Dr Hugh Tuffen

Reader in Volcanology

Research Overview

Hugh is a volcanologist, Royal Society University Research Fellow and Lecturer in LEC. He is fascinated by the power and beauty of volcanoes, and committed to help better understand their behaviour to assist the many millions threatened by volcanic activity. His uses a combination of fieldwork, geochemical analysis, experimentation and modelling to investigate key eruption-controlling processes.

Research Interests

Current research interests include:

How does gas escape from highly-viscous, silica-rich magma?

Tuffisite veins are formed by venting of gas and ash through fractures in and around conduits and lava domes, as seen in my 2012 BBC2 film from Cordon Caulle. They are thought to be key eruption controls, mediating the escape of gas from highly-viscous magma, and responisble for earthquake triggering in silicic eruptions. However, they are also known to seal up, preventing pressure release and driving explosions. Little is understood about the timescale and mechanism of tuffisite formation, the amount of gas they can deliver, and how rapidly they become blocked and sealed. We are using field and micro-textural methods to characterise the nature of tuffisite veins from a depth of hundreds of metres in conduits up to the surface. Measurement of volatile species is proving particularly useful as a tool to reconstruct pressure changes during vein venting and blockage. This work is supported by the Royal Society and NERC and carried out in collaboration with scientists at the University of Mainz, University of Munich, McGill University and the Diamond Light Source.

What controls the explosivity of sub-ice eruptions?

A large proportion of the world's volcanoes are at least partly ice-covered, most notably in Iceland, and this makes them more hazardous, as magma interacts explosively with meltwater and rapid ice melting generates powerful floods. We know remarkably little about this type of eruption, for example whether Icelandic ash plumes such as Eyjafjalljokull 2010 are driven by dissolved volcanic gases or interactions with meltwater. AXA postdoctoral research fellow Jacqueline Owen is investigating what controlled the powerful 1918 eruption of Katla volcano in Iceland, having completed an in-depth study of the largest known sub-ice rhyolitic eruption, from nearby Torfajokull.

What controls lava flow advance?

Lava has a broad range of compositions, from low-silica basalt to high-silica rhyolite. Dramatic differences in viscosity (by several orders of magnitude) mean that basaltic lavas can advance hundreds of times more rapidly that rhyolites. However, there appear to be common processes controlling lava advance and the evolution of flow fields. We recently made the first detailed observations of an active rhyolitic lava flow, at Cordon Caulle in Chile, and discovered that slowly-moving rhyolite (1-3 metres a day) behaves in a very similar way to more fluid and commonplace basalts. In ongoing research, supported by the Royal Society and NERC, we are characterising and contrasting rhyolite lava advance at Cordon Caulle with basaltic flows at Bardarbunga, Iceland and Etna, Italy.

How does magma crystallise, degas and vesiculate?

The growth of crystals and bubbles in magma, and the loss of dissolved gases, has a transformative effect on its behaviour. For example, crystallisation mediates crust formation in lava flows, vesiculation controls the formation of magmatic foams during explosive events, and degassing determines whether explosive or effusive eruptions occur. We are using two complimentary approaches: experimentally growing crystals and vesicles in magmas in the lab to measure rates and patterns of growth, and characterising crystal and vesicle populations in ancient rocks to reconstruct what happened. Similarly, experimental degassing compliments measurement of dissolved gases in natural volcanic glasses. This research is supported by the Royal Society and AXA.

Thermal analysis of volcanic rocks and magmas

Thermal analytical techniques involve heating volcanic rock samples to magmatic temperatures (700-1200 °C) and characterising changes to their physical and chemical state. We use three approaches in my lab:

In thermogravimetric analysis, volatile species are released from samples on heating, revealing concentrations and speciations of magmatic gases, identification of mineral phases, and timescales of diffusive degassing. Recent papers have addressed obsidian hydration in Iceland, degassing in the AD79 eruption of Vesuvius, the emplacement of ignimbrites, and the nature of some of the youngest kimberlitic magma erupted on Earth.

Differential scanning calorimetry involves monitoring shifts in the thermal properties of samples during heating and cooling, and allows characterisation of crystal growth/resorption, along with the glass transition. Recent papers look at crystallisation processes in basalts and ongoing work is addressing the cooling rate of glasses as well as crystallisation kinetics.

Finally, hotstage microscopy involves visual monitoring of textural changes within samples at temperatures up to 1500 C. We are using this technique to investigate the growth of vesicles and crystals within magmas, as well as their collapse and resorption, together with the sintering of both natural and synthetic glasses. Recent papers have dealt with crystallisation of basalts and vesiculation of rhyolites, and ongoing work looks at sintering, basalt vesiculation and crystallisation of rhyolites.

Our thermal lab, thanks to funding from the Royal Society, NERC and Lancaster University, is equipped with a Netzsch STA449C Jupiter, a TA Instruments Q600 SDT hyphenated with a Hiden HPR20 exsolved gas analyser, and a Linkam TS1500 hotstage linked to a Zeiss Axioscope A1 petrological microscope.

Research Grants

2015 Royal Society University Research Fellowship Extension, PI, £410k, Conduit processes in recent Chilean rhyolite eruptions.

2013 AXA Postdoctoral Fellowship, PI, £110k, Understanding Katla, Iceland’s notorious and restless volcano: Lessons from 1918.

2012 Royal Society Equipment Grant, PI, £50k, Differential Scanning Calorimetry.

2011 NERC small grant NE/I016414/1 co-I, £65k, “Quantifying degassing-driven crystal growth in basaltic lavas”.

2010 Royal Society University Research Fellowship, PI, £563 k, 2010-2015.

2009 NERC standard grant NE/F018010/1, Co-I, £370 k, “The effects of degassing and effusion rate fluctuations on the evolution of basaltic flow fields”.

2008 NERC New Investigator grant NE/G000654/1, “Volatile degassing from magma: Insights from eruptions under Icelandic glaciers”, PI, 2008-2010, £6k.

2007 NERC Research Fellowship NE/E013740/1, PI, £260k.

2006 NERC standard grant NE/D012910/1, researcher co-I, £550 k (£21k to Lancaster), “Fracture mechanics of dome lava”.

2004 Leverhulme Early Career Research Fellowship, Lancaster-UCL, PI, £90 k.

Current Teaching

LEC478 Physical Volcanology

My Role

Royal Society University Research Fellow and Lecturer

Director of Studies, MSc in Volcanology and Geological Hazards

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Brittle-ductile magma deformation and explosive-effusive behaviour: insight from Icelandic rhyolitic dykes
McGowan, E., Tuffen, H., James, M., Wynn, P. 22/07/2015
Poster

Petrology, geochemistry and low-temperature alteration of extrusive lavas and pyroclastic rocks of the Igwisi Hills kimberlites, Tanzania.
Willcox, A., Buisman, I., Sparks, S., Brown, R., Manya, S., Schumacher, J.C., Tuffen, H. 5/06/2015 In: Chemical Geology. 405, p. 82-101. 20 p.
Journal article

Cristobalite in the 2011–2012 Cordón Caulle eruption (Chile)
Schipper, C.I., Castro, J., Tuffen, H., Wadsworth, F., Chappell, D., Pantoja, A.E., Simpson, M., Le Ru, E.C. 05/2015 In: Bulletin of Volcanology. 77, 5, 19 p.
Journal article

Seasonal release of anoxic geothermal meltwater from the Katla volcanic system at Sólheimajökull, Iceland
Wynn, P., Morrell, D., Tuffen, H., Barker, P., Tweed, F., Burns, R. 9/03/2015 In: Chemical Geology. 396, p. 228-238. 11 p.
Journal article

Eruption and emplacement timescales of ignimbrite super-eruptions from thermo-kinetics of glass shards
Lavallee, Y., Wadsworth, F., Vasseur, J., Russell, J.K., Andrews, G., Hess, K., von Aulock, F., Kendrick, J., Tuffen, H., Biggin, A., Dingwell, D.B. 4/02/2015 In: Frontiers in Earth Science. 3, 11 p.
Journal article

Bubble, bubble, toil and trouble: the degassing of Katla 1918, a subglacial basaltic eruption
Owen, J., Tuffen, H., Coats, B. 2015
Poster

Magma degassing and fragmentation during the 1918 Katla eruption
Owen, J., Tuffen, H., Coats, B. 2015
Poster

Pressure changes before and after explosive rhyolitic bomb ejection at Chaiten, Chile recorded by water diffusion profiles around Tuffisite veins
McGowan, E., Tuffen, H., Castro, J., Berlo, K., James, M., Owen, J., Schipper, C.I., Wadsworth, F., Saubin, E., Wehbe, K. 2015
Poster

Reconstructing magma degassing in the Katla 1918 eruption through vesicle textures and dissolved volatile contents
Owen, J., Tuffen, H., Coats, B. 2015
Poster

Explosive origin of silicic lava: textural and δD–H2O evidence for pyroclastic degassing during rhyolite effusion
Castro, J.M., Bindeman, I.N., Tuffen, H., Schipper, C.I. 1/11/2014 In: Earth and Planetary Science Letters. 405, p. 52-61. 10 p.
Journal article

Fractures in a trachyandesitic lava at Öræfajökull, Iceland, used to infer subglacial emplacement in 1727–8 eruption
Forbes, A.E., Blake, S., Tuffen, H., Wilson, A. 1/11/2014 In: Journal of Volcanology and Geothermal Research. 288, p. 8-18. 11 p.
Journal article

Advances in Fourier transform infrared spectroscopy of natural glasses: from sample preparation to data analysis
von Aulock, F.W., Kennedy, B.M., Schipper, C.I., Castro, J., Martin, D., Oze, C., Watkins, J.M., Wallace, P.J., Puskar, L., Bégué, F., Nichols, A.R.L., Tuffen, H. 1/10/2014 In: Lithos. 206-207, p. 52–64. 13 p.
Journal article

Coolest jobs: Volcanologist
Tuffen, H., Waldron, M. 15/07/2014 Basingstoke : Raintree. 48 p. ISBN: 9781406280128.
Book

Entablature: fracture types and mechanisms
Forbes, A.E., Blake, S., Tuffen, H. 22/04/2014 In: Bulletin of Volcanology. 76, 13 p.
Journal article

Why it is important to improve our understanding of Katla
Owen, J., Tuffen, H. 8/01/2014
Poster

Conduit- to localized-scale degassing during Plinian eruptions: insights from major element and volatile (Cl and H2O) analysis within Vesuvius AD79 pumice
Shea, T., Hellebrand, E., Gurioli, L., Tuffen, H. 2014 In: Journal of Petrology. 55, 2, p. 315-344. 30 p.
Journal article

Chemical variation in magma caused by gas transport
Berlo, K., Tuffen, H., Smith, V., Castro, J., Pyle, D., Geraki, T., Mather, T. 15/11/2013 In: Geochimica et Cosmochimica Acta. 121, p. 436-451. 16 p.
Journal article

Exceptional mobility of an advancing rhyolitic obsidian flow at Cordon Caulle volcano in Chile: observations from Cordón Caulle, Chile, 2011-2013.
Tuffen, H., James, M., Castro, J., Schipper, C.I. 1/11/2013 In: Nature Communications. 4
Journal article

Shallow vent architecture during hybrid explosive-effusive activity at Cordón Caulle (Chile, 2011-12): evidence from direct observations and pyroclast textures
Schipper, C.I., Castro, J., Tuffen, H., James, M., How, P. 15/07/2013 In: Journal of Volcanology and Geothermal Research. 262, p. 25-37. 13 p.
Journal article

Pre-eruptive volatile content, degassing paths and depressurisation explaining the transition in style at the subglacial rhyolitic eruption of Dalakvísl, South Iceland
Owen, J., Tuffen, H., McGarvie, D. 15/05/2013 In: Journal of Volcanology and Geothermal Research. 258, p. 143-162. 20 p.
Journal article

Direct observations of degassing induced crystallization in basalts
Applegarth, L., Tuffen, H., James, M., Pinkerton, H., Cashman, K.V. 02/2013 In: Geology. 41, 2, p. 243-246. 4 p.
Journal article

Explosive subglacial rhyolitic eruptions in Iceland are fuelled by high magmatic H2O and closed system degassing.
Owen, J., Tuffen, H., McGarvie, D.W. 02/2013 In: Geology. 41, 2, p. 251-254. 4 p.
Journal article

Degassing-induced crystallization in basalts
Applegarth, L., Tuffen, H., James, M., Pinkerton, H. 1/01/2013 In: Earth-Science Reviews. 116, p. 1-16. 16 p.
Journal article

Melting ice and volcanic hazards in the twenty-first century
Tuffen, H. 2013 In: Climate forcing of geological hazards. Hoboken, N.J. : Wiley Blackwell p. 78-107. 30 p. ISBN: 9780470658659.
Chapter

Pseudopillow fracture systems in lavas: Insights into cooling mechanisms and environments from lava flow fractures
Forbes, A., Blake, S., McGarvie, D.W., Tuffen, H. 1/11/2012 In: Journal of Volcanology and Geothermal Research. 245-246, p. 68-80. 13 p.
Journal article

Paleointensity on volcanic glass of varying hydration states
Ferk, A., Leonhardt, R., Denton, J., Tuffen, H., Hess, K., Dingwell, D.B. 10/2012 In: Physics of the Earth and Planetary Interiors. 208-209, p. 25-37. 13 p.
Journal article

Using dissolved H2O in rhyolitic glasses to estimate palaeo-ice thickness during a subglacial eruption at Bláhnúkur (Torfajökull, Iceland).
Owen, J., Tuffen, H., McGarvie, D.W. 08/2012 In: Bulletin of Volcanology. 74, 6, p. 1355-1378. 24 p.
Journal article

The ongoing rhyolitic eruption at Puyehue-Cordon Caulle, Chile: observations of explosive and effusive activity and insights into rhyolitic eruptions beneath ice
Tuffen, H., Castro, J.M., Schipper, I., James, M. 18/06/2012
Poster

Measurement of volatile concentrations in volcanic glasses using thermogravimetric analysis: comparison with micro-analytical methods
Tuffen, H., Owen, J., Applegarth, L. 1/05/2012
Poster

Observations of obsidian lava flow emplacement at Puyehue-Cordón Caulle, Chile
Tuffen, H., James, M., Castro, J.M., Schipper, I. 22/04/2012
Poster

Reconstructing palaeo-ice thicknesses: on what type of volcano can the magma degassing technique be used?
Owen, J., Tuffen, H., McGarvie, D.W. 22/04/2012
Poster

Shallow vent architecture of Puyehue Cordón-Caulle, as revealed by direct observation of explosive activity
Schipper, I., Tuffen, H., Castro, J.M. 22/04/2012
Poster

Simultaneous pyroclastic and effusive venting at rhyolite volcanoes: the cases of Puyehue-Cordón Caulle and Chaitén
Castro, J.M., Schipper, I., Tuffen, H. 22/04/2012 In: Geophysical Research Abstracts. 14
Journal article

What controls the explosivity of subglacial rhyolite in Iceland?
Owen, J., Tuffen, H., McGarvie, D.W. 22/04/2012
Poster

The role of melt-fracture degassing in defusing explosive rhyolite eruptions at volcán Chaitén
Castro, J.M., Cordonnier, B., Tuffen, H., Tobin, M., Puskar, L., Martin, M.C., Bechtel, H. 17/04/2012 In: Earth and Planetary Science Letters. 333-334, n/a, p. 63-69. 7 p.
Journal article

Variations in hydration within perlitised rhyolitic lavas - evidence from Torfajökull, Iceland
Denton, J., Tuffen, H., Gilbert, J. 04/2012 In: Journal of Volcanology and Geothermal Research. 223-224, 1, p. 64-73. 10 p.
Journal article

Triptych
Tuffen, H. 2012 In: New Landmass/Neue Landmasse. Berlin : Shering Stiftung p. 76-81. 6 p. ISBN: 3981022068.
Chapter

Quantifying degassing-driven crystal growth in basaltic lavas
Applegarth, L., Tuffen, H., James, M.R., Cashman, K.V., Pinkerton, H. 5/12/2011
Abstract

Rhyolite eruptions under ice: an interconnected web of volatiles, pressure, degassing, and eruptive behaviour
Owen, J., Tuffen, H., McGarvie, D. 5/12/2011
Poster

Evolution of the mechanics of the 2004–2008 Mt. St. Helens lava dome with time and temperature
Smith, R., Sammonds, P., Tuffen, H., Meredith, P. 1/07/2011 In: Earth and Planetary Science Letters. 307, 1-2, p. 191-200. 10 p.
Journal article

Can we use variations in volatile concentrations in volcanic glass to study degassing?
Berlo, K., Pyle, D.M., Barclay, J., Mather, T.A., Tuffen, H. 10/06/2011
Conference paper

Primary and secondary water content heterogeneity in volcanic glasses
Tuffen, H. 10/06/2011
Conference paper

Ice-volcano interactions
Tuffen, H. 5/05/2011 In: Encyclopedia of Snow, Ice and Glaciers. Springer
Entry for encyclopedia/dictionary

Subglacial volcanism
Tuffen, H. 5/05/2011 In: Encyclopedia of Snow, Ice and Glaciers. Springer
Entry for encyclopedia/dictionary

Paleointensities of silicic volcanic glass: influence of emplacement rotations and devitrivication
Ferk, A., Leonhardt, R., Denton, J., Tuffen, H., Hess, K., Dingwell, D.B. 1/05/2011
Conference paper

Detecting degassing-induced crystallisation in basaltic lavas
Applegarth, L., Tuffen, H., James, M., Pinkerton, H. 2011
Abstract

Reconstructing H2O degassing in pumiceous pyroclasts from the 181 AD Taupo eruption: how to overcome the hydration problem?
Tuffen, H., Houghton, B.F., Dingwell, D.B. 2011
Abstract

Volatile contents, degassing behaviour and hydration of early-erupted rhyolitic pyroclasts and ashes from Vulcan Chaitén, Chile
Tuffen, H., Riley, C., Castro, J.M. 12/2010
Poster

Volcanism and climate: chicken and egg (or vice versa)?
Tuffen, H., Betts, R. 28/05/2010 In: Philosophical Transactions of the Royal Society of London A. 368, 1919, p. 2585-2588. 4 p.
Journal article

Multi-scale heterogeneity in rhyolitic lava at Hrafntinnuhryggur, Krafla, Iceland
Tuffen, H., Castro, J.M., Woodroffe, N., Hounslow, M. 1/05/2010
Conference paper

The use of magmatic water to reconstruct palaeo-ice thicknesses during subglacial rhyolitic eruptions
Owen, J., Tuffen, H., McGarvie, D., Pinkerton, H., Wilson, L. 1/05/2010
Abstract

Volatile concentrations in variably vesicular pyroclasts from the Rotongaio ash (181 AD Taupo eruption): did shallow magma degassing trigger exceptionally violent phreatomagmatic activity?
Tuffen, H., Dingwell, D.B., Houghton, B.F., Pinkerton, H. 1/05/2010
Conference paper

How will melting of ice affect volcanic hazards in the 21st century?
Tuffen, H. 19/04/2010 In: Philosophical Transactions of the Royal Society of London A. 368, p. 2535-2558. 24 p.
Journal article

Magma degassing during subglacial eruptions and its use to reconstruct palaeo-ice thicknesses.
Tuffen, H., Owen, J., Denton, J. 04/2010 In: Earth-Science Reviews. 99, 1-2, p. 1-18. 18 p.
Journal article

Problems and advances in the use of magmatic degassing during subglacial eruptions to reconstruct palaeo-ice thicknesses
Tuffen, H., Owen, J., Denton, J. 2010
Poster

Spherulite crystallization induces Fe-redox redistribution in silicic melt.
Castro, J.M., Cottrell, E., Tuffen, H., Logan, A., Kelley, K.A. 30/11/2009 In: Chemical Geology. 268, 3-4, p. 272-280. 9 p.
Journal article

Introduction to special issue on volcano-ice interactions on Earth and Mars : the state of the science.
Edwards, B.R., Tuffen, H., Skilling, I.P., Wilson, L. 10/09/2009 In: Journal of Volcanology and Geothermal Research. 185, 4, p. 247-250. 4 p.
Journal article

The emplacement of an obsidian dyke through thin ice : Hrafntinnuhryggur, Krafla Iceland.
Tuffen, H., Castro, J.M. 09/2009 In: Journal of Volcanology and Geothermal Research. 185, 4, p. 352-366. 15 p.
Journal article

The hydration and alteration of perlite and rhyolite
Denton, J.S., Tuffen, H., Gilbert, J.S., Odling, N. 09/2009 In: Journal of the Geological Society. 166, 5, p. 895-904. 10 p.
Journal article

Did Magma Degassing Trigger Exceptionally Violent Phreatomagmatic Fragmentation During The 181 AD Taupo Eruption?
Tuffen, H., Houghton, B.F., Dingwell, D.B., Pinkerton, H. 2009
Abstract

Heating of rhyolitic lavas by spherulite crystallisation
Tuffen, H., Castro, J.M., Wilson, L. 2009
Abstract

The 2004-2008 Mount St Helens Lava Dome: An experimental study of the influence of time and temperature on mechanical behaviour and earthquakes
Smith, R., Sammonds, P., Tuffen, H., Meredith, P. 2009
Abstract

Timescales of spherulite crystallisation in obsidian inferred from water concentration profiles
Castro, J.M., Beck, P., Tuffen, H., Nichols, A.R.L., Dingwell, D.B., Martin, M.C. 12/2008 In: American Mineralogist. 93, 11-12, p. 1816-1822. 7 p.
Journal article

Evidence for seismogenic fracture of silicic magma
Tuffen, H., Smith, R., Sammonds, P. 22/05/2008 In: Nature. 453, 7194, p. 511-514. 4 p.
Journal article

An explosive-intrusive subglacial rhyolite eruption at Dalakvisl, Torfajokull, Iceland
Tuffen, H., McGarvie, D.W., Pinkerton, H., Gilbert, J., Brooker, R.A. 05/2008 In: Bulletin of Volcanology. 70, 7, p. 841-860. 20 p.
Journal article

Brittle-ductile rheology, foam collapse and latent heat: the story of obsidian lava emplacement at Krafla volcano, Iceland
Tuffen, H., Castro, J.M. 2008
Abstract

Magma degassing during subglacial eruptions
Tuffen, H. 2008
Abstract

Will subglacial rhyolite eruptions be explosive or intrusive? Some insights from analytical models.
Tuffen, H., McGarvie, D.W., Gilbert, J.S. 10/2007 In: Annals of Glaciology. 45, 1, p. 87-94. 8 p.
Journal article

Models of ice melting and edifice growth during subglacial basaltic eruptions.
Tuffen, H. 13/03/2007 In: Journal of Geophysical Research: Solid Earth. 112, B03203, p. 1-14. 14 p.
Journal article

The eruption of a rhyolitic dyke into shallow ice: Hrafntinnuhryggur, Krafla, Iceland
Tuffen, H., Castro, J.M. 2007
Abstract

What Controls the Explosivity of Eruptions Beneath Ice Sheets? Field Evidence, Model Results and Some Challenging Questions
Tuffen, H. 2007
Abstract

Will subglacial rhyolite eruptions be explosive or intrusive? Some insights from analytical models
Tuffen, H., McGarvie, D.W., Gilbert, J. 2007 In: Papers from the International Symposium on Earth and Planetary Ice-Volcano Interactions held in Reykjavík, Iceland, on 19-23 June 2006 . Cambridge : International Glaciological Society p. 87-94. 8 p. ISBN: 9780946417407.
Chapter

Volcano-ice interactions at Prestahnukur, Iceland : rhyolite eruption during the last interglacial-glacial transition.
McGarvie, D.W., Stevenson, J.A., Burgess, R., Tuffen, H., Tindle, A.G. 10/2006 In: Annals of Glaciology. 45, 1, p. 38-47. 10 p.
Journal article

The formation of Helgafell, SW-Iceland, a monogenetic subglacial hyaloclastite ridge: Sedimentology, hydrology and ice-volcano interaction.
Schopka, H., Gudmundsson, M., Tuffen, H. 15/04/2006 In: Journal of Volcanology and Geothermal Research. 152, 3-4, p. 359-377. 19 p.
Journal article

Snow-contact volcanic facies and their use in determining past eruptive environments at Nevados de Chillán volcano, Chile
Mee, K., Tuffen, H., Gilbert, J. 02/2006 In: Bulletin of Volcanology. 68, 4, p. 363-376. 14 p.
Journal article

Pleistocene rhyolitic volcanism at Torfajökull, Iceland : eruption ages, glaciovolcanism, and geochemical evolution.
McGarvie, D.W., Burgess, R., Tindle, A.G., Tuffen, H., Stevenson, J.A. 2006 In: JÖKULL. 56, p. 57-75. 19 p.
Journal article

The trigger mechanism of low-frequency earthquakes on Montserrat.
Neuberg, J.W., Tuffen, H., Collier, L., Green, D., Powell, T., Dingwell, D.B. 2006 In: Journal of Volcanology and Geothermal Research. 153, p. 37-50. 14 p.
Journal article

Fault textures in volcanic conduits: evidence for seismic trigger mechanisms during silicic eruptions.
Tuffen, H., Dingwell, D. 04/2005 In: Bulletin of Volcanology. 67, 4, p. 370-387. 18 p.
Journal article

Repeated fracture and healing of silicic magma generate flow banding and earthquakes?
Tuffen, H., Dingwell, D.B., Pinkerton, H. 12/2003 In: Geology. 31, 12, p. 1089-1092. 4 p.
Journal article

Melting of the glacier base during a small-volume subglacial rhyolite eruption: evidence from Blahnukur, Iceland.
Tuffen, H., Pinkerton, H., Gilbert, J., McGarvie, D. 15/05/2002 In: Sedimentary Geology. 149, 1-3, p. 183-198. 16 p.
Journal article

Physical volcanology of a subglacial-to-emergent rhyolitic tuya at Rauðufossafjöll, Torfajökull, Iceland.
Tuffen, H., McGarvie, D.W., Gilbert, J.S., Pinkerton, H. 2002 In: Geological Society Special Publications. 202, p. 213-236. 24 p.
Journal article

Products of an effusive subglacial rhyolite eruption: Blahnukur, Torfajokull, Iceland.
Tuffen, H., Gilbert, J.S., McGarvie, D.W. 07/2001 In: Bulletin of Volcanology. 63, 2-3, p. 179-190. 12 p.
Journal article

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