The strongest category of solar flares, known to potentially cause worldwide transmission problems and blackouts, could be emitted this week, scientists say. On Sunday, radio blackouts were ...

The flare on May 13 was classified as an X1.2 flare, while the following day's event was listed as an X2.7 flare — the number provides more information about the event's strength, according to NASA.

And “Flares of this magnitude are not frequent,” according to a statement from the NOAA officials. A blazing X2.7-class solar flare erupted from sunspot AR4087 early Tuesday, ...

There were significantly more X-class solar flares in 2024 than any other year for at least three decades. The arrival of solar maximum was a key reason for the spike, but other factors were also ...

The sun has had an active few days, firing several powerful solar flares and (plumes of searing-hot solar material out into space. On Tuesday (May 13), a sunspot on the sun's surface named AR4086 ...

Rare solar flares caused blackouts worldwide this week, and experts say this may not be the worst of it. On Tuesday and Wednesday, parts of Europe, North America, South America, Asia, and the ...

These flares were initially reported as X8.2 and X9.3, but later reclassified as X13.3 and X11.8 after the NOAA flare recalibration in 2020.

What's behind black hole 'fireworks,' according to scientists A team of astrophysicists have found flares of light in Sagittarius A*, a supermassive black hole in the center of the Milky Way.