volcanologist

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About me

I'm an experimental and computational geoscientist with a passion for volcanology. I investigate volcanic processes across a wide range of spatiotemporal scales in order to understand complex phenomena observed in nature. I have a background in experimental rock deformation and computational volcanology, coupled with hands-on machine engineering and programming experience. Past and current research topics include (1) Micro- to meso-scale rock deformation and fluid flow; (2) Reactive fluid flow in geologic systems; (3) Eruption triggers and dynamics; and (4) External forcing of volcanic hazards, including the impacts of climate change. I'm also a firm believer in open-access, a principle I advocate for in my roles as founder and Editor-in-Chief of Volcanica, Secretary of the Free Journal Network, and formerly as a council member of EarthArXiv. Found out more about these projects below. Check out my research interests or access my publications. I am Professor at Niigata University, Japan.

I come in three main flavours. Click to find out more.

Field mode

Lab mode

Desk mode

Research interests

Click on the icons below to learn more about different projects.

Climate and volcanoes

The connections between climate, weather, and volcanic hazards

Silicic eruptions

Understanding the dynamics of rare silicic eruptions

Chemical environments

Evolution of volcanic rock properties in aggressive chemical environments

Permeability

Permeability of volcanic systems and eruption dynamics

Remote-sensing

Remote-sensing-based reconstruction of volcanic landscapes

Rock mechanics

Fluid movement through deforming volcanic media

Geothermal reservoirs

Enhancing geothermal systems through acid stimulation

Volcano deformation

Linking laboratory- and edifice-scale deformation

Miscellany

Most everything else

Open access

Click on the icons below to learn more about different projects.

Volcanica logo

Volcanica

A free diamond open access volcanology journal

EarthArXiv logo

EarthArXiv

A preprint server for the Earth Sciences

Free Journal Network logo

Free Journal Network

A nonprofit organisation promoting scholarly journals run according to the Fair Open Access model

Education and experience

  • 2007–2011

    University of Stirling, UK

    B.Sc. (Hons) Environmental Geography

    • 2011–2012

      CIIV, Mexico

      Research assistant

    • 2012–2013

      Lancaster University, UK

      M.Sc. Volcanology & Geological Hazards

    • 2013–2016

      Université de Strasbourg, France

      Ph.D. Experimental Volcanology

    • 2016–2018

      Université de Strasbourg, France

      Postdoctoral research associate

    • 2018–2021

      University of Miami, FL, USA

      Postdoctoral research associate

    • 2021–2021

      Lancaster University, UK

      Researcher

    • 2022–2023

      Université de Strasbourg, France

      Research engineer; Journal manager





  • 2023–

    Niigata University, Japan

    Professor

Recent publications

PDF versions or links to open-access sources. [Download list]

Farquharson, J. I., M. J. Heap, L. Carbillet, and P. Baud, 2024.Post-failure deformation mode switching in volcanic rock. Royal Society Open Science. DOI: 10.1098/rsos.240792.


Heap, M. J., C. Harnett, J. I. Farquharson, P. Baud, M. Rosas-Carbajal, J.-C. Komorowski, M. E. S. Violay, H. A. Gilg, and T. Reuschlé, 2024. The influence of water-saturation on the strength of volcanic rocks and the stability of lava domes. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2023.107962. [feel free to email me for reprints].


Wadsworth, F. B, E. W. Llewellin, J. M. Castro, H. Tuffen, C. I. Schipper, J. E. Gardner, J. Vasseur, A. Foster, D. E. Damby, I. M. McIntosh, S. Boettcher, H. E.Unwin, M. J. Heap, J. I. Farquharson, D. B. Dingwell, K. Iacovino, R. Paisley, C. Jones, and J. Whattam, 2023. A reappraisal of explosive–effusive silicic eruption dynamics: syn-eruptive assembly of lava from the products of cryptic fragmentation. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2022.107672.


Farquharson, J. I., H. Tuffen, F. B. Wadsworth, J. Castro, H. Unwin, and C. I. Schipper, 2022.In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering. Nature Communications. DOI: 10.1038/s41467-022-32522-7.


Farquharson, J. I., and F. Amelung, 2022.Volcanic hazard exacerbated by future global warming–driven increase in heavy rainfall. Royal Society Open Science. DOI: 10.1098/rsos.220275.


Tuffen, H., J. I. Farquharson, F. B. Wadsworth, C. Webb, J. Owen, J. Castro, K. Berlo, C. I. Schipper, and K. Wehbe, 2022. Mid-loaf crisis: Internal breadcrust surfaces in rhyolitic bombs reveal the role of permeable fracture pathways in degassing damaged magma. Geology. DOI: 10.1130/G49959.1 [feel free to email me for reprints].

Aubry, T., J. I. Farquharson, C. Rowell, S. Watt, V. Pinel, F. Beckett, J. Fasullo, P. Hopcroft, D. Pyle, A. Schmidt, and J. Staunton Sykes, 2022.Impact of climate change on volcanic processes: current understanding and future challenges. Bulletin of Volcanology. DOI: 10.1007/s00445-022-01562-8-4.


Wadsworth, F. B., E. W. Llewellin, J. I. Farquharson, J. Gillies, A. Loisel, L. Frey, E. Ilyinskaya, T. Thordarson, S. Tramontano, E. Lev, M. Pankhurst, A. Galdeano Rull, M. Asensio-Ramos, Nemesio M. Pérez, P. Hernandez Perez, D. Calvo Fernández, M. Carmen Solana, U. Kueppers, A. Polo Santabárbara, 2022.Crowd-sourced observations of volcanic eruptions: The 2021 Fagradalsfjall and Cumbre Vieja events. Nature Communications. DOI: 10.1038/s41467-022-30333-4.


Chevrel, O., Wadsworth, F., Farquharson, J., Kushnir, A., Heap, M., Williams, R., Delmelle, P. and Kennedy, B., 2022.Publishing a Special Issue of Reports from the volcano observatories in Latin America: Editorial to Special Issue on Volcano Observatories in Latin America. Volcanica. DOI: 10.30909/vol.04.S1.ivi.


Wadsworth, F. B., Vossen, C. E. J., Heap, M. J., Kushnir, A. R. L., Farquharson, J. I., Schmid, D., Dingwell, D. B., Belohlavek, L., Huebsch, M., Carbillet, L., and Kendrick, J. E., 2021. The force required to operate the plunger on a French press. American Journal of Physics. DOI: 10.1119/10.0004224.


Farquharson, J. I., A. R. L. Kushnir, B. Wild, and P. Baud, 2020. Physical property evolution of granite during experimental chemical stimulation. Geothermal Energy. DOI: 10.1186/s40517-020-00168-7.


Farquharson, J. I. and F. Amelung, 2020. Extreme rainfall triggered the 2018 rift eruption at Kīlauea Volcano. Nature. DOI: 10.1038/s41586-020-2172-5. https://github.com/jifarquharson/Farquharson_Amelung_2020_Kilauea-Nature.


Heap, M. J., M. Villeneuve, F. Albino, J.I. Farquharson, E. Brothelande, F. Amelung, J.-L. Got, and P. Baud, 2019. Towards more realistic values of elastic moduli for volcano modelling. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2019.106684.


Mordensky, S. P. , M. J. Heap, B. M. Kennedy, H. A. Gilg, M. C. Villeneuve, J. I. Farquharson and D. M. Gravley, 2019. Influence of alteration on the mechanical behaviour and failure mode of andesite: implications for shallow seismicity and volcano monitoring. Bulletin of Volcanology. DOI: 10.1007/s00445-019-1306-9. [feel free to email me for reprints].

Narock, T., E. B. Goldstein, C. A.-L. Jackson, A. A. Bubeck, A. M. L. Enright, J. I. Farquharson, A. Fernández, D. Fernández-Blanco, S. Girardclos, D. E. Ibarra, S. K. Lengger, A. W. Mackay, V. Venema, B. Whitehead, and J.-P. Ampuero, 2019. Earth Science Is Ready for Preprints. Eos. DOI: 10.1029/2019EO121347.


Farquharson, J. I., B. Wild, A. R. L. Kushnir, M. J. Heap, P. Baud, and B. Kennedy, 2019. Acid-induced dissolution of andesite: evolution of permeability and strength. JGR: Solid Earth. DOI: 10.1029/2018JB016130.


Heap, M. J., M. C. Villeneuve, A. R. L. Kushnir, J. I. Farquharson, P. Baud, and T. Reuschlé, 2019. Rock mass strength and elastic modulus of the Buntsandstein: An important lithostratigraphic unit for geothermal exploitation in the Upper Rhine Graben. Geothermics. DOI: 10.1016/j.geothermics.2018.10.003.


Mordensky, S. P., M. C. Villeneuve, J. I. Farquharson, B. M. Kennedy, M. J. Heap, and D. M. Gravely, 2018. Rock mass properties and edifice strength data from Pinnacle Ridge, Mt. Ruapehu, New Zealand. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2018.09.012. [feel free to email me for reprints].


Farquharson, J. I., and F.B. Wadsworth, 2018. Upscaling permeability in anisotropic volcanic systems. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2018.09.002.


Farquharson, J. I., and F.B. Wadsworth, 2018. Introducing Volcanica: The first diamond open-access journal for volcanology. Volcanica. DOI: 10.30909/vol.01.01.i-ix.


Mordensky, S. P., M.C.Villeneuve, B. M. Kennedy, M. J. Heap, D. M. Gravley, J. I. Farquharson, and T. Reuschlé, 2018. Physical and mechanical property relationships of a shallow intrusion and volcanic host rock, Pinnacle Ridge, Mt. Ruapehu, New Zealand. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2018.05.020. [feel free to email me for reprints].


Heap, M. J., J. I. Farquharson, A. R. L. Kushnir, Y. Lavallée, P. Baud, H. A. Gilg, and T. Reuschlé, 2018. The influence of water on the strength of Neapolitan Yellow Tuff, the most widely used building stone in Naples (Italy). Bulletin of Volcanology. DOI: 10.1007/s00445-018-1225-1.


Heap, M. J., T. Reuschlé, J. I. Farquharson, and P. Baud, 2018. Permeability of volcanic rocks to gas and water. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2018.02.00.


Farquharson, J. I., F.B. Wadsworth, M. J. Heap, and P. Baud, 2017. Time-dependent permeability evolution in compacting volcanic fracture systems and implications for gas overpressure. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2017.04.025. https://github.com/jifarquharson/FRACkR.


Heap, M.J., B.M. Kennedy, J. I. Farquharson, J. Ashworth, K. Mayer, M. Letham-Brake, T. Reuschlé, H.A. Gilg, B. Scheu, Y. Lavallée, P. Siratovich, J. Cole, A.D. Jolly, P. Baud, and D.B. Dingwell, 2017. A multidisciplinary approach to quantify the permeability of the Whakaari/White Island volcanic hydrothermal system (Taupo Volcanic Zone, New Zealand). Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2016.12.004.


Farquharson, J. I., P. Baud, and M. J. Heap, 2017. Inelastic compaction and permeability evolution in volcanic rock. Solid Earth. DOI: 10.5194/se-8-561-2017.


Farquharson, J. I., M. J. Heap, and P. Baud, 2016. Strain-induced permeability increase in volcanic rock. Geophysical Research Letters. DOI: 10.1002/2016GL071540.


Farquharson, J. I., M. J. Heap, Y. Lavallée, N. R. Varley, P. Baud, 2016. Evidence for the development of permeability anisotropy in lava domes and volcanic conduits. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2016.05.007.


Farquharson, J. I., M. J. Heap, P. Baud, T. Reuschlé, N. R. Varley, 2016. Pore pressure embrittlement in a volcanic edifice. Bulletin of Volcanology. DOI: 10.1007/s00445-015-0997-9.
Download hi-res Figure 5.


Heap, M. J., J. I. Farquharson, F. B. Wadsworth, S. Kolzenburg, and J. K. Russell, 2015. Timescales for permeability reduction and strength recovery in densifying magma. Earth and Planetary Science Letters. DOI: 10.1016/j.epsl.2015.07.053.


Farquharson, J. I., M. James, H. Tuffen, 2015. Examining rhyolite lava flow dynamics through photo-based 3D reconstructions of the 2011-2012 lava flowfield at Cordón-Caulle, Chile. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2015.09.004.


Heap, M. J., J. I. Farquharson, P. Baud, Y. Lavallée, and T. Reuschlé, 2015. Fracture and compaction of andesite in a volcanic edifice. Bulletin of Volcanology. DOI: 10.1007/s00445-015-0938-7.


Farquharson, J. I., M. J. Heap, N. Varley, P. Baud, and T. Reuschlé, 2015. Permeability and porosity relationships of edifice-forming andesites: A combined field and laboratory study. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2015.03.016.


Heap, M. J., B. Kennedy, N. Perrin, L. Jacquemard, P. Baud, J. I. Farquharson, B. Scheu, Y. Lavallée, H. A. Gilg, M. Letham-Brake, K. Mayer, A. D. Jolly, T. Reuschlé, and D. B. Dingwell, 2015. Mechanical behaviour and failure modes in the Whakaari (White Island volcano) hydrothermal system, New Zealand. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2015.02.012.


Heap, M. J., S. Kolzenburg, J. K. Russell, M. E. Campbell, J. Welles, J. I. Farquharson, A. Ryan, 2014. Conditions and timescales for welding block-and-ash flow deposits. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2014.11.010.


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