Yesterday, on the Sun, a series of M-class flares occurred, as a result of these events a high-energy proton flux was formed, which today reached the Earth, causing a geomagnetic and radiation storm.
The first outbreak of class M1.3 occurred yesterday morning at 08:45 Moscow time, the source of the group was spots № 2673, which is near the center of the solar disk. The outbreak was not accompanied by ejection of the coronal mass.
The second class M1.4 occurred at 18:31 MSK from the same group of spots № 2673, which is near the center of the solar disk. The outbreak was not accompanied by ejection of the coronal mass.
Then there were two more flashes of class M 1.0 and M 1.5 at 21:21 Moscow time and 22:59 Moscow time. The last of them probably produced a coronal mass ejection.
Solar flares are divided into three classes:
X – strong and generating powerful and long radiation storms and radio beacons (magnetic storms);
M – middle class, generating short radiation storms and affecting mainly the polar regions of the Earth;
C – weak flares, which have an insignificant effect on the Earth.