IAVCEI communications & announcements
Special volume in the Journal of Volcanology and Geothermal Research
The Commission supported a special volume in the Journal of Volcanology and Geothermal Research presenting results of the eruption column model inter-comparison study. View the special issue here. The accurate description of the dynamics of convective plumes developed during explosive volcanic eruptions represents...
THM Commission sponsored a scientific symposium
The THM Commission sponsored a scientific symposium at the Cities on Volcanoes 2018 meeting in Naples, Italy. Session S01.26 Volcanic ash: from monitoring to impacts. Conveners: Takahiro Miwa | National Res. Inst. for Earth Science and Disaster Resilience (NIED), Costanza Bonadonna | Université de Genève, Nobuo Geshi...
IAVCEI workshop on Santorini Volcano
IAVCEI workshop on Santorini Volcano, organised jointly by the Commission on Explosive Volcanism and the Commission on Tephra Hazard Modelling, and associated with Cities on Volcanoes 2020. DUE TO COVID-19, THIS MEETING HAS BEEN CANCELED. WE ARE WORKING ON OTHER OPTIONS...
Working Group on Eruption Source Parameters
A new Working Group on Eruption Source Parameters has formed. Learn more here.
IVESPA database
Open-source article published in JVGR documenting results of the Working Group on Eruption Source Parameters and the new IVESPA database
The THM Commission is co-organizing a scientific symposium
The THM Commission is co-organizing a scientific symposium at the Fall AGU meeting entitled “Tephra, volcanic processes, and hazards: A session in honor of Don Mullineaux”. Abstracts are due August 4th and details can be found here.
Latest Newsletter
About THM IAVCEI Commission
The IAVCEI Commission on Tephra Hazard Modelling (THM) was established in 2003 to advance the quantitative understanding of tephra hazards through numerical modelling and field data. Over the past 15+ years, the Commission has organised workshops and symposia, and strengthened collaboration among numerical modellers, field geologists, and operational forecasters from VAACs and volcano observatories.
Our work has produced several notable outcomes, including:
- a benchmark dataset for validating volcanic tephra sedimentation models;
- scientific recommendations for collecting the largest clasts in tephra deposits to help determine plume height;
- a consensus document from two IUGG–WMO workshops on volcanic ash and aviation (2010, 2013); and
- a Journal of Volcanology and Geothermal Research special issue on eruption column model intercomparison.
We are currently leading a Geological Society of London / AGU GeoHorizons volume titled Tephra: From Reconstructing Past Volcanic Eruptions to Modelling and Forecasting Future Hazards.





