Volume 36 Issue 1
Jan.  2016
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LU Yangping, ZHAO Haofeng, LE Guiming, YIN Zhiqiang, CHEN Minhao, LI Zhongyi. Analysis of the Properties of Solar Active Regions and the Solar Flares during 1996—2008ormalsize[J]. Journal of Space Science, 2016, 36(1): 12-17. doi: 10.11728/cjss2016.01.012
Citation: LU Yangping, ZHAO Haofeng, LE Guiming, YIN Zhiqiang, CHEN Minhao, LI Zhongyi. Analysis of the Properties of Solar Active Regions and the Solar Flares during 1996—2008ormalsize[J]. Journal of Space Science, 2016, 36(1): 12-17. doi: 10.11728/cjss2016.01.012

Analysis of the Properties of Solar Active Regions and the Solar Flares during 1996—2008ormalsize

doi: 10.11728/cjss2016.01.012
  • Received Date: 2015-06-17
  • Rev Recd Date: 2015-09-12
  • Publish Date: 2016-01-15
  • The total number of solar Active Regions (AR) Nt that occurred during 1996—2008 is 3067. And 58.52% of the Nt are the AR with the area satisfying the condition 10μh ≤ S≤90μh, 31.43% of the Nt are the AR with the area satisfying the condition 100μh ≤ S≤490μh. The AR with area S≥500μh only accounted for about 6% and the ARs with area S≥1000μh only accounted for about 1% of the total AR. The AR with area being 0 accounted for 4.01%. For each year during 1996—2008, the ratio of AR with different area S to the total number of AR usually reached its maximum at the time several years after solar maximum except the AR with area S≤ 50μh. The number that can produce at least one solar X-ray flare during 1997—2008 is 1408. The total number of C-class flares is 7706, while the total number of M-class flare is 1141 and the total number of X-class flare is 110 during 1997—2008. The sum of time integral of X-ray flux in 1~8Å produced by all C-class, M-class and X-class flares are 22.711, 29.443 and 36.178 J·m-2. The Soft X-Ray (SXR) flare activities in the southern hemisphere are stronger that in the northern hemisphere during Solar Cycle 23.

     

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