02.07.2026
Sunspot group 4478 has further expanded in size over the past 24 hours, reaching an area of 1,550 units. Over the past decade, it is now second in size only to the legendary active region 3664, observed in May 2024 and responsible for the strongest magnetic storm in 20 years on May 11-12 of that year.
01.07.2026
A solar flare of the highest magnitude, X, as reported yesterday, occurred almost exactly at midnight Moscow time on the night of June 30–July 1. The time of maximum is listed in the catalog as 08:50 PM UTC.
30.06.2026
The largest sunspot group of 2026, No. 4478, captured by photographer Alfredo Vidal Perez (Spain, Barcelona)
