High risk persists of a potent solar flare endangering Earth

The Sun is currently under close observation as active region 4197, a significant solar feature, has rotated onto the central solar meridian, drawing the attention of all global space weather centres. This region, known for its rapid growth and exceptional size, has been the focus of interest due to a series of unusual events.

No significant flares have been recorded in active region 4197 so far, but intense heating of the surrounding corona has been observed, causing its thermal radiation to increase by three to five times over the past few days. This intense heating suggests a systematic energy accumulation process in active region 4197, a phenomenon that often precedes major solar flares.

The Laboratory of Solar Astronomy of the Institute of Space Research of the Russian Academy of Sciences reports high solar activity today. The scenario of a major solar flare from active region 4197 is considered the main one, despite the lack of direct evidence of energy accumulation.

Almost all sunspots have disappeared on the Sun, a phenomenon that is not unusual during the approach to the solar maximum in 2025. With increasing activity, stronger flares like the last X1.9 flare on June 19, 2025, are expected potentially in the coming months. Active sunspot regions near the solar eastern limb are currently growing, which may produce significant flares soon.

Global agencies have again issued the highest probability of X-class flares from active region 4197, reaching up to 60-80% in some estimates. The main flare energy in the corona of active region 4197 accumulates in the form of electric currents, inaccessible to modern observation methods.

Despite the lack of direct evidence, the potential threat from active region 4197 is considered significant. Major solar flares are a potential threat to the planet, given the current state of active region 4197. The active region is expected to pose the greatest threat to the planet in the next two days.

It's important to note that the Sun has not experienced a major flare in two months. However, the absence of a major flare does not necessarily mean that one won't occur. Space weather experts are urging caution and vigilance, reminding the public to stay informed and prepared for any potential solar events.