Non-tidal variations of seismic-induced gravitational pulsations and their possible causes

Abstract

Introduction: Gravity pulsations were first detected when processing gravimetric stationary observations. The analysis of gravitational pulsations showed that they are most of the time associated with meteor showers. However, in some cases there is no correlation between them. For example, the most powerful of the Perseids meteor showers did not cause pulsations. This deviation from the rule was explained by the distribution of density in the meteor shower. When meteor showers hit the Earth’s atmosphere, they create fluctuations that are recorded by gravimeters. The sensor used in gravimeters and seismometers is the Golitsyn pendulum. Therefore, meteor showers have the same effect on the behaviour of seismographs. This means that seismic measurements can be used in combination with gravimetric data. When the latter are absent, it is possible to use only seismic records. Methodology: The methods of averaging and graphical selection were used to process gravimetric and seismic observations, which allowed increasing the amount of data to be processed and eliminating with reliability lunar-solar gravity variations. Results and discussion: It appeared that there exist gravity pulsations which are in no way connected with night-time showers and do not appear in the sky at night. The showers in April and September 2021 were given as examples. Currently, daytime showers can be easily detected using radio technology. Conclusions: The presence or absence of gravimetric and seismic pulsations is determined by the composition and density of dust in meteor showers. The use of gravimetric and seismic pulsations in combination with radio data will contribute to their study.