A report on the activities of the European Seismological Commission (ESC) during the period 1990-1992 together with the Proceedings of the General Assembly of theESC are presented in two volumes. Volume I covers the following topics: recent strong earthquakes in Europe, regional seismicity, historical earthquakes in Europe, statistical models and methods in seismology, numerical modelling in three-dimensional media, methodology of quantification of European earthquakes and recent results, seismic noise and signal detectability, regional seismic network and history of seismometry. One paper dealing with microseismic noise characteristics around the Kozloduy nuclear power plant has been inputted to INIS. (Z.S.).