IJAR - Indian Journal of Applied Research

Omkar Prasad Tripathi; Varinder Pandey; P.L.Verma

Volume : IX, Issue : VI, June - 2019

Co–relational Analysis of SWP Parameters with Geomagnetic Field Disturbances during Growing Stage of Solar Cycle 24

Omkar Prasad Tripathi, Varinder Pandey, P. L. Verma

Abstract :

Disturbances in geomagnetic field are extremely affected by sun’s behavior like solar and interplanetary parameters. For this, we have studied 38 geomagnetic storms (DST ≤ – 75nT) and observed that the more effective events of solar wind plasma parameters during growing stage of solar cycle 24. In present study, we have found positive correlation between the magnitude of geomagnetic storms and initial value of solar wind plasma parameters corresponding to the onset time of initial phase with correlation coefficient 0.56 between magnitude of geomagnetic storms and onset value of solar wind plasma temperature, 0.54 between magnitude of geomagnetic storms and onset value of solar wind plasma density, 0.68 between magnitude of geomagnetic storms and onset value of solar wind plasma velocity, 0.75 between magnitude of geomagnetic storms and onset value of solar wind plasma pressure, 0. 59 between magnitude of geomagnetic storms and onset value of interplanetary magnetic field (B). We have also determined the positive co–relation between geomagnetic storms and onset value of Ap–index and Kp–index at a time of initial phase of geomagnetic storms with correlation co–efficient 0.88 and 0.78 respectively.