Study the Effect of Magnetic Clouds on Geomagnetic Indices during Period 2007
S. G. Singh *
Department of Physics, Govt. Chhatrasal P.G College, M.P, 488001, India.
Subhash Chandra Chaturvedi
Department of Physics, Govt. Lahiri College, Chirimiri (Koriya) C.G, India.
Achyut Pandey
Department of Physics, Govt. T.R.S College, Rewa, M.P, 486001, India.
N. K. Patel
Department of Physics, Govt. Chhatrasal P.G College, M.P, 488001, India.
P. R. Singh
Department of Physics, Govt. Chhatrasal P.G College, M.P, 488001, India.
*Author to whom correspondence should be addressed.
Abstract
The magnetic clouds event is a large scale interplanetary structure produced due to transient ejections in ambient solar wind. Several researchers investigate time to time to derive effect of magnetic clouds on geomagnetic field as well as cosmic rays [1]. Mishra, et. al. [2] studied effects of magnetic clouds event on geomagnetic field & cosmic rays for 3 various conditions. They have concluded that magnetic clouds associated with turban shock produce large cosmic ray intensity decreases & geomagnetic field variations. Several studies indicate a correlation in-between geomagnetic activity & southward element of interplanetary magnetic field [3]. In this study we have taken 3 & 5 events of magnetic clouds for years of 2006 & 2007. A chree study of super epocs procedure has been adopted to effects of magnetic cloud events on geomagnetic activity on short term basis. The results of chree study for taking daily value of geomagnetic Dst index for -5 to+10 days. This study has been done for both years of 2006 & 2007. Zero days are taken on arrival time of magnetic cloud events. Large decreases in Dst value for both years are seen. It indicates significant enhancement in geomagnetic field of earth due to influence of magnetic clouds. For further analysis, we have taken few magnetic clouds events to observe there association with interplanetary & geomagnetic indices.
Keywords: Interplanetary Magnetic Field (IMF), magnetic cloud, Dst index, Plasma Temperature (T), Proton density (D), Plasma speed (V)
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References
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