Northern lights occur when a solar flare interacts with Earth's atmosphere.

Fired from a vast sunspot, the "coronal mass ejection" is expected to reach Earth on either Thursday or Friday this week.

The flares are coming from a solar region that was created in late January.

A new sunspot group has quickly grown and is spewing out the most intense type of solar flare. Effects on Earth are forecast ...

Scientists say this powerful surge in solar activity could set the stage for the northern lights to appear as early as ...

The Sun has unleashed a quartet of strong solar flares, which could herald a wild week of space weather. It all kicked off at ...

A strong solar flare peaked just after 9 a.m. Tuesday. What does that mean?

The Sun has released four powerful X-class solar flares in just two days, alarming scientists worldwide. Experts warn these ...

The Sun unleashed powerful X-class solar flares from sunspot region AR 4366, tracked by NASA and the Solar Dynamics ...

Sun solar flares disrupted parts of Earth this week after a highly active sunspot unleashed the strongest eruptions seen so ...

The sun has unleashed a volley of four powerful solar flares towards Earth, as scientists warn that they could wreak havoc on radios and GPS satellites.