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Olivier Roche

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Experimental Measurement of Enhanced and Hindered Particle Settling in Turbulent Gas‐Particle Suspensions, and Geophysical Implications

Baptiste Penlou , Olivier Roche , Michael Manga , Siet van den Wildenberg
Journal of Geophysical Research : Solid Earth, 2023, 128 (3), ⟨10.1029/2022JB025809⟩
Journal articles hal-04012883v1
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High CO2 content in magmas of the explosive andesitic Enco eruption of Mocho-Choshuenco volcano (Chile)

Jean-Guillaume Feignon , Nicolas Cluzel , Federica Schiavi , Séverine Moune , Olivier Roche et al.
Bulletin of Volcanology, 2022, 84 (4), pp.40. ⟨10.1007/s00445-022-01550-y⟩
Journal articles insu-03643025v1
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Long-runout pyroclastic density currents: Analysis and implications

Olivier Roche , Christopher Henry , Nourddine Azzaoui , Arnaud Guillin
Geology, 2022, 50 (10), pp.1172-1176. ⟨10.1130/G50215.1⟩
Journal articles hal-03792847v1
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PyroCLAST: a new experimental framework to investigate overspilling of channelized, concentrated pyroclastic currents

V. Gueugneau , S. Charbonnier , Olivier Roche
Bulletin of Volcanology, 2022, 85 (1), pp.5. ⟨10.1007/s00445-022-01623-y⟩
Journal articles hal-03924443v1
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Influence of the topography of stratovolcanoes on the propagation and channelization of dense pyroclastic density currents analyzed through numerical simulations

Alvaro Aravena , Olivier Roche
Bulletin of Volcanology, 2022, 84, ⟨10.1007/s00445-022-01576-2⟩
Journal articles insu-03708896v1
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Tephra Fallout Probabilistic Hazard Maps for Cotopaxi and Guagua Pichincha Volcanoes (Ecuador) With Uncertainty Quantification

Alessandro Tadini , N. Azzaoui , Olivier Roche , P. Samaniego , B. Bernard et al.
Journal of Geophysical Research : Solid Earth, 2022, 127 (2), ⟨10.1029/2021JB022780⟩
Journal articles hal-03603654v1
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Granular mixture deflation and generation of pore fluid pressure at the impact zone of a pyroclastic fountain: Experimental insights

Allan Fries , Olivier Roche , Guillaume Carazzo
Journal of Volcanology and Geothermal Research, 2021, 414, pp.107226. ⟨10.1016/j.jvolgeores.2021.107226⟩
Journal articles hal-03254051v1
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Influence of bottom roughness and ambient pressure conditions on the emplacement of experimental dam-break granular flows

Santiago Montserrat , Lady Ordoñez , Aldo Tamburrino , Olivier Roche
Granular Matter, 2021, 23 (3), ⟨10.1007/s10035-021-01125-2⟩
Journal articles hal-03254037v1
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Experimental assessment of the effective friction at the base of granular chute flows on a smooth incline

Olivier Roche , Siet van den Wildenberg , Alexandre Valance , Renaud Delannay , A. Mangeney et al.
Physical Review E , 2021, 103 (4), pp.042905. ⟨10.1103/PhysRevE.103.042905⟩
Journal articles hal-03249403v1
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Pressure-dependent threshold in a granular flow: Numerical modeling and experimental validation

L. Chupin , T. Dubois , M. Phan , Olivier Roche
Journal of Non-Newtonian Fluid Mechanics, 2021, 291, pp.104529. ⟨10.1016/j.jnnfm.2021.104529⟩
Journal articles hal-03254021v1
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Laboratory Landquakes: Insights From Experiments Into the High‐Frequency Seismic Signal Generated by Geophysical Granular Flows

M. Arran , A. Mangeney , J. de Rosny , M. Farin , R. Toussaint et al.
Journal of Geophysical Research: Earth Surface, 2021, 126 (5), ⟨10.1029/2021JF006172⟩
Journal articles hal-03253991v1
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The influence of gas pore pressure in dense granular flows: numerical simulations versus experiments and implications for pyroclastic density currents

Alvaro Aravena , Laurent Chupin , Thierry Dubois , Olivier Roche
Bulletin of Volcanology, 2021, 83 (11), ⟨10.1007/s00445-021-01507-7⟩
Journal articles hal-03408294v1
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Pressure-dependent threshold in a granular flow: numerical modelling and experimental validation

Laurent Chupin , Thierry Dubois , Minh Phan , Olivier Roche
Journal of Non-Newtonian Fluid Mechanics, 2021, ⟨10.1016/j.jnnfm.2021.104529⟩
Journal articles hal-02562000v2
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The Tutupaca volcanic complex (Southern Peru): Eruptive chronology and successive destabilization of a dacitic dome complex

J. Mariño , Pablo Samaniego , N. Manrique , P. Valderrama , Olivier Roche et al.
Journal of South American Earth Sciences, 2021, 109, pp.103227. ⟨10.1016/j.jsames.2021.103227⟩
Journal articles hal-03254008v1
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Experimental Insights on the Propagation of Fine‐Grained Geophysical Flows Entering Water

Alexis Bougouin , Olivier Roche , Raphael Paris , Herbert E Huppert
Journal of Geophysical Research. Oceans, 2021, 126 (4), ⟨10.1029/2020JC016838⟩
Journal articles hal-03192290v1
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Discharge rate of explosive volcanic eruption controls runout distance of pyroclastic density currents

Olivier Roche , Nourddine Azzaoui , Arnaud Guillin
Earth and Planetary Science Letters, 2021, 568, pp.117017. ⟨10.1016/j.epsl.2021.117017⟩
Journal articles hal-03254073v1
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Quantifying the Uncertainty of a Coupled Plume and Tephra Dispersal Model: PLUME‐MOM/HYSPLIT Simulations Applied to Andean Volcanoes

M. Alessandro Tadini , Olivier Roche , P. Samaniego , A. Guillin , N. Azzaoui et al.
Journal of Geophysical Research : Solid Earth, 2020, 125 (2), ⟨10.1029/2019JB018390⟩
Journal articles hal-02453781v1
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Impact of Fluidized Granular Flows into Water: Implications for Tsunamis Generated by Pyroclastic Flows

Alexis Bougouin , Raphael Paris , Olivier Roche
Journal of Geophysical Research : Solid Earth, 2020, 125 (5), ⟨10.1029/2019JB018954⟩
Journal articles hal-02794348v1
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Acoustic probing of the particle concentration in turbulent granular suspensions in air

S. van den Wildenberg , X. Jia , Olivier Roche
Scientific Reports, 2020, 10 (1), ⟨10.1038/s41598-020-73427-z⟩
Journal articles hal-02962260v1

A laboratory-scale study on the role of mechanical vibrations in pore pressure generation in pyroclastic materials: implications for pyroclastic flows

Carlos Soria-Hoyo , José Manuel Valverde , Olivier Roche
Bulletin of Volcanology, 2019, 81 (2), ⟨10.1007/s00445-019-1271-3⟩
Journal articles hal-02615201v1
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Continuum modelling of pressure‐balanced and fluidized granular flows in 2D: comparison with glass bead experiments and implications for concentrated pyroclastic currents

E.C.P. Breard , J. Dufek , Olivier Roche
Journal of Geophysical Research : Solid Earth, 2019, 124, pp.5557-5583. ⟨10.1029/2018JB016874⟩
Journal articles hal-02277041v1
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The contribution of experimental volcanology to the study of the physics of eruptive processes, and related scaling issues: A review

Olivier Roche , Guillaume Carazzo
Journal of Volcanology and Geothermal Research, 2019, 384, pp.103-150. ⟨10.1016/j.jvolgeores.2019.07.011⟩
Journal articles hal-02277033v1
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Maximum Solid Phase Concentration in Geophysical Turbulent Gas‐Particle Flows: Insights From Laboratory Experiments

A. Weit , Olivier Roche , T. Dubois , M. Manga
Geophysical Research Letters, 2019, 46 (12), pp.6388-6396. ⟨10.1029/2019GL082658⟩
Journal articles hal-02277038v1
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Experimental Measurement of the Solid Particle Concentration in Geophysical Turbulent Gas-Particle Mixtures

A. Weit , Olivier Roche , Thierry Dubois , M. Manga
Journal of Geophysical Research, 2018, 123 (5), pp.3747 - 3761. ⟨10.1029/2018JB015530⟩
Journal articles hal-01914237v1
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Granular fingering as a mechanism for ridge formation in debris avalanche deposits: Laboratory experiments and implications for Tutupaca volcano, Peru

P. Valderrama , Olivier Roche , P. Samaniego , Benjamin van Wyk de Vries , G. Araujo et al.
Journal of Volcanology and Geothermal Research, 2018, 349, pp.409-418. ⟨10.1016/j.jvolgeores.2017.12.004⟩
Journal articles hal-01677525v1

Autofluidization of collapsing bed of fine particles: Implications for the emplacement of pyroclastic flows

Corentin Chédeville , Olivier Roche
Journal of Volcanology and Geothermal Research, 2018, 368, pp.91 - 99. ⟨10.1016/j.jvolgeores.2018.11.007⟩
Journal articles hal-01927748v1
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Effects of pore pressure in pyroclastic flows : numerical simulation and experimental validation

V. Gueugneau , K. Kelfoun , Olivier Roche , L. Chupin
Geophysical Research Letters, 2017, 44 (5), pp.2194-2202. ⟨10.1002/2017GL072591⟩
Journal articles hal-01625001v1
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Two-dimensional simulation by regularization of free surface viscoplastic flows with Drucker-Prager yield stress and application to granular collapse

Christelle Lusso , Alexandre Ern , François Bouchut , Anne Mangeney , Maxime Farin et al.
Journal of Computational Physics, 2017, 333, pp.387-408. ⟨10.1016/j.jcp.2016.12.036⟩
Journal articles hal-01133786v2
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Granular and particle-laden flows: from laboratory experiments to field observations

Renaud Delannay , Alexandre Valance , Anne Mangeney , Olivier Roche , Patrick Richard et al.
Journal of Physics D: Applied Physics, 2017, 50 (5), pp.40. ⟨10.1088/1361-6463/50/5/053001⟩
Journal articles hal-01481019v1

Eruptive parameters and dynamics of the April 2015 sub-Plinian eruptions of Calbuco volcano (southern Chile)

Angelo Castruccio , Jorge Clavero , Andrea Segura , Pablo Samaniego , Olivier Roche et al.
Bulletin of Volcanology, 2016, 78 (9), ⟨10.1007/s00445-016-1058-8⟩
Journal articles hal-01637081v1

Enhanced run-out of dam-break granular flows caused by initial fluidization and initial material expansion

S. Montserrat , A. Tamburrino , Olivier Roche , Y. Niño , C. F. Ihle et al.
Granular Matter, 2016, 18 (1), ⟨10.1007/s10035-016-0604-6⟩
Journal articles hal-01637427v1

The controls and consequences of substrate entrainment by pyroclastic density currents at Mount St Helens, Washington (USA)

N.M. Pollock , B.D. Brand , Olivier Roche
Journal of Volcanology and Geothermal Research, 2016, 325, pp.135 - 147. ⟨10.1016/j.jvolgeores.2016.06.012⟩
Journal articles hal-01637535v1

Dynamic implications of ridges on a debris avalanche deposit at Tutupaca volcano (southern Peru)

Patricio Valderrama , Olivier Roche , Pablo Samaniego , Benjamin van Wyk de Vries , Karine Bernard et al.
Bulletin of Volcanology, 2016, 78 (2), ⟨10.1007/s00445-016-1011-x⟩
Journal articles hal-01638575v1
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Highly explosive eruption of the monogenetic 8.6ka BP La Vache et Lassolas scoria cone complex (Chaîne des Puys, France)

Simone Jordan , Jean-Luc Le Pennec , Lucia Gurioli , Olivier Roche , Pierre Boivin et al.
Journal of Volcanology and Geothermal Research, 2016, 313, pp.15-28. ⟨10.1016/j.jvolgeores.2015.12.006⟩
Journal articles hal-01637384v1
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Slow-moving and far-travelled dense pyroclastic flows during the Peach Spring super-eruption

Olivier Roche , D. C. C Buesch , G. A. A Valentine
Nature Communications, 2016, 7, ⟨10.1038/ncomms10890⟩
Journal articles hal-01637183v1
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Are eruptions from linear fissures and caldera ring dykes more likely to produce pyroclastic flows?

D.E. Jessop , J. Gilchrist , A.M. Jellinek , Olivier Roche
Earth and Planetary Science Letters, 2016, 454, pp.142 - 153. ⟨10.1016/j.epsl.2016.09.005⟩
Journal articles hal-01637379v1

Nature and velocity of pyroclastic density currents inferred from models of entrainment of substrate lithic clasts

Olivier Roche
Earth and Planetary Science Letters, 2015, 418, pp.115-125. ⟨10.1016/j.epsl.2015.03.001⟩
Journal articles hal-01134741v1
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MeMoVolc consensual document: a review of cross-disciplinary approaches to characterizing small explosive magmatic eruptions

Lucia Gurioli , D. Andronico , Patrick Bachèlery , Hélène Balcone-Boissard , Jean Battaglia et al.
Bulletin of Volcanology, 2015, 77, pp.49. ⟨10.1007/s00445-015-0935-x⟩
Journal articles hal-01170133v1

Evolution of Irruputuncu volcano, Central Andes, northern Chile

I. Rodríguez , Olivier Roche , Séverine Moune , F. Aguilera , E. Campos et al.
Journal of South American Earth Sciences, 2015, 63, pp.385 - 399. ⟨10.1016/j.jsames.2015.08.012⟩
Journal articles hal-01914263v1

The historical (218 ± 14 aBP) explosive eruption of Tutupaca volcano (Southern Peru)

Pablo Samaniego , Patricio Valderrama , Jersy Mariño , Benjamin van Wyk de Vries , Olivier Roche et al.
Bulletin of Volcanology, 2015, 77, pp.51. ⟨10.1007/s00445-015-0937-8⟩
Journal articles hal-01172542v1

Influence of slope angle on pore pressure generation and kinematics of pyroclastic flows: insights from laboratory experiments

Corentin Chedeville , Olivier Roche
Bulletin of Volcanology, 2015, 77 (11), art. 96 [13 p.]. ⟨10.1007/s00445-015-0981-4⟩
Journal articles hal-01914260v1

Towards a quantitative understanding of pyroclastic flows: Effects of expansion on the dynamics of laboratory fluidized granular flows

L. Girolami , Timothy H. Druitt , Olivier Roche
Journal of Volcanology and Geothermal Research, 2015, 296, pp.31-39. ⟨10.1016/j.jvolgeores.2015.03.008⟩
Journal articles hal-01172391v1
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Viscoplastic modeling of granular column collapse with pressure-dependent rheology

Ioan Ionescu , Anne Mangeney , François Bouchut , Olivier Roche
Journal of Non-Newtonian Fluid Mechanics, 2015, 219, pp.1-18. ⟨10.1016/j.jnnfm.2015.02.006⟩
Journal articles hal-01080456v1

Dome collapse mechanisms and block-and-ash flow emplacement dynamics inferred from deposit and impact mark analysis, Mono Craters, CA

R.L. Dennen , M. I. Bursik , Olivier Roche
Journal of Volcanology and Geothermal Research, 2014, 276, pp.1-9. ⟨10.1016/j.jvolgeores.2014.02.016⟩
Journal articles hal-01134228v1
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Autofluidization of pyroclastic flows propagating on rough substrates as shown by laboratory experiments

Corentin Chedeville , Olivier Roche
Journal of Geophysical Research, 2014, 119, pp.1764-1776. ⟨10.1002/2013JB010554⟩
Journal articles hal-01133677v1
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Fundamental changes of granular flow dynamics, deposition, and erosion processes at high slope angles: Insights from laboratory experiments

Maxime Farin , Anne Mangeney , Olivier Roche
Journal of Geophysical Research, 2014, 119, pp.504-532. ⟨10.1002/2013JF002750⟩
Journal articles hal-01133676v1

Experimental study of dense pyroclastic density currents using sustained, gas-fluidized granular flows

Pete J. Rowley , Olivier Roche , Timothy H. Druitt , Ray Cas
Bulletin of Volcanology, 2014, 76, pp.855. ⟨10.1007/s00445-014-0855-1⟩
Journal articles hal-01133621v1
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Dynamic pore-pressure variations induce substrate erosion by pyroclastic flows

Olivier Roche , Yarko Niño , Anne Mangeney , Brittany Brand , Nicholas Pollock et al.
Geology, 2013, 41 (10), pp.1107-1110. ⟨10.1130/G34668.1⟩
Journal articles hal-00866159v1

Depositional processes and gas pore pressure in pyroclastic flows: an experimental perspective

Olivier Roche
Bulletin of Volcanology, 2012, 74, pp.1807-1820. ⟨10.1007/s00445-012-0639-4⟩
Journal articles hal-00793602v1
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Dynamics of dense granular flows of small-and-large-grain mixtures in an ambient fluid

C. Meruane , A. Tamburrino , Olivier Roche
Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2012, 86, pp.026311. ⟨10.1103/PhysRevE.86.026311⟩
Journal articles hal-00784192v1
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Pore fluid pressure diffusion in defluidizing granular columns

Santiago Montserrat , Aldo Tamburrino , Olivier Roche , Yarko Niño
Journal of Geophysical Research: Earth Surface, 2012, 117 (6), pp.F02034. ⟨10.1029/2011JF002164⟩
Journal articles hal-00720261v1

LiDAR derived morphology of the 1993 Lascar pyroclastic flow deposits, and implication for flow dynamics and rheology

D.E. Jessop , Karim Kelfoun , Philippe Labazuy , Anne Mangeney , Olivier Roche et al.
Journal of Volcanology and Geothermal Research, 2012, 245-246, pp.81-97. ⟨10.1016/j.jvolgeores.2012.06.030⟩
Journal articles hal-00787536v1

On the run-out distance of geophysical gravitational flows: Insight from fluidized granular collapse experiments

Olivier Roche , M. Attali , Anne Mangeney , A. Lucas
Earth and Planetary Science Letters, 2011, 311, pp.375-385. ⟨10.1016/j.epsl.2011.09.023⟩
Journal articles hal-00682312v1
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Erosion and mobility in granular collapse over sloping beds

A. Mangeney , Olivier Roche , O. Hungr , N. Mangold , Gloria Faccanoni et al.
Journal of Geophysical Research : Solid Earth, 2010, 115 (F3), pp.F03040. ⟨10.1029/2009JF001462⟩
Journal articles hal-00521671v1
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Pore fluid pressure and internal kinematics of gravitional laboratory air-particle flows: Insights into the emplacement dynamics of pyroclastic flows

Olivier Roche , S. Montserrat , Y. Niño , A. Tamburrino
Journal of Geophysical Research : Solid Earth, 2010, 115, pp.B09206. ⟨10.1029/2009JB007133⟩
Journal articles hal-00521673v1

Particle velocity fields and depositional processes in laboratory ash flows, with implications for the sedimentation of dense pyroclastic flows

Laurence Girolami , Olivier Roche , Timothy H. Druitt , Thomas Corpetti
Bulletin of Volcanology, 2010, 72, pp.747-759. ⟨10.1007/s00445-010-0356-9⟩
Journal articles hal-00522979v1
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Velocity fields and depositional processes in laboratory ash flows, with implications for the dynamics of dense pyroclastic flows

L Girolami , Olivier Roche , T. Druitt , T Corpetti
Bulletin of Volcanology, 2010
Journal articles hal-02169477v1

On the role of the ambient fluid on gravitational granular flow dynamics

C. Meruane , A. Tamburrino , Olivier Roche
Journal of Fluid Mechanics, 2010, 648, pp.381-404. ⟨10.1017/S002211200993181⟩
Journal articles hal-00521666v1
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Propagation and hindered settling of laboratory ash flows

L Girolami , T. Druitt , Olivier Roche , Z. Khrabrykh
Journal of Geophysical Research : Solid Earth, 2008, 113 (B2), pp.B02202. ⟨10.1029/2007JB005074⟩
Journal articles hal-02169463v1
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Experimental observations of water-like behavior of initially fluidized, dam break granular flows and their relevance for the propagation of ash-rich pyroclastic flows

Olivier Roche , Santiago Montserrat , Yarko Niño , Aldo Tamburrino
Journal of Geophysical Research : Solid Earth, 2008, 113 (B12), ⟨10.1029/2008JB005664⟩
Journal articles hal-00381402v1

The influence of particle size on the flow of initially fluidized powders.

Olivier Roche , M.A. Gilbertson , J.C. Phillips , R.S.J. Sparks
Powder Technology, 2006, 166, pp.167-174. ⟨10.1016/j.powtec.2006.05.010⟩
Journal articles hal-00272268v1

Inviscid behaviour of fines-rich pyroclastic flows inferred from experiments on gas–particle mixtures

Olivier Roche , R Gilbertson , J Phillips , R Sparks
Earth and Planetary Science Letters, 2005, 240 (2), pp.401 - 414. ⟨10.1016/j.epsl.2005.09.053⟩
Journal articles hal-01914230v1
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Experimental study of gas-fluidized granular flows with implications for pyroclastic flow emplacement

Olivier Roche , M. Gilbertson , J. Phillips , R. Sparks
Journal of Geophysical Research, 2004, 109 (B10), ⟨10.1029/2003JB002916⟩
Journal articles hal-01914219v1
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Experiments on deaerating granular flows and implications for pyroclastic flow mobility

Olivier Roche , M Gilbertson , J C Phillips , R S J Sparks
Geophysical Research Letters, 2002, 29 (16), pp.40-1-40-4. ⟨10.1029/2002gl014819⟩
Journal articles hal-03031507v1

Experimental aqueous fluidization of ignimbrite

Olivier Roche , Timothy H. Druitt , R a F Cas
Journal of Volcanology and Geothermal Research, 2001, 112 (1-4), pp.267-280
Journal articles hal-03031481v1

Onset of caldera collapse during ignimbrite eruptions

Olivier Roche , Timothy Druitt
Earth and Planetary Science Letters, 2001, 191 (3-4), pp.191-202
Journal articles hal-03031494v1

Sub-surface structures and collapse mechanisms of summit pit craters

Olivier Roche , B van Wyk de Vries , Timothy H. Druitt
Journal of Volcanology and Geothermal Research, 2001, 105 (1-2), pp.1-18
Journal articles hal-03031476v1
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Experimental study of caldera formation

Olivier Roche , Timothy H. Druitt , Olivier Merle
Journal of Geophysical Research, 2000, 105 (B1), pp.395-416
Journal articles hal-03031456v1

Les aléas volcaniques

Raphael Paris , Philipson Bani , Magdalena Oryaëlle Chevrel , Franck Donnadieu , Julia Eychenne et al.
Lénat Jean-François. Aléas et surveillance de l’activité volcanique 1 : approches géologiques et historiques, Chap 2, ISTE editions, pp.83-158, 2022, Geosciences, 978-1-78948-043-6
Book sections hal-03865907v1

Volcanic Hazards

Raphael Paris , Philipson Bani , Magdalena Oryaëlle Chevrel , Franck Donnadieu , Julia Eychenne et al.
Jean-François Lénat, University of Clermont-Ferrand, France. Hazards and Monitoring of Volcanic Activity 1 - Geological and Historic Approaches, ISTE; WILEY, pp.75-138, 2022, SCIENCES - Litosphere-Asthenosphere Interactions, 9781789450439
Book sections hal-03877139v1
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FLUIDISATION BY PORE PRESSURE OF DENSE GRANULAR FLOWS: NUMERICAL SIMULATIONS VERSUS EXPERIMENTS

Alvaro Aravena , Laurent Chupin , Thierry Dubois , Olivier Roche
8th European Congress on Computational Methods in Applied Sciences and Engineering ( ECCOMAS 2022), Jun 2022, Oslo, Norway
Conference papers hal-03726486v2

Relation entre le débit éruptif et la distance de parcours des écoulements pyroclastiques : analyse des données d'éruptions volcaniques explosives

Olivier Roche
27e édition de la Réunion des Sciences de la Terre, SGF, CNRS, Laboratoire de Géologie de Lyon ou l’étude de la Terre, des planètes et de l’environnement, Nov 2021, Lyon, France
Conference papers hal-03588174v1

An analysis of the relationship between mass eruption rate and runout distance of pyroclastic density currents

Olivier Roche , N. Azzaoui , Arnaud Guillin
Joint JpGU-AGU meeting, Jul 2020, Chiba, Japan
Conference papers hal-03003795v1
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Écoulement granulaire fluidisé impactant l'eau : Application aux tsunamis volcaniques

Alexis Bougouin , R. Paris , Olivier Roche
24ème Congrès Français de Mécanique, Aug 2019, Brest, France
Conference papers hal-02431199v1

Succesive desetabilization of a dome complex constructed on an extinct, hydrothermally altered volcano: The Tutupaca Volcano case study (Southern Perú)

J. Mariño , Pablo Samaniego , N. Manrique , P. Valderrama , Olivier Roche et al.
8th International Symposium on Andean Geodynamics (ISAG), Sep 2019, Quito, Ecuador
Conference papers hal-02544345v1

Using experimentally-derived scaling relationships to extract flow velocities and thicknesses from the deposits of pyroclastic currents

N. Pollock , Olivier Roche , B. Brand
AGU Fall meeting, Dec 2019, San Francisco, United States
Conference poster hal-02528032v1

Developing probabilistic tephra fallout hazard maps for Cotopaxi and Guagua Pichincha volcanoes, Ecuador, with uncertainty quantification

Alessandro Tadini , Olivier Roche , Pablo Samaniego , A. Guillin , N. Azzaoui et al.
AGU Fall meeting, Dec 2019, San Francisco, United States
Conference poster hal-02453759v1

What is the maximum solid phase concentration in volcanic turbulent gas-particle mixtures? Experimental observations and implications for natural flows

A. Weit , Olivier Roche , T. Dubois , M. Manga
AGU Fall meeting, Dec 2019, San Francisco, United States
Conference poster hal-02528071v1

Factors controlling the dynamics of volcanic granular mass flows: insights from experimental measurements of the basal forces of granular flows in an inclined channel

Olivier Roche , Siet van den Wildenberg , Alexandre Valance , Renaud Delannay , A Mangeney et al.
AGU fall meeting, Dec 2019, San Francisco, United States
Conference poster hal-02528054v1

Experimental modeling of tsunamis generated by pyroclastic flows: Fluidized granular flows into water

Alexis Bougouin , Raphael Paris , Olivier Roche
AGU Fall meeting, Dec 2019, San Francisco, United States
Conference poster hal-02528018v1

High CO2 content in magmas at an arc volcano : the andesitic Enco eruption of Mocho-Choshuenco volcano (Chile)

J.G. Feignon , Olivier Roche , Séverine Moune , Nicolas Cluzel , Federica Schiavi et al.
EGU General Assembly, Apr 2019, Vienne, Austria
Conference poster hal-02404331v1

Validating the combined PLUME-MoM and HYSPLIT numerical models using field data from Ecuadorian volcanoes

Alessandro Tadini , G. Guillin , Olivier Roche , Pablo Samaniego , N. Azzoui et al.
Cities on volcanoes, Sep 2018, Naples, Italy
Conference poster hal-02453916v1