Results 101 to 110 of about 1,522 (205)

Unraveling pyroclastic density current dynamics with multiparameter geophysical sensing

Communications Earth & Environment
Detecting, locating, and characterising the dynamics of destabilised volcanic material is critical for assessing the extreme hazards posed by volcanic mass flows, such as pyroclastic density currents.
Francesco Biagioli, Jean-Philippe Métaxian, Eléonore Stutzmann, Pascal Bernard, Giorgio Lacanna, Anne Mangeney, Giacomo Ulivieri, Gilda Risica, Alister Trabattoni, Marc Peruzzetto, Lorenzo Innocenti, Maurizio Ripepe   +11 more
doaj   +1 more source

Pumice cone eruptions at Aluto volcano, Ethiopia

Volcanica
Pumice cones are volcanic landforms that exist worldwide, but whose eruption has never been observed. Interpretations of these eruptions vary significantly in style, intensity, and magnitude, pertinent for volcanic hazard assessment.
Ben Clarke, Eliza S. Calder, Karen Fontijn, Firawalin Desalegn, Pablo Tierz, Gezahegn Yirgu   +5 more
doaj   +1 more source

Dynamic Statistical Models for Pyroclastic Density Current Generation at Soufrière Hills Volcano

Frontiers in Earth Science, 2018
To mitigate volcanic hazards from pyroclastic density currents, volcanologists generate hazard maps that provide long-term forecasts of areas of potential impact. Several recent efforts in the field develop new statistical methods for application of flow
Robert L. Wolpert, Elaine T. Spiller, Eliza S. Calder   +2 more
doaj   +1 more source

Multiphase flow modeling and numerical simulation of pyroclastic density currents

, 2014
Pyroclastic density currents are hot and high-density mixtures of gas and particles of different sizes which can be originated during explosive volcanic events by the fragmentation of a viscous magma.
ORSUCCI, SIMONE
core  

An intrusion layer in stationary incompressible fluids Part 2: A solitary wave

, 2006
The propagation of a solitary wave in a horizontal fluid layer is studied. There is an interfacial free surface above and below this intrusion layer, which is moving at constant speed through a stationary density-stratified fluid system.
Forbes, L.K., Hocking, G.C.
core  

Seismic characterization of pyroclastic flow activity at Soufrière Hills Volcano, Montserrat, 8 January 2007 [PDF]

Natural Hazards and Earth System Sciences, 2007
A partial dome collapse with concurrent pyroclastic flow (PF) activity occurred at Soufrière Hills Volcano (SHV), Montserrat on 8 January 2007. Pyroclastic density currents were observed to propagate from the Northwest and West sectors of the summit dome
S. De Angelis, V. Bass, V. Hards, G. Ryan   +3 more
doaj  

Transient Dynamics in Particle‐laden Density Currents: Insights Into Dilute Pyroclastic Density Current Runout

Pyroclastic density currents (PDCs) are complex, multiphase systems where density strati cation controls the ows' mixing, deposition, and runout, presenting signi cant challenges in hazard forecasting.
Cerminara, Matteo, Breard, Eric, O'Donnell, Sean, Dufek, Josef   +3 more
core   +1 more source

Modelling pyroclastic density currents from a subplinian eruption at La Soufrière de Guadeloupe (West Indies, France). [PDF]

Bull Volcanol, 2020
Esposti Ongaro T, Komorowski JC, Legendre Y, Neri A.   +3 more
europepmc   +1 more source

Explaining the origin of deposit-derived pyroclastic density currents

Bulletin of Volcanology
Abstract Pyroclastic density currents (PDCs) generated by the collapse of incandescent volcanic deposits represent a widespread but poorly understood hazard at active volcanoes. Their dynamics remain less constrained than those of dome- or column-collapse PDCs.
Federico Di Traglia, Alessia Falasconi, Lorenzo Borselli   +2 more
openaire   +1 more source

Effects of Multiphase Turbulence on the Flow and Hazard Behavior of Dilute Pyroclastic Density Currents A

<p>Appendix A: General<br>All codes run in a free Python environment. To ensure reproducibility and avoid issues with versions of Python and single packages, Appendix A contains the Anaconda environment ‘Anaconda_Environment.yaml’.
Uhle, Daniel Holger
core   +1 more source