Major Solar Flare from AR 4473: does it peak its activity?
ATel #17852; Costantino Sigismondi (ICRANet, Pescara and UPRA-ISF, Roma)
on 21 Jun 2026; 22:30 UT
Credential Certification: Costantino Sigismondi (sigismondi@icra.it)
Subjects: Radio, Optical, Ultra-Violet, X-ray, The Sun
The predominant region AR 4473 (see ATel #17851) just released a major flare peaked at M6.9 at 19:29 UT of 21 June 2026.
It may be the last significant flare of the series, if the AR4473 region behaves like the other predominant active regions mentioned in the previous ATel#17851, where the prediction of this flare was published.
Then the three days of intense activity would result a characteristic of the descending phase, after the solar maximum, of the present solar cycle no. XXV (2019-2030).
Further observations will permit to include this region among the rapid predominant regions (three days duration) or the superflaring regions (more intense flares, lasting up to two or three solar rotations, as the AR 3664-AR 3697 of May-June 2024, or the AR 4366 of February 2026, see also ATel#17644).
The activity of the AR 4473 started on 19 June 2026, until 21 June it is reported in the following link (pdf); its predominance during this period of time is evident.
The activity of the solar AR 4473 (19-21 June 2026)
