The study of sunspots and K-index data in the perspective of probability distributions

D Hassan, S Abbas, MRK Ansari… - International Journal of …, 2014 - indianjournals.com
International Journal of Physical and Social Sciences, 2014indianjournals.com
As we know that sunspots cycles varies with the variation of the magnetic field of the Sun,
the average sunspots cycle is 11-years while one solar magnetic cycle ranges over 22-
years. This means that each solar magnetic cycle contains two sunspots cycles. After each
11 years the magnetic poles change their polarity ie the north pole becomes south pole and
vice versa. This paper utilizes the sunspots data from 1747 to 2011 (24 cycles) and K-index
data from 1932 to 2011. We will analyze the sunspots data and K-index data using …
As we know that sunspots cycles varies with the variation of the magnetic field of the Sun, the average sunspots cycle is 11-years while one solar magnetic cycle ranges over 22-years. This means that each solar magnetic cycle contains two sunspots cycles. After each 11 years the magnetic poles change their polarity i.e. the north pole becomes south pole and vice versa. This paper utilizes the sunspots data from 1747 to 2011 (24 cycles) and K-index data from 1932 to 2011. We will analyze the sunspots data and K-index data using probability distributions. We will stress upon the study of variations of the type of probability distributions. These include Normal, Gamma, Lognormal, Hypersecant and Chi-square distributions which are tested with the help of Kolmogorov-Smirnov D-test. Further more, we will cycle wise compare the probability distributions of Sunspots and K-index data (geomagnetic indices). We compared the two sunspots cycles data with a single K-index cycle data in the perspective of probability distributions. The adequacy of the distribution of sunspots and K-index cycle represents the possibility of suitable probability distribution for the next cycles.
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