Abstract
The active regions (ARs) on the Sun, which are distinguished by high values of the flare index and simultaneously developed outside activity complexes (ACs), have been analyzed. Thirteen such objects were identified in cycle 24. We showed that these ARs belong to the category of relatively long-lived large groups of sunspots, characterized by an increased rate of area growth. These ARs are part of the AR complexes, connect with other AR systems of high coronal systems, including trans-equatorial ones. We associated some of these ARs with short-lived (less than 3 Carrington rotations) ACs and some ARs are components of complexes of ARs. All 13 considered ARs were located near coronal holes.
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ACKNOWLEDGMENTS
The authors are grateful to V.M. Tomozov for useful discussions and comments.
Funding
This work was supported by the Ministry of Education and Science of Russia (state orders FZZE-2020-0017, FZZE-2020-0024).
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Yazev, S.A., Isaeva, E.S. & Ishmukhametova, Y.V. Active Regions on the Sun with Increased Flare Activity in Cycle 24. Astron. Rep. 65, 507–517 (2021). https://doi.org/10.1134/S1063772921070064
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DOI: https://doi.org/10.1134/S1063772921070064