Results 11 to 20 of about 2,078 (215)
Vulcanian eruptions with dominant single force components observed during the Asama 2004 volcanic activity in Japan [PDF]
Earth, Planets and Space, 2006 AbstractOn September 1, 2004, Mt. Asama in central Japan erupted for the first time in 21 years. Between this moderate eruption and mid-November of the same year, 4 additional moderate eruptions occurred. We installed 8 broadband seismic stations in addition to the short period seismic network around the volcano and succeeded in recording the near ...
Etsuro Koyama +7 more
core +6 more sources
Journal of Geophysical Research: Solid EarthAbstractSabancaya volcano (Peru), is a stratovolcano in the Central Volcanic Zone of the Andes. Since November 2016, it has been in constant activity, marked by daily multiple Vulcanian explosions. In this contribution, we first characterize the plumes generated by the explosions using visible‐ and infrared‐wavelength imagery, describing plume ...
Riccardo Simionato +6 more
wiley +3 more sources
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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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 +4 more sources
Understanding and forecasting phreatic eruptions driven by magmatic degassing [PDF]
Earth, Planets and Space, 2018 This paper examines phreatic eruptions which are driven by inputs of magma and magmatic gas. We synthesize data from several significant phreatic systems, including two in Costa Rica (Turrialba and Poás) which are currently highly active and hazardous ...
John Stix, J. Maarten de Moor
doaj +2 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 +5 more
openalex +4 more sources
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
openalex +4 more sources
Swelling of a lava plug associated with a Vulcanian eruption at Sakurajima Volcano, Japan, as revealed by infrasound record: case study of the eruption on January 2, 2007 [PDF]
Bulletin of Volcanology, 2008 In order to clarify the time relation of the expansion of a gas pocket and failure of its overlying plug of lava during Vulcanian eruptions, infrasound records and video images of the Vulcanian eruption that occurred at Sakurajima volcano on January 2, 2007 were analyzed with respect to their origin times.
Akihiko Yokoo +2 more
openalex +2 more sources
Molecular-Dynamics Simulation of Vulcanian Eruption
, 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
openalex +7 more sources