DefVolc terms of use

DefVolc is a software for inverse modeling of volcano displacement data (InSAR, GNSS), whether the sources of displacement are fracture (fluid filled fracture or faults) or massive reservoirs. DefVolc is based on a 3D Boundary element method for elastic media combined with inversions, based on near-neighborhood inversion algorithms.

To be able to subscribe, you need a Project code. It can be obtained upon request by contacting Valerie Cayol ( Alternatively, if you want to run the inversions on your own cluster, simply login with the Project code "anonymous".


To run the DefVolc pre and post-processor, you will need a computer with linux x86-64 and a version of gmsh more recent than 2.10.1.

You will need to install matlab Runtime corresponding to matlab version R2018b (

To run inversions on your machine you will need a cluster but you can also run them on University Clermont Auvergne Mesocenter ( using the following web interface.

By continuing you agree to the following terms of use:

In no event, shall the authors be liable for any claims, damages or other liability arising from, out or in connection with the use of defvolc.

Citations and acknowledgments

When communicating results generated by defvolc, one must quote the defVolc tools :

Cayol, V., Yo Fukushima, Farshid Dabaghi, Olivier Bodart, Marine Tridon, Delphine Smitarello, Quentin Dumont, Jean-Luc Froger, Christelle Wauthier, Cyprien Cattelain, C. Gouinaux, DefVolc : tools for 3D inverse modelling of deformation data,

One must also include, where appropriate, citations to the following publications :

Cayol, V., et F. H. Cornet, 3D Mixed Boundary Elements for Elastic Deformation Field Analysis, Int. J. Rock Mech. Min. Sci. & Geomech. Abstr., 34, 275-287, 1997.

Fukushima Y., V. Cayol and P. Durand, Finding realistic dike models from interferometric synthetic aperture radar data: The February 2000 eruption at Piton de la Fournaise, J. Geophys. Res., 110, B03206,doi: 10.1029/2004JB003268, 2005.

If the computer resources provided by University Clermont Auvergne were used to run inversions, please, please acknowledge them in the acknowledgment section of the publication, with the following sentence :

" We are grateful to the Mesocentre of the University Clermont Auvergne ( for providing help and/or computing and/or storage resources."