Massive Sun Hole Sparks 60% Surge in Geomagnetic Storms by 2025's End

A vast coronal hole has dominated the Sun since early 2025, stretching nearly a million kilometres across its surface. This unusual feature has triggered a sharp increase in geomagnetic storms, with a 60% rise recorded over the past year alone.

The surge in solar activity began in the first months of 2025, as the Sun's outer layer became dominated by these dark, cooler regions. Known as coronal holes, they release high-speed solar wind that disrupts Earth's magnetic field. By the end of the year, the number of geomagnetic storms had climbed by 60%.

Current data shows no sign of this trend slowing down. Researchers anticipate even more frequent storms in 2026, potentially surpassing last year's figures. The heightened activity is expected to persist until around 2028, when solar conditions should shift rapidly.

After that peak, the Sun's activity will decline swiftly. Forecasts suggest a solar minimum—the quietest phase of the solar cycle—by the turn of 2029–2030.

The ongoing rise in geomagnetic storms reflects the Sun's volatile history, with no immediate reversal in sight. While the peak may last until 2028, a steep drop in solar activity is projected soon after. This will likely bring quieter conditions by the end of the decade.