A strong magnetic storm is expected to begin during the day

The officially declared over and almost forgotten surge in solar activity from the beginning of the month is expected to trigger a strong (up to G3 level) planetary-scale magnetic storm today, according to calculations by mathematical models. The last of the plasma clouds, which flew off the Sun somewhere sideways and downwards on June 6th, should resurface near Earth today along some unknown trajectory, according to mathematical models. The confidence of the models in this scenario is impressive. The probability of a storm today is estimated at 96%, and the chances that the event will last more than 24 hours and extend into tomorrow are also estimated at 85%.

Frankly speaking, the author of this message personally wouldn't bet a ruble on such a scenario, but in this day and age, who are people to argue with AI and similar systems? So, here we go.

Seriously speaking, the main argument for the forecast was data from the STEREO spacecraft, which is currently viewing the Earth and the Sun sideways from a distance of about 100 million kilometers. It sent back images yesterday, according to which, from this angle, it is clear that the plasma cloud is headed directly toward Earth. Coronagraphs operating near Earth also reported a "halo" event—the classification for ejections headed toward Earth. In short, we'll know the results very soon. According to calculations, the plasma could reach Earth within 2-3 hours.