ABSTRACT
Long-term monitoring of rock movements provides chance to meet cycles, trends and impulses in records. If detected, they are of special interest, because they characterise the deformation process in the massif and allow to look for correlation with other factors. The phenomena like impulses are more frequent than expected generally. There are many reasons for leaving them unnoticed because of insufficient frequency of measurement, improper treatment of data, and incomplete records that do not include all the deformation components in space. Angular deviations may be of high value. Examples are given showing seasonal cycles, creep trends and impulses induced by quarry blasting but also those of natural origin.
