Abstract
Comparison of wavelet spectrum (skeletons) local maxima for disturbed components of solar plasma flow parameters and geomagnetic field disturbances recorded along the meridional station chain during geomagnetic storm intervals is performed in the range of magnetohydrodynamic (MHD) waves. An algorithm for quantitative evaluation of analyzed skeletons consistency has been developed. It has been used to demonstrate the possibility of the type of solar wind plasma flow elaboration on unique spectral signs of Solar wind speed disturbances, density and interplanetary magnetic field. It is shown that the energy spectrum of oscillations for these parameters reflects the internal structure of the corresponding plasma formation. The skeletons application to the analysis of the interplanetary space main parameters made it possible to estimate the magnetosphere reaction time in geomagnetic field horizontal component oscillations at different latitudes on the disturbance. As a result, the distributed magnetosphere reaction over latitude was determined in the form of geomagnetic field oscillations on the disturbed solar flow parameters. It is shown that the dynamics of the components of the solar wind parameters disturbance spectra corresponding to plasma flows manifest themselves in the MHD spectra of high-latitude stations magnetograms and can be used as a diagnostic tool.
Highlights
A parallel analysis of postprocessing results for wavelet components of low-frequency magnetohydrodynamic (MHD) disturbed solar wind plasma flows parameters and geomagnetic field horizontal component disturbances recorded along the meridional stations chain during different geomagnetic storms was performed
Based on physical considerations, it should be expected that the components dynamic for disturbance spectra of the solar wind plasma flows parameters manifest themselves in the MHD spectra of high-latitude stations magnetograms
With the help of a computational tool created on the basis of an algorithm, the disturbance spectra reflection of solar wind parameters corresponding to plasma flows in the spectra of observatory magnetograms is demonstrated
Summary
A parallel analysis of postprocessing results for wavelet components of low-frequency magnetohydrodynamic (MHD) disturbed solar wind plasma flows parameters and geomagnetic field horizontal component disturbances (geomagnetic pulsation range) recorded along the meridional stations chain during different geomagnetic storms was performed. At the same time it is known that low-frequency (LF) oscillations part of the solar wind parameters penetrates into magnetosphere and appears there in magnetograms recordings of ground-based observatories [1] This is possible when conditions for the transition region lightening up beyond the earth’s shock wave are created for them [2]. This is necessary for performing the second part of the study in which the type of disturbed solar wind flow coming up to the magnetosphere It was established on the base of wavelet spectra components analysis of the geomagnetic field along the high-latitude section of the meridional station chain and parameters of the near-earth space environment. The special attention at the same time is paid to the high-latitude geomagnetic region, where the configuration of the geomagnetic field lines allows direct penetration of LF oscillations from the solar wind into the earth's magnetosphere
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