Abstract
In the present study, we have investigated the association of geomagnetic storms (GSs) with solar interplanetary features, i.e solar wind speed (Vsw), interplanetary magnetic field (IMF B), product of IMF B and Vsw, solar plasma temperature (Tsp), Ap index & Kp index, for the rising phase of solar cycle 25 (study period 2020 to 2023). From the results of the analysis, it is observed that the product of solar wind velocity and interplanetary magnetic field is highly geoeffective compared to solar wind velocity or interplanetary magnetic field alone. The correlation coefficient of geomagnetic storm indicator index Dst with these parameters has been found to be high and negative during the study period. There have been also the correlations between solar wind speed and Dst (-0.59), the interplanetary magnetic field (-0.87), the product of the interplanetary magnetic field and solar wind (-0.95), solar plasma temperature (-0.69), Ap index (-0.85) and the Kp index (-0.87). Finally, we have found out that geomagnetic storms occur on the same day when the product of the interplanetary magnetic field (IMF B), solar wind speed (Vsw), interplanetary magnetic field (IMF B) and solar wind speed (Vsw), solar plasma temperature (Tsp), Ap index and Kp index reach their peaks. On this basis the study of geomagnetic storms with various solar interplanetary features can be useful for the study of space weather phenomena.
Keywords: – Geomagnetic Storm, Interplanetary Magnetic Field, Solar Wind, Solar Cycle 25.
Vindhya Shrivastava1*, Deepak K Chaurasiya2, Pankaj K Shrivastava3