Statistical Study of Geomagnetic Storms during Year 1996-2007

Abstract:

A geomagnetic storm is a global disturbance in Earth’s magnetic field usually occurred due to abnormal conditions in the interplanetary magnetic field (IMF) and solar wind plasma emissions caused by various solar phenomenon. A study of 220 geomagnetic storms associated with disturbance storm time (Dst) decreases of more than -50 nT to -300 nT, observed during 1996-2007, the span of solar cycle 23. We have analyzed and studied them statistically. We find yearly occurrences of geomagnetic storm are strongly correlated with 11-year sunspot cycle, but no significant correlation between the maximum and minimum phase of solar cycle-23 have been found. It is also found that solar cycle-23 is remarkable for occurrence of Intense geomagnetic storm during its declining phase. The detailed results are discussed in this paper.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 268-271
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.268
• Online since: January 2012
• Authors: Balveer S. Rathore, Subhash C. Kaushik, K.K. Parashar, Rammohan S. Bhadoria, Dinesh C. Gupta
• Keywords: Disturbance Storm Time (DST), Geomagnetic Storm, Interplanetary Magnetic Field (IMF), Solar Cycle

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