The powerful X1.1 solar flare from sunspot region 4298 sparked strong radio blackouts on the sunlit portion of Earth at the ...

The National Oceanic and Atmospheric Administration (NOAA) has issued a strong geomagnetic storm watch for Monday evening, December 8, after the Sun released a major burst of energy. This alert means ...

Scientists can usually spot coronal mass ejections before they affect Earth—but this one snuck past coronagraphs and ...

At 10:04 UTC on November 11, the Sun fired an X5.1-class solar flare from Active Region 4274, launching an asymmetric halo coronal mass ejection (CME) toward Earth at extraordinary speed. This was not ...

Sunspot AR4618 erupted with an M4.4-class solar flare causing a coronal mass ejection (CME) that may give Earth a glancing blow. NASA's Solar Dynamics Observatory captured the fireworks in multiple ...

The star at the center of the solar system does more than provide light and warmth. It also acts as the most powerful particle accelerator in the neighborhood, whipping electrons to near-light speed ...

Update: November 11, 5:09 p.m. ET: NOAA has issued a G4 warning for a severe geomagnetic storm for November 12. This CME, associated with the X.51 solar flare, is the most energetic and fastest of the ...

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