Synchronicity of seismic-induced gravity pulsations
Abstract
Introduction: Gravity pulsations were first detected when processing stationary observations at the Geodynamic Polygon of the Russian Academy of Sciences in Bishkek (2014). It appeared that the same pulsations were characteristic of seismic vibrations, which synchronously coincided with gravimetric pulsations. Methodology: Seismic and gravimetric observations are complicated by the influence of the moon and the sun. When processing the data, the main task is to eliminate this effect. Lunar-solar influence can be eliminated by theoretical calculation of lunar-solar variations of gravity and their temporal gradient. Moreover, seismic and gravimetric measurements are influenced by atmospheric pressure and air temperature. Meteorological disturbances are eliminated using the method of averaging. Results and discussion: The analysis of seismic-induced gravity pulsations on different continents showed that the pulsations are completely synchronous with each other. Such synchronicity is characteristic mostly of the intracontinental stations. Thus, based on the study of seismic-induced gravity pulsations, it can be argued that there are two types of pulsation sources. The first type of pulsation is associated with impacts of meteor showers on the Earth’s atmosphere, which has a planetary nature. In the coastal regions and in the ocean, there are additional pulsations caused by atmospheric processes (typhoons, cyclones, etc.) Conclusions: The obtained results can be used further to study the internal structure of the Earth, to determine the power of meteor showers, and increase the accuracy of gravimetric measurements.
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References
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