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North–South asymmetry of solar activity during Cycle 23

Show simple item record Joshi, B. Pant, P. Manoharan, P. K. Pandey, K. 2009-07-02T08:41:32Z 2009-07-02T08:41:32Z 2007
dc.description.abstract In this paper, we have made a statistical analysis of solar Hα flares that occurred during the period 1996 to 2005 to investigate their spatial distribution with respect to northern and southern hemispheres of the Sun. The analysis includes a total of 21608 single events. The study shows a significant N−S asymmetry which is persistent with the evolution of the solar cycle. The flare activity favors the northern hemisphere in general during the rising and maximum phase of the solar cycle (i.e., in 1997, 1999, and 2000), while the declining phase (i.e., from 2001 to 2005) shows a southern dominance. Further, the monthly N−S asymmetry index for flares, sunspot numbers and sunspot areas suggests similar variations for these phenomena with the progress of solar cycle. We also find that in terms of asymmetric behavior of solar flares, cycle 23 seems to act quite differently from cycle 22 but comparably to cycle 21. en_US
dc.language.iso en_US en_US
dc.relation.ispartofseries asp368-539
dc.subject Solar Activity, Solar Storms, Active Sun, Sunspots en_US
dc.title North–South asymmetry of solar activity during Cycle 23 en_US
dc.type Article en_US

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