High-frequency oscillations of non-tidal seismic-gravitational pulsations

Abstract

Introduction: The sensor for gravimeters and seismographs is the Golitsyn pendulum, which allows more full interpretation of the data of seismo-gravimetric measurements. In the identification of pulsations, the main inconvenience arises when lunar-solar gravity variations (mainly for seismic observations) are taken into account. However, this question is relatively easy to solve using the averaging method. As the accuracy of measurements increases and the intervals of discreteness of observations decrease, it becomes possible to study the spectral characteristics of the high-frequency part of the observations. Methodology: For comparison, days where pulsations are clearly manifested, and days when there are no pulsations or they are minimal were selected. Since the pulsations are global in nature, seismogravimetric observations were taken at different points on the globe (Black Forest, Germany and Arti, Russia). Discussion: Spectral analysis was carried out for these stations and the following results were obtained. Amplitude spectra were used for the evaluation of the analysis. The main carrier frequency is a frequency with a period within 5 – 9 s. A clear relationship between the frequency and amplitude of pulsations was noted.