  The Summit Craters system represents the point of maximum expression of the
persistent tectonic activity at Mount Etna Volcano. The Muography of Etna
Volcano (MEV) Project began in 2016 as a pilot project for the successive
installation of a permanent muographic observatory. It aims to demonstrate the
detector's capability to observe density anomalies inside the volcanic edifice
and monitor their time evolution. The first muon telescope built by the
collaboration and installed at the base of the North-East Crater from August
2017 to October 2019 was already able to get significant results. This work
describes the characteristics of the muon-telescope and summarizes the
principal outcomes obtained, with a quick look at the current status of the
project and future developments.
