Relation between Solar Wind Parameter  and Geomagnetic Storm Condition  during Cycle-23

Balveer S. Rathore; Dinesh C. Gupta; K. K. Parashar

doi:10.4236/ijg.2014.513131

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International Journal of Geosciences > Vol.5 No.13, December 2014

Relation between Solar Wind Parameter and Geomagnetic Storm Condition during Cycle-23 ()

Balveer S. Rathore^*, Dinesh C. Gupta, K. K. Parashar

School of Study in Physics, Jiwaji University, Gwalior, India.

DOI: 10.4236/ijg.2014.513131 PDF HTML XML 4,063 Downloads 4,845 Views Citations

Abstract

In the present paper dependence of geomagnetic activity on the solar-wind plasma and interplanetary magnetic field (IMF) parameters has been studied. We have taken interplanetary solar wind data at the instant of Dst minimum. Our study consists of 200 geomagnetic storms weighed by disturbance storm time (Dst) < -50 nT, observed during solar cycle 23. The study suggests that the strength of the geomagnetic storm is strongly dependent on the total magnetic field B_total. The correlation (-0.72) has been found reasonable. In perspective of previous studies, the strength of the geomagnetic storm is strongly dependent on the southward component (Bz) whereas in present study exposes that the correlation (0.22) is weak. This result indicates that solar wind southward magnetic field component Bz has significant growth particularly before the main phase of geomagnetic storm (not during the main phase). The present result implies that neither density nor temperature is significantly related to the variation of geomagnetic disturbance; rather the effects of the pressure and speed. However, a low plasma beta during highly geoeffective event seems to be an important criterion.

Keywords

Geomagnetic Storm, Interplanetary Magnetic Field (IMF), Disturbance Storm Time (Dst), Solar Cycle

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Rathore, B. , Gupta, D. and Parashar, K. (2014) Relation between Solar Wind Parameter and Geomagnetic Storm Condition during Cycle-23. International Journal of Geosciences, 5, 1602-1608. doi: 10.4236/ijg.2014.513131.

Conflicts of Interest

The authors declare no conflicts of interest.

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