Relationship between substorm activity and the interplanetary medium parameters during the main phase of strong magnetic storms
| Autor: | R.N. Boroyev |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Geomagnetic storm
Physics Atmospheric Science 010504 meteorology & atmospheric sciences Correlation coefficient Aerospace Engineering Interplanetary medium Astronomy and Astrophysics Storm Geophysics 01 natural sciences Solar wind Space and Planetary Science Electric field 0103 physical sciences Substorm General Earth and Planetary Sciences Interplanetary magnetic field 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
| Zdroj: | Advances in Space Research. 63:302-308 |
| ISSN: | 0273-1177 |
| DOI: | 10.1016/j.asr.2018.09.001 |
| Popis: | In the present paper dependences of substorm activity on the solar wind velocity and southward component (Bz) of interplanetary magnetic field (IMF) during the main phase of magnetic storms, induced by the CIR and ICME events, is studied. Strong magnetic storms with close values of Dstmin ≈ −100 ± 10 nT are considered. For the period of 1979–2017 there are selected 26 magnetic storms induced by the CIR and ICME (MC + Ejecta) events. It is shown that for the CIR and ICME events the average value of the AE index (AEaver) at the main phase of magnetic storm correlates with the solar wind electric field. The highest correlation coefficient (r = 0.73) is observed for the magnetic storms induced by the CIR events. It is found that the AEaver for magnetic storms induced by ICME events, unlike CIR events, increases with the growth of average value of the southward IMF Bz module. The analysis of dependence between the AEaver and average value of the solar wind velocity (Vswaver) during the main phase of magnetic storm shows that in the CIR events, unlike ICME, the AEaver correlates on the Vswaver. |
| Databáze: | OpenAIRE |
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