During an unexpected burst of activity on the Sun on 25 August 2026, a series of powerful flares occurred, almost doubling the monthly total in scale. Active region AR4513, located at the center of the visible solar disk, first released three M-class flares (M1.7–M1.9), and then produced the most powerful in this wave — an M7.0 class flare at 10:02 UTC. This energy release was accompanied by a plasma ejection into space and caused radio interference over Africa, Europe, and the Middle East.
Class M on the GOES scale means moderate power: such flares can disrupt shortwave radio communications and cause disturbances in Earth's magnetic field. The interference affected precisely those regions where the Sun was high above the horizon during the flare's peak — this is a fundamental mechanism: the flare's X-ray and ultraviolet radiation directly affects the ionosphere only on the day side of the planet. Region AR4513 with its complex magnetic configuration of type beta-gamma-delta is a classic source of such powerful ejections.
Notably, this active region emerged on the visible side of the Sun about a week ago, but until 25 August it seemed almost exhausted of energy and showed only limited activity. The sudden resurgence of intense flare activity surprised specialists and forced a reassessment of risks. The position of AR4513 almost at the center of the disk sharply increased the likelihood that the coronal mass ejection (CME) would head directly toward Earth, where it could reach our planet 15–72 hours after the flare.
The mechanism of a solar flare is simple but catastrophic in scale: magnetic fields in the photosphere are unstable, they become tangled and suddenly rearrange, releasing colossal energy. Part of it goes into electromagnetic radiation (X-rays and ultraviolet rays), part into plasma that can form a CME. Electromagnetic radiation reaches Earth in about 8,3 minutes, so the recorded time already includes this minimal delay of light propagation.
At the time of the flare, the geomagnetic situation remains relatively calm: the Kp index is about 3, indicating the absence of serious disturbances. Forecasts for the coming days do not yet include an assessment of the impact of a possible CME from M7.0, so any calculations of plasma arrival time remain preliminary. Specialists from the Solar Astronomy Laboratory of IKI RAS note that the flares so far remain below the threshold of class X (maximum), although they are increasing, and potential geomagnetic consequences should not exceed category G3. Fast solar wind from coronal holes, not related to this flare, is expected later — 27–28 August.
Such events vividly demonstrate the close connection of our technosphere with the activity of the nearest star. Radio communication disruptions, GPS failures, interruptions in satellite communications and power grids — all these are direct consequences of solar magnetic activity, which we can only observe, predict, and for which we must prepare in advance. Continuous monitoring of space weather is not a luxury but a necessity for protecting the critical infrastructure of the modern world.
