Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983cha%26a...7..165t&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 7, Issue 3, p. 165-166.
Astronomy and Astrophysics
Astrophysics
Scientific paper
A statistical analysis of the surface distribution of the larger solar flares of the 21st cycle is carried out in this paper. The results are as follows: (1) There exist two active longitude belts, 220°-140° and 340°-320°. (2) The distribution of flares is assymetric about the solar equator. (3) Active regions located in 50°-60° E and 10°-20° W are good producers of flares; those in 80°-90° E (i.e., near the East limb) and 60°-70° W are poor producers. (4) The autocorrelation function of the flare series shows that a flare active region has a large probability of producing another flare after one rotation and a small probability of so doing after more than one rotation, and that there is a high probability of a flare occurring in the region next to the one in which a flare has already occurred.
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