Results 191 to 200 of about 2,078 (215)
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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
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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.
Carlos Suárez-Plascencia +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.
Carlos Suárez-Plascencia +3 more
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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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Journal of Volcanology and Geothermal Research, 2013
Abstract We discuss the process of vulcanian eruptions on the basis of temporal variation of the texture of andesitic volcanic ash ejected from the Sakurajima volcano, Japan. Falling ash samples were collected every 2–50 min for petrological analysis.
Takahiro Miwa +2 more
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Abstract We discuss the process of vulcanian eruptions on the basis of temporal variation of the texture of andesitic volcanic ash ejected from the Sakurajima volcano, Japan. Falling ash samples were collected every 2–50 min for petrological analysis.
Takahiro Miwa +2 more
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Journal of Volcanology and Geothermal Research, 2016
Abstract We examine the initial phases of explosion earthquakes accompanying Vulcanian eruptions at Lokon-Empung volcano in Indonesia to reveal the triggering process of explosive eruptions. In 2012–2013, 56 Vulcanian eruptions at Lokon-Empung were observed by our temporary observation network being comprised of four broadband seismometers and two ...
Taishi Yamada +8 more
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Abstract We examine the initial phases of explosion earthquakes accompanying Vulcanian eruptions at Lokon-Empung volcano in Indonesia to reveal the triggering process of explosive eruptions. In 2012–2013, 56 Vulcanian eruptions at Lokon-Empung were observed by our temporary observation network being comprised of four broadband seismometers and two ...
Taishi Yamada +8 more
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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 ...
Nobuo Geshi, Takahiro Miwa
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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 ...
Nobuo Geshi, Takahiro Miwa
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Journal of Volcanology and Geothermal Research, 2009
Abstract We compare the texture of volcanic ash with the maximum amplitude of explosion earthquakes ( A eq ) for vulcanian eruptions from Sakurajima volcano. We analyze the volcanic ash emitted by 17 vulcanian eruptions from 1974 to 1987. Using a stereoscopic microscope, we classify the glassy particles into smooth surface particles (S-type ...
Atsushi Toramaru +2 more
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Abstract We compare the texture of volcanic ash with the maximum amplitude of explosion earthquakes ( A eq ) for vulcanian eruptions from Sakurajima volcano. We analyze the volcanic ash emitted by 17 vulcanian eruptions from 1974 to 1987. Using a stereoscopic microscope, we classify the glassy particles into smooth surface particles (S-type ...
Atsushi Toramaru +2 more
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Bulletin of Volcanology, 2017
The study of ~1300 juvenile and lithic blocks from a Vulcanian phase of the 1912 eruption of Novarupta provides new insight into the state of the magma as an eruption passes from sustained Plinian to dome growth. Blocks that were predominantly ballistically ejected were measured and sampled within an ~2–3-km radius from vent and supply a picture of a ...
Isgett, S. +5 more
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The study of ~1300 juvenile and lithic blocks from a Vulcanian phase of the 1912 eruption of Novarupta provides new insight into the state of the magma as an eruption passes from sustained Plinian to dome growth. Blocks that were predominantly ballistically ejected were measured and sampled within an ~2–3-km radius from vent and supply a picture of a ...
Isgett, S. +5 more
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Bulletin of Volcanology, 2012
We examine the basic characteristics of inflations at Semeru Volcano, Indonesia, to clarify the pressurization process prior to two different styles of explosive eruptions: Vulcanian eruptions and gas bursts. Analysis of data obtained from tilt meters installed close to the active crater allows clarification of the common features and the differences ...
Takeshi Nishimura +5 more
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We examine the basic characteristics of inflations at Semeru Volcano, Indonesia, to clarify the pressurization process prior to two different styles of explosive eruptions: Vulcanian eruptions and gas bursts. Analysis of data obtained from tilt meters installed close to the active crater allows clarification of the common features and the differences ...
Takeshi Nishimura +5 more
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Journal of Geophysical Research: Solid Earth, 2013
AbstractThe dynamics of explosive eruptions, such as Plinian, sub‐Plinian, Vulcanian, and Strombolian ones, is one of the most fascinating subjects in volcano physics. During the early period of volcanic activity at the Shinmoe‐dake Volcano in 2011, various kinds of activities, such as sub‐Plinian eruptions, a magma effusion, and Vulcanian eruptions ...
Takao Ohminato +5 more
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AbstractThe dynamics of explosive eruptions, such as Plinian, sub‐Plinian, Vulcanian, and Strombolian ones, is one of the most fascinating subjects in volcano physics. During the early period of volcanic activity at the Shinmoe‐dake Volcano in 2011, various kinds of activities, such as sub‐Plinian eruptions, a magma effusion, and Vulcanian eruptions ...
Takao Ohminato +5 more
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