The TOMO-ETNA experiment was devised to image of the crust under- lying the volcanic edifice and, possibly, its plumbing system by using pas- sive and active refraction/reflection seismic methods. This experiment included activities both on-land and offshore with the main objective of obtaining a new high-resolution seismic tomography to improve the knowledge of the crustal structures existing beneath the Etna volcano and northeast Sicily up to Aeolian Islands