According to the Laboratory of Solar Astronomy at the Space Research Institute of the Russian Academy of Sciences and the Institute of Solar-Terrestrial Physics at the Siberian Branch of the Russian Academy of Sciences, five less powerful Class C flares have also occurred on the Sun since the beginning of the day.
The most powerful flash was classified as M1.9 and lasted 11 minutes.
The IPG notes that moderate solar flare activity is expected on May 12. New Class M flares are possible. The Earth's geomagnetic field may be unstable. There may also be deterioration of HF radio communication conditions during the day, writes profile.ru.
Depending on the X-ray power, solar flares are divided into five classes: A, B, C, M and X, where X is the most powerful. Class M flashes are considered the average of the large ones. They can provoke magnetic storms on Earth.
In the first four months of 2025, solar flare activity decreased by about 15% compared to the same period in 2024. At the same time, the number of magnetic storms has increased significantly, the Laboratory of Solar Astronomy reported earlier. Experts note that the main decrease in flare activity occurred due to a decrease in the number of the most powerful Class X and M outbreaks.
