A sunspot 10 times larger than Earth has appeared on the surface of the sun just as an X1.9-rated solar flare occurred.

A sunspot, potentially generating multiple solar flares, may lead to auroras that could be visible as far south as Alabama.

A vast, volatile blemish has opened on the face of the Sun, and it is already rewriting the current solar cycle’s record book ...

A powerful X1.9 solar flare from new sunspot AR4299 triggered strong radio blackouts, as giant sunspot AR4294 rotates into ...

On December 1, 2025, NASA's Solar Dynamics Observatory observed a large spot on the Sun, known as Active Region (AR) 4294-96.

A massive sunspot complex, AR 4294-96, has rotated into view, nearly matching the size of the Carrington Event sunspot.

The Sun is covered in dark patches bigger than Earth. A powerful flare has already erupted, with more likely coming.

A massive sunspot cluster, reminiscent of the infamous Carrington Event, has emerged on the sun's surface, sparking intrigue ...

Solar flares and other activity can disrupt radio communications, power grids and navigation signals, according to NASA.

Radiation levels at airline flight altitudes briefly reached levels that could be potentially harmful to pregnant women.