Goal of this work package is to provide physical models to the VFRS that allow the determination of the state of stress inside the volcano. Understanding volcanic systems is fairly difficult not only because they are build from a series of intrusive and extrusive/explosive events but also because there are a lot of still poorly understood and/or unknown internal feedback mechanisms. Structure as well as various internal feedback mechanisms may finally lead to a critical stress change in the system and culminating in an eruption.

This work package strongly builds on the seismological observations and deformation measurements in order to constrain the activity status of a volcano. In particular algorithms for event detection and classification and inversion tools for transient and quasi-continuous signals will be developed. Locating the recorded events will be based on different approaches including seismic moment tensor inversion. These results will be transferred to WP3 in order to be displayed in real time.