Preface Special Issue: New analytical technique for understanding volcanic systems, from magma generation to the emplacement of volcanic products

The development of new bi- and tri-dimensional (2D, 3D) analytical techniques of volcanic materials represents a new frontier in the world of modern volcanology. These advances not only offer important and reliable information on, e.g., magma vesiculation, degassing, and crystallization processes but can also shade light on the transport and sedimentation processes in volcanic flows (e.g. pyroclastic density currents, volcanic clouds). Hence, these novel approaches have the potential to contribute both to the understanding eruption dynamics towards volcanic hazard quantification.