Problems of synchronism of electromagnetic and seismic events in the magnetosphere-technosphere-lithosphere dynamic system

The study deals with problems of the anthropogenic effect on the magnetosphere and lithosphere. These effects are not so significant but they are of great interest both for solar-terrestrial physics and for seismology. The purpose of the study is to attract attention of geophysicists to complicated problems of interpretation of the weekend and hour-mark effects which can be detected in weekly and 15-minute modulation of Pc1 magnetospheric oscillations and earthquakes. Basic information of the weekend and hour-mark effects is presented. A special attention is given to search for periodicities attributed to operation of technological systems. It is assumed that these periodicities may be responsible for the effects mentioned above. We have analyzed long data sets taken from Pc1 and earthquake catalogues, as well as catalogues on electric power consumed by large industrial region and on lightning discharges. It is the first time hidden periodicities in industrial activity which probably cause the weekend and hour-mark effects have been determined. The main conclusion is that technosphere action on the magnetosphere and lithosphere is evident and can be analyzed by the synchronous detection method. The question of specific mechanisms of such action remains open.