Results 21 to 30 of about 331 (165)

Physical parameterization of Strombolian eruptions via experimentally‐validated modeling of high‐speed observations [PDF]

Geophysical Research Letters, 2012
Pressurized gas drives explosive volcanic eruptions. Existing models can predict the amount and pressure of gas in erupting magma, but application and testing of such models is currently limited by the accuracy of input parameters from natural systems.
J. Taddeucci, M. A. Alatorre Ibarguengoitia, MORONI, Monica, L. Tornetta, A. Capponi, P. Scarlato, D. B. Dingwell, D. De Rita   +7 more
openaire   +3 more sources

Gas flow dynamics in the conduit of Strombolian explosions inferred from seismo-acoustic observations at Aso volcano, Japan

Earth, Planets and Space, 2019
Strombolian explosions are one of the most studied eruptive styles and are characterized by intermittent explosions. The mechanism of a Strombolian explosion is modeled as a large gas pocket (slug) migrating through the magma conduit and then bursting at
Kyoka Ishii, Akihiko Yokoo, Tsuneomi Kagiyama, Takahiro Ohkura, Shin Yoshikawa, Hiroyuki Inoue   +5 more
doaj   +1 more source

Volcanic ballistic projectile deposition from a continuously erupting volcano: Yasur Volcano, Vanuatu

Volcanica, 2020
Volcanic ballistics are the main hazard to life and infrastructure from Strombolian eruptions, which are a tourist drawcard, exposing people to this hazard.
Rebecca Hanna Fitzgerald, Ben M Kennedy, Christopher Gomez, Thomas M Wilson, Benjamin Simons, Graham S Leonard, Robin S Matoza, Arthur D Jolly, Esline Garaebiti   +8 more
doaj   +1 more source

A 36,000-Year-Old Volcanic Eruption Depicted in the Chauvet-Pont d'Arc Cave (Ardèche, France)? [PDF]

PLoS ONE, 2016
Among the paintings and engravings found in the Chauvet-Pont d'Arc cave (Ardèche, France), several peculiar spray-shape signs have been previously described in the Megaloceros Gallery.
Sébastien Nomade, Dominique Genty, Romain Sasco, Vincent Scao, Valérie Féruglio, Dominique Baffier, Hervé Guillou, Camille Bourdier, Hélène Valladas, Edouard Reigner, Evelyne Debard, Jean-François Pastre, Jean-Michel Geneste   +12 more
doaj   +1 more source

Plate tephra: Preserved bubble walls from large slug bursts during violent Strombolian eruptions [PDF]

Geology, 2014
We describe unusual "plate tephra" particles that provide key information about rarely observed processes that occur during volcanic eruptions. The tephra formed during the 2008-2009 eruption of Llaima volcano, Chile, and dispersed as far as 9 km from the vent.
Ruth, Dawn, Calder, Eliza
openaire   +2 more sources

Seismo-volcanic sources on Stromboli volcano

Annals of Geophysics, 1996
A detailed analysis of broadband seismic recordings leads to models of eruption mechanisms for Strombolian activity. The data used comprise signals from arrays of nine three-component seismometers and video recordings of visual eruptive activity with ...
R. Luckett, J. Neuberg
doaj   +1 more source

High‐speed imaging of Strombolian eruptions: Gas‐pyroclast dynamics in initial volcanic jets [PDF]

Geophysical Research Letters, 2015
AbstractHigh‐speed imaging of Strombolian explosions brings into view the motion of pyroclasts upon leaving the volcanic vent. The erupted gas‐pyroclast mixtures form jets with well‐defined leading vortex rings that rise at almost constant velocity proportional to the time‐averaged velocity of pyroclasts.
Taddeucci, J., Alatorre Ibarguengoitia, M. A., PALLADINO, Danilo Mauro, Scarlato, P., Camaldo, C.   +4 more
openaire   +2 more sources

Variation of volcanic gas composition during the eruptive period in 2014–2015 at Nakadake crater, Aso volcano, Japan

Earth, Planets and Space, 2018
Volcanic gas composition measurement by Multi-GAS was repeated during the eruptive period in 2014–2015 as well as the quiet period preceding the eruption at Nakadake crater, Aso volcano.
Hiroshi Shinohara, Akihiko Yokoo, Ryunosuke Kazahaya   +2 more
doaj   +1 more source

The Volcanic Hazards of Jan Mayen Island (North-Atlantic)

Frontiers in Earth Science, 2022
Hazard assessment of remote volcanic islands provides many challenges compared to other volcanoes and volcanic fields. Here we present the first systematic volcanic hazard assessment of Jan Mayen Island, a remote island located in the North-Atlantic ...
Eirik Gjerløw, Eirik Gjerløw, Ármann Höskuldsson, Stefania Bartolini, Sebastien Biass, Sophie Mossoux, Jennie Gilbert, Rolf Birger Pedersen, Joan Martí   +8 more
doaj   +1 more source

Forecasting and communicating the dispersion and fallout of ash during volcanic eruptions: lessons from the September 20, 2020 eruptive pulse at Sangay volcano, Ecuador

Frontiers in Earth Science, 2022
Volcanic ash is a hazard to human health and activities. Accurate and timely forecasts coupled with effective communication about the dispersion and fallout of volcanic ash during explosive events are essential to reduce impacts on local communities and ...
Benjamin Bernard, Pablo Samaniego, Larry Mastin, Stephen Hernandez, Gerardo Pino, Jamie Kibler, Marjorie Encalada, Silvana Hidalgo, Nicole Vizuete   +8 more
doaj   +1 more source