The IAVCEI Commission on Tephra Hazard Modelling (THMC) was established in 2003 to advance the quantitative understanding of tephra hazards through numerical models and field data. Over the past 20 years, the Commission has actively organised workshops and symposia, and has fostered collaboration among numerical modelers, field geologists, and operational forecasters from volcano observatories and Volcanic Ash Advisory Centers (VAACs).
Leadership
The current leaders of the Commission are:
- Dr. Alastair Hodgetts (University of Edinburgh, UK)
- Dr. Alice Paine (University of Basel, Switzerland)
- Prof. Thomas Aubry (University of Oxford, UK)
- Dr. Marija Voloschina (University of Pisa, Italy)
- Dr. Audrey Michaud-Dubuy (Université Clermont Auvergne, France)
We also receive valuable support from one of our former co-leads, Dr. Paul Jarvis (Earth Sciences New Zealand), who assists with organising seminars.

Dr. Alastair Hodgetts
(he/him)
Co-chair THMC
Email: alastair.hodgetts@ed.ac.uk; alastairhodgetts@outlook.com
Personal Website: Alastair Hodgetts
Alastair is a physical volcanologist and geologist at the University of Edinburgh, UK. His research is focused on the reconstruction of past eruptions and their processes to better understand a volcano(es) history and future hazards. Alastair has experience in field geology, stratigraphy, geochemistry, geochronology, petrology and numerical modelling and has worked in both academic and government environments. Through his research, Alastair aims to better understand explosive volcanism with a goal to gain knowledge that will ultimately save lives.

Dr. Alice Paine
(she/her)
Co-chair THMC
Email: alice.paine@unibas.ch
Personal Website: Alice Paine
Alice is a post-doctoral researcher at the University of Basel, Switzerland. Her research integrates concepts from paleoclimatology, volcanology, oceanography, and geochemistry (among other disciplines) to better understand the causes of past shifts in the Earth’s climate, the impact(s) of explosive volcanic eruptions, and how we can use geochemical proxies sourced from records such as stalagmites, ice cores, and lake sediments to refine the timescales, causes, and expressions of global change.

Prof. Thomas Aubry
(he/him)
Co-chair THMC
Email: thomas.aubry@earth.ox.ac.uk; thom.aubry@gmail.com
Personal Website: Thomas Aubry
Thomas is a physical volcanologist and climate scientist at the University of Oxford, UK. His research is focused on the dynamics and dispersion of volcanic plumes, and on interactions between climate and volcanic eruptions. He uses numerical modelling, observations, and laboratory experiments to address his research questions. When not thinking about volcanoes or climate, hiking, kayaking, surfing, and running are some of his favourite activities.

Dr. Marija Voloschina
(she/her)
Co-chair THMC
Email: marija.voloschina@dst.unipi.it
Personal Website: Marija Voloschina
Marija is a volcanologist at the University of Pisa, Italy. Her research focuses on reconstructing eruption dynamics, magma ascent mechanisms and magmatic processes from pyroclastic deposits. She combines field studies, physical volcanology and geochemistry with monitoring data for hazard assessment and mitigation.

Dr. Audrey Michaud-Dubuy
(she/her)
Co-chair THMC
Email: audrey.michaud-dubuy@uca.fr
Personal Website: Audrey Michaud-Dubuy
Audrey is a physical volcanologist and geologist at the Université Clermont Auvergne, France. Her research focuses on the dynamics of volcanic plumes and the reconstruction of past eruptions, with the aim of assessing volcanic hazards. She employs a range of methods, including numerical modeling, field geology, laboratory experiments, and satellite observations. Her main goal is to bridge academic research and societal challenges, especially on volcanic islands.