Volume 4 Issue 3
Aug.  1984
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Sun Kai, Cheng Xin-hua, Ming Yue-hong, Jing Ju-ling, Wang Xu Li, Zhi-ping, Li Hong. Solar Activity and Variation of Geomagnetic Disturbance[J]. Journal of Space Science, 1984, 4(3): 216-221. doi: 10.11728/cjss1984.03.216
Citation: Sun Kai, Cheng Xin-hua, Ming Yue-hong, Jing Ju-ling, Wang Xu Li, Zhi-ping, Li Hong. Solar Activity and Variation of Geomagnetic Disturbance[J]. Journal of Space Science, 1984, 4(3): 216-221. doi: 10.11728/cjss1984.03.216

Solar Activity and Variation of Geomagnetic Disturbance

doi: 10.11728/cjss1984.03.216
  • Received Date: 1983-09-02
  • Rev Recd Date: 1900-01-01
  • Publish Date: 1984-08-24
  • The events of which geomagnetic indices C9s are all larger than L (L is a constant) are noticed. The number of times of the events in a year is taken to express the level of geomagnetic disturbance of the year. Six cases are studied:L=3, 4 and 5; each of them is subdivided into two subcases: recurrent events and general events.The method of the curve fitting with piecewise polynomials is used to derive an averaged experimental relationship f(R) between the number of times in a year Ck and the sunspot relative number Rk (k is the order of the years from 1980 to 1979). Then, △k = Ck - fk (fk = f(Rk)) are calculated. The result shows that: 1, for the 'solar cycles', each of which begins at he year four years before the minimum of the cor responding solar cycle, the signs of the average values of △k alternate, ('sign alternating' fule +,-,+,-,......); 2. the 'sign alternating' rule oceurs in all the six subcases. It is mostly likely that the rule is caused by thereversal of the solar polar fields. After a further dividing of the 'cycles', every cycle has own dispersity (o) about its averaged △, △. The sequence of a shows a long term period of about 70 years.

     

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