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Fluidization in pyroclastic flows

Powder Technology
Pyroclastic flows are mixtures of gas and particles generated by gravitational collapse of lava domes or fall-back of eruption columns during explosive eruptions. They are major natural hazards because they can propagate far away from the source at speeds that largely exceed those of most natural or anthropogenic granular flows.
Salatino, Piero, Bareschino, Piero, Marzocchella, Antonio, Petrosino, Paola   +3 more
openaire   +3 more sources

Dynamical weakening of pyroclastic flows by mechanical vibrations [PDF]

EPJ Web of Conferences, 2017
Dynamical weakening of dense granular flows plays a critical role on diverse geological events such as seismic faulting and landslides. A common feature of these processes is the development of fluid-solid relative flows that could lead to fluidization ...
Valverde Jose Manuel, Soria-Hoyo Carlos, Roche Olivier   +2 more
doaj   +3 more sources

Application of an Inertia Dependent Flow Friction Model to Snow Avalanches: Exploration of the Model Using a Ping-Pong Ball Experiment

Geosciences, 2020
Snow avalanches are catastrophic phenomena because of their destructive power. Therefore, it is very important to forecast the affected area of snow avalanches using numerical simulations.
Kae Tsunematsu, Fukashi Maeno, Kouichi Nishimura   +2 more
doaj   +1 more source

New developments in the analysis of column-collapse pyroclastic density currents through numerical simulations of multiphase flows [PDF]

Solid Earth, 2012
A granular multiphase model has been used to evaluate the action of differently sized particles on the dynamics of fountains and associated pyroclastic density currents.
S. Lepore, C. Scarpati
doaj   +1 more source

Lava dome growth and mass wasting measured by a time series of ground-based radar and seismicity observations [PDF]

, 2008
Exogenous growth of Peléean lava domes involves the addition of lava from a central summit vent and mass wasting on the flanks as rockfalls and pyroclastic flows.
Loughlin, S.C., Odbert, H.M., Robertson, D. A., Pinkerton, Harry, Macfarlane, D.G., Loughlin, S. C., James, Mike R., Angelis, S., Robertson, D.A., G. Ryan, Ryan, G., Hole, J.K., Odbert, H. M., Loughlin, Susan, G. Wadge, S. C. Loughlin, Hole, J. K., Pinkerton , H., Pinkerton, H., J. K. Hole, D. G. Macfarlane, James, M.R., James, M. R., Macfarlane, D. G., H. M. Odbert, Ryan, Graham, H. Pinkerton, S. De Angelis, D. A. Robertson, Odbert, H., Wadge, G., Bass, V., M. R. James, De Angelis, S., Wadge, Geoff, V. Bass   +35 more
core   +1 more source

Directed Volcanic Blast as a Tragedy of October 26Th, 2010 at Merapi Volcano, Central Java

Indonesian Journal on Geoscience, 2014
DOI: 10.17014/ijog.v8i3.163Merapi is an active strato volcano located in Central Java. This volcano is regarded as the most active and most dangerous volcano in Indonesia.
Igan S. Sutawidjaja
doaj   +1 more source

High Preservation Potential Volcaniclastic Sedimentation in the Serravallian Sequence of the Amantea Basin (Coastal Chain, North-Western Calabria)

Geosciences, 2021
Evidence of volcaniclastic sedimentation occurs in the first depositional sequence of the sedimentary succession of the Amantea Basin. Volcaniclastic deposits are intercalated in the upper part of a sandstone formation and these show a maximum thickness ...
Cannata Chiara Benedetta, De Rosa Rosanna, Donato Paola, Morrone Consuele, Muto Francesco   +4 more
doaj   +1 more source

Lava production at Soufriere Hills Volcano, Montserrat: 1995-2009 [PDF]

, 2010
[1] We estimate that about 1 km3 of andesitic lava has been produced at Soufrière Hills Volcano, Montserrat from 1995 to 2009. There were three major episodes of extrusion, each lasting about 2 to 3.5 years and producing about 280 to 340 M m3 of lava ...
Calder, E. S., Herd, R, Komorowski, J-C, Komorowski, JC, Calder, E.S., Wadge, Geoffrey, Calder, ES, Komorowski, J. -C., Calder, E. S.; id_orcid, Komorowski, J.-C., Ryan, G., Ryan, Graham, Herd, R., Wadge, G., Wadge, G   +14 more
core   +1 more source

Long-term volcanic hazard assessment on El Hierro (Canary Islands) [PDF]

Natural Hazards and Earth System Sciences, 2014
Long-term hazard assessment, one of the bastions of risk-mitigation programs, is required for land-use planning and for developing emergency plans.
L. Becerril, S. Bartolini, R. Sobradelo, J. Martí, J. M. Morales, I. Galindo   +5 more
doaj   +1 more source

Radar Perspective of the Aristarchus Pyroclastic Deposit and Implications for Future Missions

The Planetary Science Journal, 2023
The Aristarchus plateau represents one of the most complex volcanic provinces on the lunar surface and is host to the largest pyroclastic deposit on the Moon.
G. A. Morgan, E. R. Jawin, B. A. Campbell, G. W. Patterson, A. M. Bramson, C. A. Nypaver, J. D. Stopar, L. M. Jozwiak, A. M. Stickle, S. S. Bhiravarasu   +9 more
doaj   +1 more source