The auroral activity during the main phase of magnetic storms |
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Institution: | 1. Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy, Siberian Branch, Russian Academy of Sciences, 31 Lenin ave, Yakutsk 677027, Russia;2. M.K. Ammosov North-Eastern Federal University, 58 Belinsky str, Yakutsk 677027, Russia |
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Abstract: | The relationship of auroral activity indices (AE, Kp, SME) with interplanetary medium parameters during the main phase of magnetic storms is studied. For the period 1990–2020, 142 magnetic storms driven by (41) Sheath, (61) CIR, and (40) ICME events are selected. It is found that the correlation coefficient between average values of the SME index and the SW electric field for Sheath (r = 0.75) is close to correlation coefficients for CIR and ICME events. The correlation coefficient between Kpaver&Eswaver (r = 0.72) is higher than the correlation coefficient between AEaver&Eswaver (r = 0.63) at the main phase of magnetic storms induced by the Sheath events. It is shown that average values of SW dynamic pressure and IMF σB fluctuations correlate each other for all types of SW. |
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Keywords: | Magnetic storm Auroral activity Geomagnetic index Solar wind Electric field IMF Bz |
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