The analysis of daily dynamics of geomagnetic field variations spectrum under quiet and disturbed conditions

Abstract

Abstract The results of static analysis of measurement records of three components of the Earth's magnetic field obtained at the Alma-Ata Observatory [43.25°N; 76.95°E] are presented. The daily dynamics of the spectrum of measurements of the parameters of the geomagnetic field obtained by adding the spectra of magnetically quiet days with a maximum daily Ap index of less than 5 for the period from 2010 to 2018 was considered. Regular fluctuations in the range of acoustic-gravity waves are revealed. The power spectrum of measurement records of three magnetic field components during a geomagnetic storm (Kp = 8) and under quiet geomagnetic conditions (Kp = 2) was also studied.