Results 61 to 70 of about 139,835 (226)

Quantitative textural analysis of Vulcanian pyroclasts (Montserrat) using multi-scale X-ray computed microtomography: comparison with results from 2D image analysis [PDF]

, 2011
International audienceX-ray computed microtomography (μCT) was carried out on four pyroclasts from the 1997 Vulcanian explosions of Soufrière Hills Volcano, Montserrat. Three-dimensional data from multiple image stacks with different spatial resolutions (
Arbaret, Laurent, Burgisser, Alain, Druitt, Timothy H., Giachetti, Thomas, Kelfoun, Karim   +4 more
core   +3 more sources

Unsteady high-pressure flow experiments with applications to explosive volcanic eruptions [PDF]

, 2010
Motivated by the hypothesis that volcanic blasts can have supersonic regions, we investigate the role of unsteady flow in jets from a high-pressure finite reservoir.
Austin, J. M., Kieffer, S. W., Orescanin, M. M.   +2 more
core   +1 more source

Probabilistic volcanic hazard assessment at an active but under-monitored volcano: Ceboruco, Mexico

Journal of Applied Volcanology, 2022
A probabilistic volcanic hazard assessment (PVHA) for Ceboruco volcano (Mexico) is reported using PyBetVH, an e-tool based on the Bayesian Event Tree (BET) methodology. Like many volcanoes, Ceboruco is under-monitored.
Robert Constantinescu, Karime González-Zuccolotto, Dolors Ferrés, Katrin Sieron, Claus Siebe, Charles Connor, Lucia Capra, Roberto Tonini   +7 more
doaj   +1 more source

Identification of structural controls in an active lava dome with high resolution DEMs:Volcán de Colima, Mexico [PDF]

, 2012
Monitoring the topography of active lava domes is critical for detecting changes that may trigger or influence collapse or explosive activity. Internal dome structure and conditions are more difficult to elucidate, but also play vital roles.
James, Michael, Varley, Nick
core   +1 more source

SO2 and tephra emissions during the December 22, 2018 Anak Krakatau eruption

Volcanica, 2019
On December 22, 2018 the south-western flank of Anak Krakatau collapsed into the sea, removing 93.8 × 106 m3 of subaerial lavas, and generated a tsunami.
Mathieu Gouhier, Raphaël Paris
doaj   +1 more source

Characterization of moderate ash-and-gas explosions at Santiaguito volcano, Guatemala, from infrasound waveform inversion and thermal infrared measurements [PDF]

, 2016
The rapid discharge of gas and rock fragments during volcanic eruptions generates acoustic infrasound. Here we present results from the inversion of infrasound signals associated with small and moderate gas‐and‐ash explosions at Santiaguito volcano ...
A. J. Hornby, A. Lamur, A. Rietbrock, Bennett, Bluth, Caplan-Auerbach, Cerminara, Delle Donne, F. W. von Aulock, Fee, G. Chigna, Garcés, Johnson, Johnson, Johnson, Johnson, Johnson, Kim, Kim, Lacanna, Lamb, Lavallée, Marchetti, Matoza, O. D. Lamb, Patrick, Ripepe, Rossing, S. De Angelis, Valade, Vergniolle, von Aulock, Y. Lavallée, Yamamoto   +33 more
core   +1 more source

Volatile emissions from past eruptions at La Soufrière de Guadeloupe (Lesser Antilles): insights into degassing processes and atmospheric impacts

Frontiers in Earth Science, 2023
Volatiles exert a critical control on volcanic eruption style and in turn impact the near source environment and global climate. La Soufrière de Guadeloupe in the Lesser Antilles has been experiencing volcanic unrest since 1992, increasing to a peak in ...
Abigail Metcalfe, Séverine Moune, Séverine Moune, Séverine Moune, Roberto Moretti, Roberto Moretti, Jean-Christophe Komorowski, Thomas J. Aubry   +7 more
doaj   +1 more source

Paleomagnetism and paleomagnetic dating to large volcanic bombs: an example from the historical eruption of Azuma–Jododaira volcano, NE Japan

Earth, Planets and Space, 2023
Vulcanian activity is one of the most common eruption styles of arc andesitic volcanism on Earth. It ejects and deposits volcanic bombs around the source crater.
Takeshi Hasegawa, Bunta Kikuchi, Shohei Shibata, Yuhji Yamamoto, Takumi Imura, Masao Ban, Kae Tsunematsu, Chie Kusu, Makoto Okada, Tsukasa Ohba   +9 more
doaj   +1 more source

Volcanic SO₂ and SiF₄ visualization using 2-D thermal emission spectroscopy – Part 1: Slant-columns and their ratios [PDF]

Atmospheric Measurement Techniques, 2012
The composition and emission rates of volcanic gas plumes provide insight of the geologic internal activity, atmospheric chemistry, aerosol formation and radiative processes around it.
M. Grutter, R. Harig, A. Krueger, W. Stremme   +3 more
doaj   +1 more source

Modeling Tephra Fall and Sediment-Water Flows to Assess Their Impacts on a Vulnerable Building Stock in the City of Arequipa, Peru

Frontiers in Earth Science, 2022
Arequipa, Peru’s second economic center hosting c. 1,110,000 inhabitants, is the largest South American city exposed to a large variety of natural hazards.
J.-C. Thouret, E. Arapa, S. Charbonnier, A. Guerrero, K. Kelfoun, G. Cordoba, D. Rodriguez, O. Santoni   +7 more
doaj   +1 more source