Abstract
We have studied the latitude and longitude (northern and southern hemispheric) distributions based on 2277 LDE flares observed during the period from 1966 to 1986. We have found that there exist active zones, in which the LDE flare occurrence rate is much higher. Latitudinal belts between 11–20° and longitudinal belts around 80–100° are the most prolific places to produce LDE flares. During cycles 20 and 21 these active zones produced 36% of the total number of LDE flares by occupying only 6% area of the Sun.
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Özgüç, A., Düzgelen, A. Distribution of LDE flares on the Sun during solar cycles 20 and 21. Astrophys Space Sci 162, 27–33 (1989). https://doi.org/10.1007/BF00653342
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DOI: https://doi.org/10.1007/BF00653342