28.06.2026
Sunspot group 4478 has reached the largest size of all the groups in 2026. Its current area is almost 1,200 units (the exact value is 1,190). The previous largest group, No. 4366, observed in February, produced an X8.1 flare and, in passing, broke the 21st-century record for the total number of strong flares, with an area of 1,100 units at its peak.
26.06.2026
Active region 4478, which appeared in Earth's field of view just three days ago, is rapidly growing and has now reached an area of 825 m.s.p. (a unit of measurement for sunspot area), making it the second-largest active region of the year. Among the approximately 160 sunspot groups recorded since January 1, it is second only to region 4366, observed in the first half of February.
25.06.2026
A weak magnetic storm of G1 magnitude is observed. The geomagnetic event began around midnight with moderate disturbances and reached storm level approximately three hours ago. The cause of this phenomenon remains a mystery—it can be seen in the lower graph: a rapid increase in solar wind velocity due to the influence of a coronal hole.
