The sun produced its strongest solar flare of 2025, an X5. 1-class eruption from sunspot AR4274 triggering severe radio disruptions across continents. What does this mean for northern lights? What's an X-class solar flare? Click here for more Space. The sun has erupted in a relentless barrage of. . A series of three powerful flares and associated explosions of solar material out across the Solar System have set Earth squarely in the path of a "severe"-level geomagnetic storm. NASA's Solar Dynamics Observatory, which watches the Sun constantly, captured images of the events.
[PDF Version]
