2021 February 25 Sun - AR12803, AR12804, AR12805 and possible AR12806

[PTS]

2021 February 25 Sun - AR12803, AR12804, AR12805 and possible AR12806

The solar disc has undergone violent changes in the past 24 hours.
While AR12803 and AR12805 are relative quiet, AR12804 has produced bright flares and active filaments. Many sunspots are visible in this Class-D group.
Meanwhile, a small active region appears to the east of AR12805, at (S20W08). A small sunspot is visible.
It should be noted that, from the magnetogram, the magnetic polarity of AR12803 is different from that of AR12804, AR12805 and the new possible AR12806. We can see that AR12804 and AR12805 both belong to the old 24th solar cycle.

H-alpha image from Learmonth taken at 05:30 UTC.
Magnetogram and white-light image from SDO, taken at 04:28 UTC and 04:16 UTC respectively.

[Eddy So]