Preface to the volume 'One small step to further our knowledge of the solid Earth'

This is the twenty-second volume collecting a group of selected papers presented during the annual national conference of the Gruppo Nazionale di Geofisica della Terra Solida (GNGTS) published in the Bollettino di Geofisica Teorica ed Applicata (BGTA, now Bulletin of Geophysics and Oceanography BGO). It may be considered a sort of summary of the novelties arising during the congress.