After last week's explosive X-flare, sunspot AR4046 is at it again! Could this latest eruption bring stormy space weather to ...

Solar flares are classified based on their strength and fall into five designated categories: A, B, C, M and X. An X-class solar flare is the most intense type of solar flare and can produce as ...

The sun has somewhat surprised forecasters today with a dramatic X-class solar flare from a newly emerging sunspot region.The ...

An unexpected X-class solar flare from a new sunspot region caused widespread radio blackouts across the Americas today ...

Unlike the previous event, this latest eruption could have a greater impact on Earth ... the chances of an X-class flare — the most powerful category of solar flares — at 25% over the next ...

Increased auroral activity will likely result from geomagnetic storms Friday and Saturday amid “influence” from a coronal ...

A powerful X-class solar flare was unleashed by an emerging sunspot region leading to radio blackouts over large parts of ...

A powerful X1.1-class solar flare causes radio blackouts across the Americas. It was followed by a coronal mass ejection.

Auroras are possible over the U.S. tonight (March 25) as a "moderate" geomagnetic storm hits Earth. UPDATE: The Northern ...

Only a few years ago, astronomers heralded the discovery of a rocky world circling the sun 's closest space neighbor, Proxima ...