Geomagnetic storms in relation to interplanetary magnetic fields and southward component of interplanetary magnetic field during solar cycle 24

Abstract   

We have analyzed geomagnetic storms Dst  ≤-50nT observed during the period of solar cycle 24 with disturbances in interplanetary magnetic fields (IMF) and southward component of interplanetary magnetic field (IMFBz) .We have determined that all the geomagnetic storms have been found to be associated with disturbances in interplanetary magnetic fields (IMF).Positive correlation with correlation coefficient 0.57 has been found between magnitude of geomagnetic storms and maximum value of disturbances in IMF. Positive correlations with correlation coefficient 0.52 have also been found between magnitude of geomagnetic storms and magnitude of disturbances in IMF. Further all the geomagnetic storms have been found to be associated with disturbances in southward component of interplanetary magnetic fields (IMFBz).Large  positive correlation with correlation coefficient 0.70 has been found between magnitude of geomagnetic storms and maximum value of disturbances in southward component interplanetary magnetic fields (IMFBz) .Large positive correlations with correlation coefficient 0.66 have also been found between magnitude of geomagnetic storms and magnitude of disturbances in southward component of interplanetary magnetic fields ( IMFBz),

Keywords: – Geomagnetic storms, Interplanetary magnetic fields (IMF) and southward component of interplanetary magnetic fields (IMFBz).

Dolly Ochani^1*, Shubha Singh Parihar², P. L. Verma^3*