Results 161 to 170 of about 498 (196)

Experimental simulation of phase mingling in a subaqueous lava fountain

Journal of Geophysical Research: Solid Earth, 2006
Experimental simulations were carried out to determine hydrodynamic flow structures and phase mingling mechanisms of a completely submerged shallow water volcanic vent with the objective of understanding how flow conditions ultimately affect the character and explosiveness of hydromagmatic eruptions.
Peter D. Friedman, William J. Meyer, Steven Carey   +2 more
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Galileo Catches Lava Fountain on Io

Science, 1999
SAN FRANCISCO-- Astronomers are galvanized by a new image of what may be a curtain of lava spewing above a volcano on Jupiter9s moon Io. The picture, snapped by the Galileo spacecraft during its daredevil dive past Io on Thanksgiving and released last week at a meeting of the American Geophysical Union, also reveals a complex, jagged cliff arcing ...
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How topographic changes influenced infrasound amplitude during Mt. Etna’s 2021 lava fountains

2023
Over the last 20 years, infrasound signals have been used to investigate and monitor active volcanoes during eruptive and degassing activity. In particular, infrasound amplitude information has been used to estimate eruptive parameters such as plume height, magma discharge rate and lava fountain height.
Iozzia A., Watson L. M., Cantarero M., De Beni E., Di Grazia G., Ganci G., Johnson J. B., Privitera E., Proietti C., Sciotto M., Cannata A.   +10 more
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Emplacement history of a low-viscosity, fountain-fed pantelleritic lava flow

Journal of Volcanology and Geothermal Research, 1993
Abstract The strongly peralkaline 8-ka flow, Mayor Island, New Zealand, was emplaced as a low-viscosity fountain-fed lava flow. The flow stratigraphy comprises from top to base: a finely vesicular pumiceous carapace: an upper obsidian layer; central crystalline rhyolite; a lower obsidian layer incorporating a crumble breccia; above a fall lapilli ...
Richard J. Stevenson, Roger M. Briggs, A.Peter W. Hodder   +2 more
openaire   +1 more source

A New GNSS-Based Approach for Volcanic Crater Location During Lava Fountains

IEEE Geoscience and Remote Sensing Letters, 2019
Recent studies have focused on the capability of the global navigation satellite system (GNSS) instruments to detect volcanic plumes by means of either variation in signal-to-noise ratio or products from positioning processing. These new approaches can be extremely useful for volcanoes worldwide, which may not have advanced monitoring systems or during
Flavio Cannavo, Massimo Aranzulla, Simona Scollo, Giuseppe Puglisi   +3 more
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Lava discharge during Etna's January 2011 fire fountain tracked using MSG-SEVIRI

Bulletin of Volcanology, 2011
Etna's January 2011 eruption provided an excellent opportunity to test the ability of Meteosat Second Generation satellite's Spinning Enhanced Visible and InfraRed Imager (SEVIRI) sensor to track a short-lived effusive event. The presence of lava fountaining, the rapid expansion of lava flows, and the complexity of the resulting flow field make such ...
Gouhier, Mathieu, Harris, Andrew, Calvari, Sonia, Labazuy, Philippe, Guéhenneux, Yannick, Donnadieu, Franck, Valade, Sébastien   +6 more
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The chemistry of sublimates collected directly from lava fountains at Kilauea Volcano, Hawaii

Geochimica et Cosmochimica Acta, 1974
Abstract During 1970, it was occasionally feasible to collect sublimate from directly above the lava fountain in the crater of Mauna Ulu on the east rift zone of Kilauea Volcano, when the level of the lava pool had dropped within the crater. Collecting equipment was suspended down the steep wall to a position above the fountain. Collections were made
John J. Naughton, Virginia A. Lewis, Dale Hammond, Daniel Nishimoto   +3 more
openaire   +1 more source

Crater Rim Collapses Affect the Lava Fountaining Frequency during the Fagradalsfjall Eruption, Iceland 2021

2022
<p>The Fagradalsfjall eruption on the Reykjanes peninsula, Iceland, lasted from 19 March to 18 September 2021. While it continuously effused lava at the beginning, it opened up 7 further vents in April and focused the activity from late April on Vent 5.
Eva P. S. Eibl, Thorvaldur Thórðarson, Ármann Höskuldsson, Egill Á. Gudnason, Thoralf Dietrich, Gylfi Páll Hersir, Thorbjörg Ágústsdóttir   +6 more
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Clinopyroxene and titanomagnetite cation redistributions at Mt. Etna volcano (Sicily, Italy): Footprints of the final solidification history of lava fountains and lava flows

Chemical Geology, 2015
Abstract For a better understanding of the final solidification history of eruptions at Mt. Etna volcano (Sicily, Italy), we have investigated cation redistributions at the interface between sub-millimetre-sized clinopyroxene and titanomagnetite crystal rims and coexisting melts.
Mollo, S, GIACOMONI, Pier Paolo, Andronico, D, Scarlato, P.   +3 more
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Unexpected hazards from tephra fallouts at Mt Etna: The 23 November 2013 lava fountain

Journal of Volcanology and Geothermal Research, 2015
Abstract Hundreds of paroxysmal episodes and a few long-lasting ash-emissions eruptions make Mt. Etna, in Italy, one of the most productive basaltic volcanoes in the world over recent years. This frequent explosive activity certainly gives volcanologists plenty of stimulating scientific material for study.
Daniele Andronico, Simona Scollo, Antonio Cristaldi   +2 more
openaire   +1 more source