Welcome to the new THM IAVCEI Commission website

The IAVCEI Commission on Tephra Hazard Modelling (THM) was born in 2003 to improve our quantitative understanding of tephra hazards using numerical models and field data. Over the past ~15 years, the commission has actively organized workshops, symposia, and fostered communication among numerical modelers, field geologists, and operational forecasters from the VAACs and observatories. A few of the notable outcomes include: a dataset for the validation of Volcanic Tephra Sedimentation models, scientific recommendations for collecting the largests clasts of tephra deposits for the determination of plume height, a consensual document from two IUGG-WMO workshops on volcanic ash and aviation (2010, 2013), and a JVGR special issue on eruption column model inter-comparison.

The main goals of the commission are to:
  1. Calibrate existing tephra-dispersal models;
  2. Identify potential improvements to existing models that would increase precision and accuracy;
  3. Compile a comprehensive dataset for modeling validation;
  4. Define a tephra-sampling protocol in order to standardize tephra collection and quantify the accuracy of eruptive parameters derived from field data;
  5. Determine feasibility of running specific models on different types of computer systems, such as individual personal computers, parallelized clusters, or remote servers using an internationally accessible Web-based interface;
  6. Present the results in a framework that allows new research to be incorporated into analytical and numerical models for tephra hazard assessments.

Latest THM News

Stay up-to-date with the latest news from teh Commission

Useful links

A list of IAVCEI links to official sites and resources

What we do

The Commission works in the frame of IAVCEI activities, focusing on...

Who we are

The Commission is formed by three co-leaders and working groups

List of Publications

A list of publications, books and data produced by the community