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- Title
Statistical properties of X-class flares and their relationship with super active regions during solar cycles 21-23.
- Authors
Le, Guiming; Yang, Xingxing; Liu, Yonghua; Li, Peng; Yin, Zhiqiang; Chen, Yulin
- Abstract
We investigate the statistical distribution of X-class flares and their relationship with super active regions (SARs) during solar cycles 21-23. Analysis results show that X1.0-X1.9 flares accounted for 52.71 % of all X-class flares, with X2.0-X2.9 flares at 20.59 %, X3.0-X4.9 at 13.57 %, X5-X9.9 at 8.37 % and ≥ X10 at 4.75 %. All X-class flares occurred around the solar maximum during solar cycle 22, while in solar cycle 23, X-class flares were scattered in distribution. In solar cycle 21, X-class flares were distributed neither in a concentrated manner like cycle 22 nor in a scattered manner as cycle 23. During solar cycles 21-23, 32.2 % of the X1.0-X1.9 flares, 31.9 % of the X2.0-X2.9 flares, 43.3 % of the X3.0-X4.9 flares, 81.08 % of the X5.0-X9.9 flares, and 95.2 % of the ≥ X10 flares were produced by SARs.
- Subjects
SOLAR flares; SOLAR cycle; DISTRIBUTION (Probability theory); SCATTERING (Physics); SUNSPOTS
- Publication
Astrophysics & Space Science, 2014, Vol 350, Issue 2, p443
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-013-1773-y