstract Decompression rate of magma at fragmentation (immediately before or after fragmentation) was determined using broken crystals found in the pumices ejected during the vulcanian explosion of Sakurajima volcano, Japan. The combined analysis of textural data obtained from the natural pumice samples and a simple model for the crystal fracturing ...
Takahiro Miwa, Nobuo Geshi
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2018
Astract: Vulcanian eruptions are frequent, small-scale, short-lived explosive volcanic eruptions, which are thought to be produced by impulsive sources. The experiments presented here, produced byinjectionsofmixturesofwater,alcoholorsaltandsolidparticlesintofreshwater,createdawide variety of turbulent flows from steady and impulsive sources.
Clarke, AB, Phillips, JC, Chojnicki, KN
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Astract: Vulcanian eruptions are frequent, small-scale, short-lived explosive volcanic eruptions, which are thought to be produced by impulsive sources. The experiments presented here, produced byinjectionsofmixturesofwater,alcoholorsaltandsolidparticlesintofreshwater,createdawide variety of turbulent flows from steady and impulsive sources.
Clarke, AB, Phillips, JC, Chojnicki, KN
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Pure and Applied Geophysics, 2015
Colima Volcano (19.512°N, 103.617°W, 4000 m.a.s.l.), located on the border between the states of Jalisco and Colima in western Mexico, is the most active volcano in the country. Its activity has taken place through diverse styles of eruption, from very explosive to effusive.
Francisco Javier Núñez-Cornú +3 more
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Colima Volcano (19.512°N, 103.617°W, 4000 m.a.s.l.), located on the border between the states of Jalisco and Colima in western Mexico, is the most active volcano in the country. Its activity has taken place through diverse styles of eruption, from very explosive to effusive.
Francisco Javier Núñez-Cornú +3 more
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Analysis of infrasonic and seismic events related to the 1998 Vulcanian eruption at Sakurajima
Journal of Volcanology and Geothermal Research, 2008Abstract We present results from a detailed analysis of seismic and infrasonic data recorded over a four day period prior to the Vulcanian eruptive event at Sakurajima volcano on May 19, 1998. Nearly one hundred seismic and infrasonic events were recorded on at least one of the nine seismic–infrasonic stations located within 3 km of the crater.
M. Morrissey +3 more
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Journal of Volcanology and Geothermal Research, 1979
Abstract Augustine, an island volcano in Lower Cook Inlet, southern Alaska, erupted in January, 1976, after 12 years of dormancy. By April, when the eruptions ended, a new lava dome had been extruded into the summit crater and about 0.1 km3 of pyroclastics had been deposited on the island, mainly as pyroclastic debris avalanches and pumice flows. The
Juergen Kienle, Glenn E. Shaw
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Abstract Augustine, an island volcano in Lower Cook Inlet, southern Alaska, erupted in January, 1976, after 12 years of dormancy. By April, when the eruptions ended, a new lava dome had been extruded into the summit crater and about 0.1 km3 of pyroclastics had been deposited on the island, mainly as pyroclastic debris avalanches and pumice flows. The
Juergen Kienle, Glenn E. Shaw
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Conduit implosion during Vulcanian eruptions
Geology, 2005Fragmentation experiments and detailed textural studies were performed on Vulcanian pyroclasts of variable porosity from Soufriere Hills volcano, Montserrat. We use textural differences to identify two types of pyroclasts with distinct eruption histories.
B. Kennedy +5 more
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A model of vulcanian eruptions at Galeras volcano, Colombia
Journal of Volcanology and Geothermal Research, 1997Abstract A series of six vulcanian eruptions at Galeras volcano, Colombia, occurred during 1992–1993. These eruptions followed the emplacement of a lava dome in late 1991, which was accompanied by cooling, crystallizing and partial solidification of the column of magma plugging the conduit.
John Stix +6 more
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Pulsed Vulcanian explosions: A characterization of eruption dynamics using Doppler radar
Geology, 2015Understanding the dynamics of ongoing volcanic eruptions is essential for predicting the input and transport of volcanic ash in the atmosphere. To constrain near-vent dynamic processes of explosive Vulcanian events, we used Doppler radar measurements, providing tephra velocities and a proxy of the mass flux, in two field experiments at Volcan de Colima
Scharff, L., Hort, M., Varley, N.
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Energy consumption by magmatic fragmentation and pyroclast ejection during Vulcanian eruptions
Earth and Planetary Science Letters, 2010Abstract Magmatic fragmentation during explosive eruptions consumes a significant amount of energy by the creation of new surface via fracturing. This process reduces the energy that can be imparted to the resulting pyroclasts in the form of kinetic energy.
Miguel A. Alatorre-Ibargüengoitia +4 more
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Journal of Volcanology and Geothermal Research, 2008
In this paper, we document the evolution of the emergent Panarea dome in the Aeolian islands (Southern Italy), placing particular emphasis on the reconstruction of the explosive events that occurred during the final stage of its evolution. Two main pyroclastic successions exposing fall deposits with different compositions have been studied into detail:
C. CIMARELLI +3 more
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In this paper, we document the evolution of the emergent Panarea dome in the Aeolian islands (Southern Italy), placing particular emphasis on the reconstruction of the explosive events that occurred during the final stage of its evolution. Two main pyroclastic successions exposing fall deposits with different compositions have been studied into detail:
C. CIMARELLI +3 more
openaire +1 more source