Impact of solar wind parameters on geomagnetic activity during the main phase of strong magnetic storms

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2025-02-28 DOI:10.1016/j.jastp.2025.106485

R.N. Boroyev

引用次数: 0

Abstract

The relationship between the mean values of auroral activity indices and SW parameters during the periods of strong magnetic storms (|Dst_min| = 100 ± 10 nT) induced by SW different types is studied. 24 magnetic storms induced by (6) Sheath, (9) CIR, and (9) ICME events are selected for the period 1990–2020. It is shown that the against the background of the dependence of the auroral activity indices (AE, Kp and SME) on the SW electric field, the value of AE, Kp and SME indices is impacted by the IMF σВ. The geomagnetic indices increase with growth of the IMF σB magnitude. It is found that Sheath events have high geomagnetic index values in contrast to CIR and ICME. The SW type determines the relationship between geomagnetic indices and IMF σВ. The coefficient of correlation between IMF σB and Pd for Sheath (r = 0.65) has a close value with the correlation coefficients for the CIR and ICME events.

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来源期刊

Journal of Atmospheric and Solar-Terrestrial Physics 地学-地球化学与地球物理

CiteScore

4.10

自引率

5.30%

发文量

审稿时长

6 months

期刊介绍： The Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) is an international journal concerned with the inter-disciplinary science of the Earth''s atmospheric and space environment, especially the highly varied and highly variable physical phenomena that occur in this natural laboratory and the processes that couple them. The journal covers the physical processes operating in the troposphere, stratosphere, mesosphere, thermosphere, ionosphere, magnetosphere, the Sun, interplanetary medium, and heliosphere. Phenomena occurring in other "spheres", solar influences on climate, and supporting laboratory measurements are also considered. The journal deals especially with the coupling between the different regions. Solar flares, coronal mass ejections, and other energetic events on the Sun create interesting and important perturbations in the near-Earth space environment. The physics of such "space weather" is central to the Journal of Atmospheric and Solar-Terrestrial Physics and the journal welcomes papers that lead in the direction of a predictive understanding of the coupled system. Regarding the upper atmosphere, the subjects of aeronomy, geomagnetism and geoelectricity, auroral phenomena, radio wave propagation, and plasma instabilities, are examples within the broad field of solar-terrestrial physics which emphasise the energy exchange between the solar wind, the magnetospheric and ionospheric plasmas, and the neutral gas. In the lower atmosphere, topics covered range from mesoscale to global scale dynamics, to atmospheric electricity, lightning and its effects, and to anthropogenic changes.