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Tephra segregation profiles based on disdrometer observations and tephra dispersal modeling: Vulcanian eruptions of Sakurajima volcano, Japan [PDF]

Earth, Planets and Space
The profile of tephra concentration along a volcanic plume (i.e., the tephra segregation profile) is an important source parameter for the simulation of tephra transport and deposition and thus for the tephra sedimentation load.
Kosei Takishita, Alexandros-Panagiotis Poulidis, Masato Iguchi   +2 more
doaj   +2 more sources

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
openalex   +3 more sources

Infrasonic precursors to a Vulcanian Eruption at Sakurajima Volcano, Japan [PDF]

Geophysical Research Letters, 1999
The May 1998 eruption sequence of Sakurajima Volcano was monitored by ten infrasonic stations, ten seismometers, and a video camera. During this seismo‐acoustic experiment, we recorded hundreds of infrasonic tremor and long‐period events associated with seismic signals, and observed a progression from relative quiescence to a Vulcanian eruption.
Milton Garcés, M. Iguchi, K. Ishihara, M. Morrissey, Y. Sudo, T. Tsutsui   +5 more
openaire   +2 more sources

Vulcanian eruption mechanisms [PDF]

Nature, 1979
Application of a newly developed theory to volcanological observations of explosive eruptions shows that previous estimates of pre-explosion gas pressures may be overestimated by an order of magnitude.
Self, Stephen, Wilson, Lionel, Nairn, Ian A.   +2 more
openaire   +2 more sources

Isomass and Probability Maps of Ash Fallout Due to Vulcanian Eruptions at Tungurahua Volcano (Ecuador) Deduced from Historical Forecasting [PDF]

Atmosphere, 2020
Since April of 2015, the ash dispersion and ash fallout due to Vulcanian eruptions at Tungurahua, one of the most active volcanoes in Ecuador, have been forecasted daily.
René Parra, Eliana Cadena, Joselyne Paz, Diana Medina   +3 more
doaj   +2 more sources

Vulcanian eruptions at Sakurajima Volcano: geophysical data, numerical modelling, and petrological evidence [PDF]

Bulletin of Volcanology
AbstractWe investigated the magma conduit system beneath three active craters that have repeatedly generated Vulcanian eruptions at Sakurajima Volcano, Japan, by analysing seismic, infrasound, and tilt data. The hypocentres of the earthquakes associated with the Vulcanian eruptions are distributed separately at shallow depths of approximately 0.5 km ...
Takeshi Nishimura, Tomofumi Kozono, Akiko Matsumoto, Mitsuhiro Nakagawa, Masato Iguchi   +4 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, Satoshi Okumura, Yuta Yamanoi   +2 more
openalex   +3 more sources

Modeling Volcanic Eruption Parameters by Near-Source Internal Gravity Waves. [PDF]

Sci Rep, 2016
Volcanic explosions release large amounts of hot gas and ash into the atmosphere to form plumes rising several kilometers above eruptive vents, which can pose serious risk on human health and aviation also at several thousands of kilometers from the ...
Ripepe M, Barfucci G, De Angelis S, Delle Donne D, Lacanna G, Marchetti E.   +5 more
europepmc   +3 more sources

Eruption Source Parameters for forecasting ash dispersion and deposition from vulcanian eruptions at Tungurahua volcano: Insights from field data from the July 2013 eruption

Journal of Volcanology and Geothermal Research, 2016
Tungurahua volcano, located in the central area of the Ecuadorian Sierra, is erupting intermittently since 1999 alternating between periods of quiescence and explosive activity. Volcanic ash has been the most frequent and widespread hazard provoking air contamination episodes and impacts on human health, animals and crops in the surrounding area. After
Parra, R., /Bernard, Benjamin, Narvaez, D., /Le Pennec, Jean-Luc, Hasselle, N., Folch, A.   +5 more
openaire   +4 more sources

Conduit processes of the Sf. Ana (TGS) sub-Plinian-Vulcanian eruption sequence of the Ciomadul volcano (SE Carpathians)

, 2021
The Sf. Ana crater is the young volcanic crater of the dacitic Ciomadul volcano located at the SE end of the Călimani-Gurghiu-Harghita volcanic chain in the Eastern Carpathians. The crater was formed at ~60-30 kyr-s ago probably by several eruptions.
Balázs Kiss, Dávid Karátson, László Előd Aradi, János Szepesi, Tamás Bíró, Tamás Sági, Veronika Szilágyi, Zoltán Kis   +7 more
openalex   +2 more sources