On hints at micromovements, caused in the power station of Somplago (Udine) by the penstock and by the oscillations of water in the surger chamber: the former concerning almost exclusively the vertical component, the second in the form of ample tilting with an average period of 2,5^m. Other micromovements are caused by transit of microbarometrical perturbations on the overhanging mountain and further ones are of astronomical origin, particularly wide the semi-diurnal wave, associated to the lunisolar attraction. The movements are facilitated by the degree of freedom, permitted by the immediate closeness of the Cavazzo lake fault.